Re: [CentOS] SAN help

[Rajagopal Swaminathan]

Greetings,

On Fri, Jan 8, 2010 at 11:31 AM, Paras pradhan  wrote:
> I did create the device mapper for multipathing but while testing
> failover is not working. So my concern is with the hba driver since I
> am seeing more than expected.
>

Check for the kernel modules for device mapper. I cant off hand tell
you which one of those are. also re check the zoning config.

Regards

Rajagopal
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Re: [CentOS] SAN help

[Paras pradhan]

I did create the device mapper for multipathing but while testing
failover is not working. So my concern is with the hba driver since I
am seeing more than expected.


Thanks

Paras

On Thursday, January 7, 2010, Rajagopal Swaminathan
 wrote:
> Greetings,
>
> On Fri, Jan 8, 2010 at 11:01 AM, Paras pradhan  wrote:
>> Hi Rajagopal,
>>
>> Do you mean to say this is typical and is resolved after we use device
>> mapper multipathing?
>>
>
> IIRC, in about 2008.11 I was tasked build a cluster with SAN. The san
> administrator created 3 LUNs and first time around, it showed 12 LUNs.
> I think it was RHEL4. Afer installation of the multipathing software
> from server vendor site, we got the 3 LUNs properly. But at that time
> I did sweat a little.
>
> Of course assuming you have two qlogic, 2 san switches etc etc.
>
> In short, most likely yes.
>
> BTW I am not a storage administrator
>
> Regards,
>
> Rajagopal
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Re: [CentOS] SAN help

[Rajagopal Swaminathan]

Greetings,

On Fri, Jan 8, 2010 at 11:01 AM, Paras pradhan  wrote:
> Hi Rajagopal,
>
> Do you mean to say this is typical and is resolved after we use device
> mapper multipathing?
>

IIRC, in about 2008.11 I was tasked build a cluster with SAN. The san
administrator created 3 LUNs and first time around, it showed 12 LUNs.
I think it was RHEL4. Afer installation of the multipathing software
from server vendor site, we got the 3 LUNs properly. But at that time
I did sweat a little.

Of course assuming you have two qlogic, 2 san switches etc etc.

In short, most likely yes.

BTW I am not a storage administrator

Regards,

Rajagopal
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Re: [CentOS] SAN help

[Paras pradhan]

Hi Rajagopal,

Do you mean to say this is typical and is resolved after we use device
mapper multipathing?


Paras.


On Thu, Jan 7, 2010 at 11:06 PM, Rajagopal Swaminathan <
raju.rajs...@gmail.com> wrote:

> Greetings,
>
> On Fri, Jan 8, 2010 at 10:08 AM, Paras pradhan 
> wrote:
> > My CentOS 5.4 box has a single HBA card with 2 ports connected to my
> > Storage. 2 Luns are assigned to my HBA card. Under /dev instead of seeing
> 4
> > devices I can see 12 devices from sdb to sdm. I am using qlogic driver
> that
> > is bulitin to the OS. Has any one seen this kind of situation?
> >
> > Paras
>
>
> A case before multipathing is installed.
>
> Install multipathing device driver from the server vendor's site.
>
> One thing to remember: always prefer rpm as first and second choice.
>
> Regards,
>
> Rajagopal
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Re: [CentOS] SAN help

[Paras pradhan]

Yes here is th o/p of fdisk -l. Two Luns are assigned. one of 323 G and
another of 359 G as seen blow. sda is my local disk.
So do you think incorrect zoning can lead to this?

Thanks
Paras.

-
[r...@prd1 ~]# fdisk -l

Disk /dev/sda: 146.1 GB, 146163105792 bytes
255 heads, 63 sectors/track, 17769 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

   Device Boot  Start End  Blocks   Id  System
/dev/sda1   *   1  33  265041   83  Linux
/dev/sda2  34421033551752+  82  Linux swap / Solaris
/dev/sda34211682120972857+  83  Linux
/dev/sda46822   17769879398105  Extended
/dev/sda56822   1776987939778+  83  Linux

Disk /dev/sdb: 323.4 GB, 323459481600 bytes
255 heads, 63 sectors/track, 39325 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

   Device Boot  Start End  Blocks   Id  System
/dev/sdb1   1   2   16033+  83  Linux
/dev/sdb2   3   39325   315861997+  83  Linux

Disk /dev/sdc: 359.3 GB, 359399424000 bytes
255 heads, 63 sectors/track, 43694 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

   Device Boot  Start End  Blocks   Id  System
/dev/sdc1   1   43694   350972023+  83  Linux

Disk /dev/sdd: 323.4 GB, 323459481600 bytes
255 heads, 63 sectors/track, 39325 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

   Device Boot  Start End  Blocks   Id  System
/dev/sdd1   1   2   16033+  83  Linux
/dev/sdd2   3   39325   315861997+  83  Linux

Disk /dev/sde: 323.4 GB, 323459481600 bytes
255 heads, 63 sectors/track, 39325 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

   Device Boot  Start End  Blocks   Id  System
/dev/sde1   1   2   16033+  83  Linux
/dev/sde2   3   39325   315861997+  83  Linux

Disk /dev/sdf: 359.3 GB, 359399424000 bytes
255 heads, 63 sectors/track, 43694 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

   Device Boot  Start End  Blocks   Id  System
/dev/sdf1   1   43694   350972023+  83  Linux

Disk /dev/sdg: 323.4 GB, 323459481600 bytes
255 heads, 63 sectors/track, 39325 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

   Device Boot  Start End  Blocks   Id  System
/dev/sdg1   1   2   16033+  83  Linux
/dev/sdg2   3   39325   315861997+  83  Linux

Disk /dev/sdh: 323.4 GB, 323459481600 bytes
255 heads, 63 sectors/track, 39325 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

   Device Boot  Start End  Blocks   Id  System
/dev/sdh1   1   2   16033+  83  Linux
/dev/sdh2   3   39325   315861997+  83  Linux

Disk /dev/sdi: 359.3 GB, 359399424000 bytes
255 heads, 63 sectors/track, 43694 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

   Device Boot  Start End  Blocks   Id  System
/dev/sdi1   1   43694   350972023+  83  Linux

Disk /dev/sdj: 323.4 GB, 323459481600 bytes
255 heads, 63 sectors/track, 39325 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

   Device Boot  Start End  Blocks   Id  System
/dev/sdj1   1   2   16033+  83  Linux
/dev/sdj2   3   39325   315861997+  83  Linux

Disk /dev/sdk: 323.4 GB, 323459481600 bytes
255 heads, 63 sectors/track, 39325 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

   Device Boot  Start End  Blocks   Id  System
/dev/sdk1   1   2   16033+  83  Linux
/dev/sdk2   3   39325   315861997+  83  Linux

Disk /dev/sdl: 359.3 GB, 359399424000 bytes
255 heads, 63 sectors/track, 43694 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

   Device Boot  Start End  Blocks   Id  System
/dev/sdl1   1   43694   350972023+  83  Linux

Disk /dev/sdm: 323.4 GB, 323459481600 bytes
255 heads, 63 sectors/track, 39325 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

   Device Boot  Start End  Blocks   Id  System
/dev/sdm1   1   2   16033+  83  Linux
/dev/sdm2   3   39325   315861997+  83  Linux



On Thu, Jan 7, 2010 at 11:26 PM, Eero Volotinen wrote:

> On 1/8/10 7:21 AM, Paras pradhan wrote:
> >
> >
> > On Thu, Jan 7, 2010 at 11:08 PM, Eero Volotinen  > > wrote:
> >
> > On 1/8/10 6:38 AM, Paras pradhan wrote:
> >  > My CentOS 5.4 box has a single HBA card with 2 ports connected to
> my
> >  > Storage. 2 Luns are assigned to my HBA card. Under /dev instead of
> >  > seeing 4 devices I can see 12 devices from sdb to sdm. I am using
> > qlogic
> >  > driv

Re: [CentOS] SAN help

[Eero Volotinen]

On 1/8/10 7:21 AM, Paras pradhan wrote:
>
>
> On Thu, Jan 7, 2010 at 11:08 PM, Eero Volotinen  > wrote:
>
> On 1/8/10 6:38 AM, Paras pradhan wrote:
>  > My CentOS 5.4 box has a single HBA card with 2 ports connected to my
>  > Storage. 2 Luns are assigned to my HBA card. Under /dev instead of
>  > seeing 4 devices I can see 12 devices from sdb to sdm. I am using
> qlogic
>  > driver that is bulitin to the OS. Has any one seen this kind of
> situation?
>
> Sounds like zoning problem ..
>
>
> Storage is HDS and the LUN type created was of type netware. I don't
> know why this type but my storage administrator said its correct. This
> might be an issue?
>
> Or if you can ellaborate how this is zoning problem it wud be great help.

Are you sure that you can see correct luns? check the size ?

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Re: [CentOS] SAN help

[Paras pradhan]

On Thu, Jan 7, 2010 at 11:08 PM, Eero Volotinen wrote:

> On 1/8/10 6:38 AM, Paras pradhan wrote:
> > My CentOS 5.4 box has a single HBA card with 2 ports connected to my
> > Storage. 2 Luns are assigned to my HBA card. Under /dev instead of
> > seeing 4 devices I can see 12 devices from sdb to sdm. I am using qlogic
> > driver that is bulitin to the OS. Has any one seen this kind of
> situation?
>
> Sounds like zoning problem ..
>

Storage is HDS and the LUN type created was of type netware. I don't know
why this type but my storage administrator said its correct. This might be
an issue?

Or if you can ellaborate how this is zoning problem it wud be great help.

Paras.


>
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Re: [CentOS] SAN help

[Paras pradhan]

Hi,


On Thu, Jan 7, 2010 at 11:06 PM, Rajagopal Swaminathan <
raju.rajs...@gmail.com> wrote:

> Greetings,
>
> On Fri, Jan 8, 2010 at 10:08 AM, Paras pradhan 
> wrote:
> > My CentOS 5.4 box has a single HBA card with 2 ports connected to my
> > Storage. 2 Luns are assigned to my HBA card. Under /dev instead of seeing
> 4
> > devices I can see 12 devices from sdb to sdm. I am using qlogic driver
> that
> > is bulitin to the OS. Has any one seen this kind of situation?
> >
> > Paras
>
>
> A case before multipathing is installed.
>
> Install multipathing device driver from the server vendor's site.
>

Server is Dell R905 series , HBA is qlogic and OS is CentOS/Redhat 54. So
you mean use the rpm package from red hat?

>
> One thing to remember: always prefer rpm as first and second choice.
>
> Regards,
>
> Rajagopal
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Re: [CentOS] SAN help

[Eero Volotinen]

On 1/8/10 6:38 AM, Paras pradhan wrote:
> My CentOS 5.4 box has a single HBA card with 2 ports connected to my
> Storage. 2 Luns are assigned to my HBA card. Under /dev instead of
> seeing 4 devices I can see 12 devices from sdb to sdm. I am using qlogic
> driver that is bulitin to the OS. Has any one seen this kind of situation?

Sounds like zoning problem ..

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Re: [CentOS] SAN help

[Rajagopal Swaminathan]

Greetings,

On Fri, Jan 8, 2010 at 10:08 AM, Paras pradhan  wrote:
> My CentOS 5.4 box has a single HBA card with 2 ports connected to my
> Storage. 2 Luns are assigned to my HBA card. Under /dev instead of seeing 4
> devices I can see 12 devices from sdb to sdm. I am using qlogic driver that
> is bulitin to the OS. Has any one seen this kind of situation?
>
> Paras


A case before multipathing is installed.

Install multipathing device driver from the server vendor's site.

One thing to remember: always prefer rpm as first and second choice.

Regards,

Rajagopal
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Re: [CentOS] 8-15 TB storage: any recommendations?

[Christopher Chan]

Warren Young wrote:
> On 1/7/2010 6:01 PM, Christopher Chan wrote:
>>> I'm not recommending OpenSolaris on purpose.
>> Serious system administrators are not Linux fans I don't think.
> 
> I think I must have been sent back in time, say to 1997 or so, because I 
> can't possibly be reading this in 2010.  I base this on the fact that 
> your statement logically means there are no serious Linux sysadmins, 

Huh? How did YOU get from what I wrote to 'no serious Linux sysadmins'. 
I used to be Linux for everything too. Grow up.

> which is of course is so much hooey that no one believes this any more 
> in the time I come from.  Therefore, I must have been sent far enough 
> back in time that such statements were still uttered with complete 
> seriousness.

Given that there are others besides me on this list that have pointed 
elsewhere other than Linux for stuff like firewalling and I suspect 
probably throughout the history of the list, I think you have a serious 
case of tinted corneas.

> 
> I guess the other possibility is that someone's gatewayed a Usenet 
> advocacy group to this list.
> 
>> I find pkg on OpenSolaris to be more akin to yum or apt than ports
> 
> In some ways, sure.  Ports is definitely a different way of doing 
> things, though, I think, not a bad one.

Right.

> 
> There are several areas where OpenSolaris' package system falls down:
> 
> 1. No free updates.  Even if you just want security fixes, you have to 
> buy a support contract.  (If you think this is reasonable, why are you 
> here on the CentOS list, a place for discussing a solution to a 
> different but similar problem?)

I do not know what you are talking about. No free updates? OpenSolaris 
happens to be open source FYI. Maybe you should first learn about 
something before you start dissing it. Fanboys like you are what give 
Linux a bad name.

Even Solaris has free updates and I have been able to go and download 
patches. Last I did that anyway. But recently I brought this up about 
Solaris on the OpenSolaris irc channel and there are tools that automate 
all this and again, you do not need a support contract. But good luck 
trying file bug reports or get support.


> 
> 2. There is no upgrade path from release to release other than 
> "reinstall", and releases are spaced just 6 months apart.  Between this 
> and the previous problem, it means I have to reinstall my server every 6 
> months to keep up to date if I don't want to buy a support contract. 
> Those serious sysadmins where you come from like this sort of thing?  In 
> my world, we prefer OSes with long term support so we can stay current 
> on a release for years at a time.

??? What on earth are you on about? Are you talking about Ubuntu? 
Fedora? ???

I have never "reinstalled" my two OpenSolaris servers and I have 
upgraded from one release to another smoothly.

> 
> 3. The main package repo is pretty sparse.  If you want anything even a 
> little bit nonstandard you end up downloading sources from the Internet 
> and compiling by hand, which may not even succeed since Solaris is down 
> in the third tier or so of popularity these days.  At least with 
> FreeBSD's ports, you're pretty much guaranteed that it will build and 
> install with "sudo make install clean", even chasing down dependencies 
> for you automatically.

Hang on. I thought we were talking about OpenSolaris? I don't use 
Solaris because I don't like its 'dual' package management system.


> 
> 4. At least back in the 2008.05 and 2008.11 days when I last tried to 
> really use OpenSolaris, I found IPS to be quite immature.  I managed, 
> twice, to render a machine unbootable simply by removing packages I 
> thought I didn't need, using the GUI package manager.  No warnings, just 
> boot...bang.  Now maybe I'm being unrealistic, but I would think one of 
> the basic requirements for a package manager is that it know enough 
> about dependencies to refuse to let me uninstall core system components.

I like the 'I thought I didn't need' part. Especially since OpenSolaris 
gives you the ability to clone boot environments to experiment on so 
that if you do mess up, you can just boot back into a working boot 
environment. Sorry, no sympathy from me on this score if that is what 
you are going to base your reason not to use OpenSolaris at all.


>> and then there is always nexenta if I
>> really want a complete GNU userland and apt/dpkg.
> 
> How many different machines have you tried it on?  Perhaps you have been 
> lucky, and have found that it installs on everything you want it to run 
> on.

Nexenta? One. A Dell. alpha5 too. Had to drop it since the Nexenta guys 
were short handed and did not have an update to a release that had an 
iscsi fix that was necessary for exporting to Windows. I make a point to 
build hardware that works with the matrix of possible operating systems 
I will use.


> 
> In my experience, both NCP and NexentaStor made me jump through quite a 
> few hoops to find a hardwar

[CentOS] SAN help

[Paras pradhan]

My CentOS 5.4 box has a single HBA card with 2 ports connected to my
Storage. 2 Luns are assigned to my HBA card. Under /dev instead of seeing 4
devices I can see 12 devices from sdb to sdm. I am using qlogic driver that
is bulitin to the OS. Has any one seen this kind of situation?

Paras
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Re: [CentOS] MIgrate/Upgrade from Centos 5.4 32bit to Centos 5.4 64bit

[Oliver Schulze L.]

Thanks all for the help.

I will boot in rescue mode, then rename all directories, install the 
64bit version
and then restore all the files.

I have been upgrading this server in redhat 4.2 i386, so this time there 
is a need
for platform upgrade also.

It has been a long way from a P2 to a Core2Duo Quad ;)

Regards,
Oliver
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El 05/01/10 17:09, Robert Heller escribió:
> At Tue, 5 Jan 2010 11:26:32 -0800 CentOS mailing list  
> wrote:
>
>
>> On Tue, Jan 5, 2010 at 11:24 AM, MHR  wrote:
>>  
>>> On Tue, Jan 5, 2010 at 7:46 AM, Oliver Schulze L.  
>>> wrote:
>>>
 Hi,
 It is posible to do a simple procedure to upgrade a Centos 5.4 32bits
 (i686) to
 a Centos 5.4 64bits(x32_64)?

 I was thinking about an upgrade or install without formating.

 I will have a current backup before doing it.

 Any advice/tips is welcome.

  
>>> I *strongly* doubt it.  When you go from 32 to 64 bit systems, you are
>>> essentially replacing the kernel and (at least) about 90% of the
>>> standard libraries.  I am willing to bet that this mandates an
>>> installation.
>>>
>>> For the record, I've never tried it.  When I put CentOS on my machine,
>>> I already had a 64-bit CPU and I never seriously considered NOT using
>>> the 64-bit install.
>>>
>>> HTH.
>>>
>>> mhr
>>>
>>>
>> Sorry - PS:  IIRC, you don't _have_ to format your disks to install
>> over what's on them - check the installation options when you get that
>> far and read through them carefully.  You should be able to re-use
>> existing partitions, but I can't remember whether that *requires*
>> reformatting them - I've just always done that (reformat them).
>>  
> You really should/ought to reformat /, /usr, and /var.  /boot and /home
> don't need to be reformated (leaving /boot alone allows for multi-OS
> version booting, eg CentOS 4 and CentOS 5 or Ubuntu and CentOS or CentOS
> and Fedora, etc.).  The installer will be unhappy about NOT reformatting
> /, /usr, or /var.  It will warn about not reformatting /boot -- this is
> generally OK though.  It will NOT complain about not reformatting /home
> or any other random non-system file system you might have (I do things
> like have a dedicated /mp3s file system on my laptop for example).
>
> Unlike the *default* file system setup, which only creates /boot and /
> file systems, it is *strongly* recomended to instead create separate
> /boot, /, and /home file systems (at least these three -- separating
> out /usr and/or /var might make sense under some situations, esp.
> servers) -- this allows updates, multi-OS, and recovery without having
> to make an explicit backup (although, having backups is still
> recomended!).
>
>
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>>  
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>
>
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Re: [CentOS] 8-15 TB storage: any recommendations?

[Warren Young]

On 1/7/2010 6:01 PM, Christopher Chan wrote:
>
>> I'm not recommending OpenSolaris on purpose.
>
> Serious system administrators are not Linux fans I don't think.

I think I must have been sent back in time, say to 1997 or so, because I 
can't possibly be reading this in 2010.  I base this on the fact that 
your statement logically means there are no serious Linux sysadmins, 
which is of course is so much hooey that no one believes this any more 
in the time I come from.  Therefore, I must have been sent far enough 
back in time that such statements were still uttered with complete 
seriousness.

I guess the other possibility is that someone's gatewayed a Usenet 
advocacy group to this list.

> I find pkg on OpenSolaris to be more akin to yum or apt than ports

In some ways, sure.  Ports is definitely a different way of doing 
things, though, I think, not a bad one.

There are several areas where OpenSolaris' package system falls down:

1. No free updates.  Even if you just want security fixes, you have to 
buy a support contract.  (If you think this is reasonable, why are you 
here on the CentOS list, a place for discussing a solution to a 
different but similar problem?)

2. There is no upgrade path from release to release other than 
"reinstall", and releases are spaced just 6 months apart.  Between this 
and the previous problem, it means I have to reinstall my server every 6 
months to keep up to date if I don't want to buy a support contract. 
Those serious sysadmins where you come from like this sort of thing?  In 
my world, we prefer OSes with long term support so we can stay current 
on a release for years at a time.

3. The main package repo is pretty sparse.  If you want anything even a 
little bit nonstandard you end up downloading sources from the Internet 
and compiling by hand, which may not even succeed since Solaris is down 
in the third tier or so of popularity these days.  At least with 
FreeBSD's ports, you're pretty much guaranteed that it will build and 
install with "sudo make install clean", even chasing down dependencies 
for you automatically.

4. At least back in the 2008.05 and 2008.11 days when I last tried to 
really use OpenSolaris, I found IPS to be quite immature.  I managed, 
twice, to render a machine unbootable simply by removing packages I 
thought I didn't need, using the GUI package manager.  No warnings, just 
boot...bang.  Now maybe I'm being unrealistic, but I would think one of 
the basic requirements for a package manager is that it know enough 
about dependencies to refuse to let me uninstall core system components.

After discovering all that, I'm afraid I rather lost interest in trying 
to make serious use of OpenSolaris.  I keep a VM of it around merely to 
test compatibility with a free software project I maintain.  I won't 
install it on anything critical now, not without taking the time to do a 
complete reeval of it, anyway.  It's been a year...maybe it's time.

> and then there is always nexenta if I
> really want a complete GNU userland and apt/dpkg.

How many different machines have you tried it on?  Perhaps you have been 
lucky, and have found that it installs on everything you want it to run 
on.

In my experience, both NCP and NexentaStor made me jump through quite a 
few hoops to find a hardware configuration they were happy with.  Even 
after I got them working, neither seemed valuable enough to bother 
sticking with them, compared to OSes I already know and trust to just run.

> Does it support direct sharing/exporting as nfs/cifs/iscsi

NFS, yes, that's how I'm using it.

CIFS, no, as there is no CIFS support in FreeBSD's kernel.  Of course, 
you can always just use Samba.

iSCSI, no, because there isn't yet any iSCSI serving support in FreeBSD 
of any kind.  Since I didn't want my ZFS pools to be directly attached 
to another machine, but rather shared among multiple machines in 
traditional file-server manner, this didn't cause a problem for me.

Let me bounce this ball back in your court: how about AFS, for the Macs 
in your organization?  ZFS has no direct support for it on either 
platform, but at least on FreeBSD and most Linuxes, it's a supported 
package, available on demand, already preconfigured for that system. 
All you have to do is do local customizations to the configuration, set 
it to start automatically, and you're done.  With OpenSolaris, it's a 
fully manual process.

> Does it support using ZFS for booting

Not as part of the OS installer, but it can be done:

http://lulf.geeknest.org/blog/freebsd/Setting_up_a_zfs-only_system/

This doesn't interest me because it shares the same limitation as on 
Solaris, which is that it will only work with a mirror.  I don't want to 
dedicate two disks just to the OS if I want a RAID-Z pool for actual data.

My solution for high root FS reliability was to put it on a CF card.  In 
addition to being solid state, it has a few side benefits:

- It lets me use an otherwise unused ATA connection

Re: [CentOS] Laptop for CentOS-5

[Jake Shipton]

On 07/01/10 18:37, James B. Byrne wrote:
> I have a defective HP-Compaq nx9420 and so I am looking to replace
> it.  I have pretty much decided to buy no further MicroSoft based
> products and would very much like to hear recommendations for a
> suitable notebook host to provide me with Linux based alternative.
> 
> Given that all the basic functionality required is provided, the
> main thing that I am looking for is reliability of the host itself. 
> I do a deal of traveling so physical robustness is an issue.  But I
> also use my notebook for hours at a time, generally every day. This
> means that I am typically on a/c current rather than batteries and
> that power regulation and heat dissipation are also concerns.  The
> power regulator circuit is in fact what I believe has failed on the
> nx9420.
> 
> Not infrequently I have the notebook on my chest or lap while
> working at home.  So the ventilation clearances provided by a flat
> desk support are frequently absent and the notebook design must
> accommodate this.
> 
> I would like to use CentOs as this is what I am most familiar with. 
> But, I am open to CentOS alternatives like Ubuntu or even a
> non-Linux alternative like a PowerMac with OS-X.
> 
> I have already looked at the Dell site on the basis of a friends
> recommendation. While Dell mentions Ubuntu is available for some of
> their notebook computers they do not seem to provide any way to
> actually configure a system with it.
> 
> So, my desires are:
> 
> WANT:
> 
> Robust construction
> Reliable quality
> Reasonable weight (< 2.5 kg all in)
> Supported sound and video reproduction of reasonable quality
> 15-17" lcd screen
> Out-of-the-box support for wireless networking
> Battery life > 2.0 hrs.
> Not MS-Windows
> 
> PREFER:
> 
> 64 bit
> core duo 2
> 2-4+ Gb RAM
> 120+ Gb HDD
> writable multi-mode DVD/CD drive
> CentOS-5+
> 
> Your system suggestions, both for hardware and OS, are most welcome.
> 
I'm not really into the whole laptop market scene my self, so I'm not
going to suggest any hardware. However, I do wonder, why you don't
simply buy a laptop that suits your needs, then simply wipe the OS off?
(If it was the evil that is MS on it)

Though it may get price changes (Due to MS Tax), but sometimes I find in
laptops the price tax isn't all that high any more.

For example, you could get choose a Windoze machine, but before buying,
look into the technical details, then Google the parts to see what will
work and what won't and if need be, choose another :-).

As for OS Choice, my personal preferences are:

Absolutely needs reliability (Such as Server): CentOS/RHEL
General Use (Such as Standard PC): Fedora (Latest, upgrade as soon as
new one is out)

I've never used Mac OSX so I have no comments with it :-)

Just my 2c :-)

-- 
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[CentOS] Best way to hold at 5.3 release

[Joseph L. Casale]

I need to do some testing with 5.3 as its suggested that 5.4 has
"some bugs in the toolchain and libc". That being the case, I can
install with a url and repo line pointing to a mirror with 5.3 still
but how does one properly make sure during subsequent uses of yum it
doesn't attempt to use 5.4 rpms?

Is it simple enough to just manually set '$releasever' to 5.3 in the
repo file or do I need to do anything else?

What actually happens to the 5.3 repo so that `yum update` actually
switches repo's when one is available? 

Thanks!
jlc

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Re: [CentOS] Laptop for CentOS-5

[James Szinger]

On Thu, Jan 7, 2010 at 11:37 AM, James B. Byrne  wrote:
> So, my desires are:
>
> WANT:
>
> Robust construction
> Reliable quality
> Reasonable weight (< 2.5 kg all in)
> Supported sound and video reproduction of reasonable quality
> 15-17" lcd screen
> Out-of-the-box support for wireless networking
> Battery life > 2.0 hrs.
> Not MS-Windows
>
> PREFER:
>
> 64 bit
> core duo 2
> 2-4+ Gb RAM
> 120+ Gb HDD
> writable multi-mode DVD/CD drive
> CentOS-5+
>
> Your system suggestions, both for hardware and OS, are most welcome.

I'm writing this on a ThinkPad T61 (used), which meets all your
requirements.  I'm
running Fedora 12 for a couple of reasons:  NetworkManager and power
managment have matured a lot since F6/CentOS 5.   Also, the current
generation mulitmedia apps are easier to install on F12.  All the hardware was
recognized and supported out of the box.  I haven't tried CentOS on it, but it
should also work. (I'm hoping for CentOS 6 within the next year so I won't have
to reinstall fedora too often).

Previously, I was using CentOS 5.4 on a ThinkPad A20 (500MHz 512MB), which
was useable, but slow.

The website thinkwiki.org is a good resource for those looking to run Linix on a
ThinkPad.

You might also search for service manual for the laptop.  That will tell you
whether the manufacurer think it is serviceable.

A MacBook is another idea. They have genuine UNIX, better than average sound,
a well-integrated system, no Windows.

Jim
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Re: [CentOS] 8-15 TB storage: any recommendations?

[Christopher Chan]

> cause when I did - the x45xx's/zfs were between 18 to 20% slower on disk 
> i/o alone compared with a supermicro box with dual areca 1220/xfs.
> 
> the thumpers make for decent backup or vtl type roles, not so much for 
> online high density storage.


Speaking of thumpers and Supermicro, it looks like Supermicro has a very 
close answer to the thumper.

http://www.supermicro.com/storage/

The SC847 has an existing configuration that goes up to 36disks and 
another that will go up to 45 in 4U of space although the 45 disk case 
does not seem to have a page just yet.
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Re: [CentOS] [OT] 8-15 TB storage: any recommendations?

[Karanbir Singh]

On 01/07/2010 05:28 PM, Joseph L. Casale wrote:
> An often overlooked issue is the rebuild time with Linux software raid and
> all hw raid controllers I have seen. On large drives the times are so long
> as a result of the sheer size, if the array is degraded you are exposed during
> the rebuild.

As a point of reference: On a SIL3512 SATA interface, mdraid raid1, 2 x 
1 TB disks take just under 6 hrs to resync with moderate load ( this 
machine is a mailserver off a 5mbps link to the internet, and rarely 
hits > 0.3 load with just usage.

same machine with zero load and the mdadm resync rate bumped to 
80K/sec, it takes just over 3 hrs 42 min. But dont expect to be able 
to do anything with the machine during this time.

( I've just done these two syncs today! )

Disks are all : SAMSUNG HD103UJ , and are at 83% data space used of 
total capacity.

- KB
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Re: [CentOS] 8-15 TB storage: any recommendations?

[Christopher Chan]

Karanbir Singh wrote:
> On 01/08/2010 12:53 AM, John R Pierce wrote:
>> Christopher Chan wrote:
>>> Yes, the Sun Fire X4540 uses software raid but not necessarily zfs...if
>>> you install another operating system that is not Solaris or OpenSolaris,
>>> it won't be zfs.
>>>
>> the thing to note on the Thumper (X4540), each of those 48 SATA drives
>> has its own channel to the system bus.  I believe it uses 6 8-port SATA
>> controllers, each attached to the Opteron's Hypertransport via
>> PCI-Express x4.this means you can hit some really high aggregate IO
>> speeds...
> 
> have you actually tried it ?
> 
> cause when I did - the x45xx's/zfs were between 18 to 20% slower on disk 
> i/o alone compared with a supermicro box with dual areca 1220/xfs.

I'd imagine that a x4540 setup as md nested raid1+0 should give the dual 
Areca a run for its money (okay...not quite in real money terms but you 
get the idea) and I wonder what zfs would be like on a dual Areca 1220 box.

> 
> the thumpers make for decent backup or vtl type roles, not so much for 
> online high density storage.


I wonder how much that would change with a bbu NVRAM card for an 
external journal for ext4 and the disks on md. Unless one cannot add a 
bbu NVRAM card...
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Re: [CentOS] 8-15 TB storage: any recommendations?

[Karanbir Singh]

On 01/08/2010 12:53 AM, John R Pierce wrote:
> Christopher Chan wrote:
>> Yes, the Sun Fire X4540 uses software raid but not necessarily zfs...if
>> you install another operating system that is not Solaris or OpenSolaris,
>> it won't be zfs.
>>
>
> the thing to note on the Thumper (X4540), each of those 48 SATA drives
> has its own channel to the system bus.  I believe it uses 6 8-port SATA
> controllers, each attached to the Opteron's Hypertransport via
> PCI-Express x4.this means you can hit some really high aggregate IO
> speeds...

have you actually tried it ?

cause when I did - the x45xx's/zfs were between 18 to 20% slower on disk 
i/o alone compared with a supermicro box with dual areca 1220/xfs.

the thumpers make for decent backup or vtl type roles, not so much for 
online high density storage.

- KB
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Re: [CentOS] 8-15 TB storage: any recommendations?

[Karanbir Singh]

On 01/08/2010 01:01 AM, Christopher Chan wrote:
>> That puts you right on the edge of workability with 32-bit hardware.
>> ext3's limit on 32-bit is 8 TB, and you can push it to 16 TB by
>> switching to XFS or JFS.  Best to use 64-bit hardware if you can.
>
> Probably XFS if you want data guarantees on anything that is not a
> hardware raid card with bbu cache since JFS does not support barriers yet.


and lets not forget the presence of ext4 in C5

- KB
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Re: [CentOS] 8-15 TB storage: any recommendations?

[Christopher Chan]

Warren Young wrote:
> On 1/6/2010 2:35 PM, Boris Epstein wrote:
>> we are trying to set
>> up some storage servers to run under Linux
> 
> You should also consider FreeBSD 8.0, which has the newest version of 
> ZFS up and running stably on it.  I use Linux for most server tasks, but 
> for big storage, Linux just doesn't have anything like this yet.


http://security.freebsd.org/advisories/FreeBSD-SA-10:03.zfs.asc

Nothing really big but it does kinda leave doubts...interesting that 
FreeBSD has absorbed pf and zfs and now claims to be twice as fast as 
Linux for mysql/postgresql workloads. Certainly sounds very different 
from the FreeBSD 4.4 that I knew.

FreeBSD may now have ZFS support but it does not look quite the same as 
it does on Solaris/OpenSolaris.

> 
> I'm not recommending OpenSolaris on purpose.  For the last few years, it 
> was the only stable production-quality implementation of ZFS, but with 
> FreeBSD 8.0, it just lost that advantage.  I think, as a Linux fan, you 
> will be happier with FreeBSD than OpenSolaris.

Serious system administrators are not Linux fans I don't think. I tend 
to want to use the right tool for the job like OpenBSD for firewalling 
for example. I don't know about you but I find pkg on OpenSolaris to be 
more akin to yum or apt than ports and then there is always nexenta if I 
really want a complete GNU userland and apt/dpkg. I could not find out 
much are ZFS on FreeBSD. Its  man page is just a copy of the Solaris 
one. Does it support direct sharing/exporting as nfs/cifs/iscsi like it 
does on Solaris/OpenSolaris? Does it support using ZFS for booting and 
boot environments and a related upgrade system?

Nice that FreeBSD has improved its zfs support, I remember one person 
dissing zfs and pointing to vinum as an alternative but then maybe he 
did not know what he was talking about. However, there certainly is a 
lot more on vinum than there is on zfs in the FreeBSD manual.

> 
>> storage volume would be in the range specified: 8-15 TB.
> 
> That puts you right on the edge of workability with 32-bit hardware. 
> ext3's limit on 32-bit is 8 TB, and you can push it to 16 TB by 
> switching to XFS or JFS.  Best to use 64-bit hardware if you can.

Probably XFS if you want data guarantees on anything that is not a 
hardware raid card with bbu cache since JFS does not support barriers yet.
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Re: [CentOS] 8-15 TB storage: any recommendations?

[John R Pierce]

Christopher Chan wrote:
> Yes, the Sun Fire X4540 uses software raid but not necessarily zfs...if 
> you install another operating system that is not Solaris or OpenSolaris, 
> it won't be zfs.
>   

the thing to note on the Thumper (X4540), each of those 48 SATA drives 
has its own channel to the system bus.  I believe it uses 6 8-port SATA 
controllers, each attached to the Opteron's Hypertransport via 
PCI-Express x4.this means you can hit some really high aggregate IO 
speeds...


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Re: [CentOS] 8-15 TB storage: any recommendations?

[Christopher Chan]

John Doe wrote:
> Yes, the Sun Fire Xs are costly...
> Here, 35k euros for 48 x 1TB by example, or 22k for 48 x 500GB...
> Our 12TB HP is around 6k.  So 12k for almost the same as the 22k
> But if you use 1TB disks on the Sun, you end up using half the Us (and save 
> some power) in your bay; which might be nice if you are tight on physical 
> space...
> It all depends on your needs.
> Note that I think the Sun Fire X uses software RAID (from zfs)...
> 

Yes, the Sun Fire X4540 uses software raid but not necessarily zfs...if 
you install another operating system that is not Solaris or OpenSolaris, 
it won't be zfs.
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Re: [CentOS] Laptop for CentOS-5

[Geerd-Dietger Hoffmann]

Hey

On Thu, Jan 7, 2010 at 6:37 PM, James B. Byrne  wrote:
>
> WANT:
>
> Robust construction
> Reliable quality
> Reasonable weight (< 2.5 kg all in)
> Supported sound and video reproduction of reasonable quality
> 15-17" lcd screen
> Out-of-the-box support for wireless networking
> Battery life > 2.0 hrs.
> Not MS-Windows

If you can take a little smaller screen you might think about getting
a IBM X301. I love mine to bits. It is a really good piece of kit. A
little pricey but you pay for quality. I really USE my laptops and
never had a problem with a Think Pad (X series)

>
> PREFER:
>
> 64 bit
> core duo 2
> 2-4+ Gb RAM
> 120+ Gb HDD
> writable multi-mode DVD/CD drive
> CentOS-5+

Works pretty much out of the box with CentOS 5. rpmforge has the rest.
Full install took me less then 2 hours.

-- 

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Email / Jabber: riba...@gmail.com
Skype : ribalba
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Re: [CentOS] Mplayer and VDPAU

[Ralph Angenendt]

Am 07.01.10 20:43, schrieb fred smith:
> On Thu, Jan 07, 2010 at 03:10:59PM +0100, Ralph Angenendt wrote:
>>> Yes, tried that. it doesn't list vdpau. however "strings mplayer |
>>> grep -y vdpau" turns up a number of instances of vdpau.
>>
>> Um, yes. But:
>>
>> [ra...@reboot ~]$ mplayer -vo help|grep vdpau
>> vdpau   VDPAU with X11
>> [ra...@reboot ~]$
> 
> Yeah. mine doesn't. are you using a pre-built mplayer from somewhere,
> or one you compiled yourself? I have this one:

Hmmm. That is on fedora and the mplayer is from rpmfusion. No idea if
they have one for CentOS.

Ralph

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Re: [CentOS] Laptop for CentOS-5

[Alain Portal]

Le jeudi 07 janvier 2010 19:37:46, James B. Byrne a écrit :
> PREFER:
> 
> 64 bit
> core duo 2
> 2-4+ Gb RAM
> 120+ Gb HDD
> writable multi-mode DVD/CD drive
> CentOS-5+
> 
> Your system suggestions, both for hardware and OS, are most welcome.

Not a Panasonic CF-52 :-(
https://bugzilla.redhat.com/show_bug.cgi?id=477708

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Re: [CentOS] Laptop for CentOS-5

[MHR]

On Thu, Jan 7, 2010 at 10:37 AM, James B. Byrne  wrote:
> I have a defective HP-Compaq nx9420 and so I am looking to replace
> it.  I have pretty much decided to buy no further MicroSoft based
> products and would very much like to hear recommendations for a
> suitable notebook host to provide me with Linux based alternative.
>

I have an Everex StepNote laptop that works fine with CentOS (came
with Ubuntu, but I don't like that), but I would not recommend any
Everex computers to anyone.  For one thing, the company is out of
business, so all warranties are DOA.  My laptop works fine, so far,
except that the headset plug for earphones (and, hence, extension
speakers) does not work.  I'm not in a financial position to get it
repaired, so I have a fine, multimedia capable laptop with a crappy,
mono speaker that sounds like most laptop speakers - tinny and crappy.

Aside from that,

mhr
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Re: [CentOS] centos 5.4 :: linux-2.6.32.2 compile error (via nano l2...@1600)

[Adrian Sevcenco]

Kay Diederichs wrote:
> Karanbir Singh schrieb:
>> On 01/07/2010 11:36 AM, Ned Slider wrote:
>>> Depends what hardware you have. ELRepo has a fixed powernow-k8 driver
>>> for AMD processors that allows correct scaling on multicore processors.
>>> See here:
>> OP has a VIA nano, the K8 stuff isnt going to work there.
>>
>> I wonder if its possible to manually set clockrate.
>>
>> - KB
> 
> the OP's posting had the hint
> 
>> The bug is not reproducible, so it is likely a hardware or OS problem.
> 
> To rule out a hardware problem it would be good to try the compilation
> with e.g. Fedora 12 (run from LiveCD or USB stick).
k thx!

> I did not look at the config, but I had good results with the 2.6.31
> kernel compiled on CentOS 5.4 with the Fedora 12 config (but that was on
> x86_64 so YMMV).
this is also on x86_64 .. well, nevermind, i just tried a compile with
original config-2.6.18-164.9.1.el5 and it worked .. that means that i
was over zealous in configuration :D ;)

Thanks for advices,
Adrian


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Re: [CentOS] 8-15 TB storage: any recommendations?

[Warren Young]

On 1/6/2010 2:35 PM, Boris Epstein wrote:
>
> we are trying to set
> up some storage servers to run under Linux

You should also consider FreeBSD 8.0, which has the newest version of 
ZFS up and running stably on it.  I use Linux for most server tasks, but 
for big storage, Linux just doesn't have anything like this yet.

Yeah, yeah, btrfs someday, I know.  But today, ZFS is where it's at. 
It's the easiest way of managing large pools of storage I know of short 
of a Drobo, and Drobos have big problems of their own.

I'm not recommending OpenSolaris on purpose.  For the last few years, it 
was the only stable production-quality implementation of ZFS, but with 
FreeBSD 8.0, it just lost that advantage.  I think, as a Linux fan, you 
will be happier with FreeBSD than OpenSolaris.

> storage volume would be in the range specified: 8-15 TB.

That puts you right on the edge of workability with 32-bit hardware. 
ext3's limit on 32-bit is 8 TB, and you can push it to 16 TB by 
switching to XFS or JFS.  Best to use 64-bit hardware if you can.
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Re: [CentOS] Laptop for CentOS-5

[Robert Heller]

At Thu, 7 Jan 2010 14:49:40 -0500 CentOS mailing list  wrote:

> 
> On Thu, Jan 7, 2010 at 2:39 PM, Les Mikesell  wrote:
> > On 1/7/2010 1:14 PM, Robert Heller wrote:
> >>
> >> Low-end (read: cheap) Dell laptops tend to be junk.  Dell is somewhat
> >> between a rock and a hard place WRT selling computers with an O/S
> >> *other* then MS-Windows, due to M$ OEM licensing.  Also, Dell (and other
> >> makers) have had troubles with people chosing the *cheaper* Ubuntu
> >> computers only to discover that MS-Windows software not working on them
> >> and returning them as 'defective' (this is probably a mis-information
> >> issue by the marketing people).
> >
> > I don't think the return issue is actually true:
> > http://www.theregister.co.uk/2009/08/12/dell_reality_linux_windows_netbooks/
> 
> I'd agree though that the low-end Dells have quality issues. Though I
> haven't returned any of the five or so Inspirons that I've purchased,
> all of them have had issues that required in-warranty repair. These
> range from physical sound issues, hinges popping open, unequal LCD
> illumination, and DVD Reader failures. The two XPSs I own have been
> rock solid, however.  The Inspirons run CentOS well though.

Just about all of the low-end Dell boxes (laptops or desktops) tend to
be low-quality boxes -- you gets what you pay for.  Higher end Dells
seem to be OK (eg 'Workstations', servers, etc.).  

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Re: [CentOS] Laptop for CentOS-5

[Roger K. Wells]

Roger K. Wells wrote:
> Eero Volotinen wrote:
>   
>> On 1/7/10 8:55 PM, Eero Volotinen wrote:
>>   
>> 
>>> On 1/7/10 8:37 PM, James B. Byrne wrote:
>>> 
>>>   
 I have a defective HP-Compaq nx9420 and so I am looking to replace
 it.  I have pretty much decided to buy no further MicroSoft based
 products and would very much like to hear recommendations for a
 suitable notebook host to provide me with Linux based alternative.

 Given that all the basic functionality required is provided, the
 main thing that I am looking for is reliability of the host itself.
 I do a deal of traveling so physical robustness is an issue.  But I
 also use my notebook for hours at a time, generally every day. This
 means that I am typically on a/c current rather than batteries and
 that power regulation and heat dissipation are also concerns.  The
 power regulator circuit is in fact what I believe has failed on the
 nx9420.

 Not infrequently I have the notebook on my chest or lap while
 working at home.  So the ventilation clearances provided by a flat
 desk support are frequently absent and the notebook design must
 accommodate this.

 I would like to use CentOs as this is what I am most familiar with.
 But, I am open to CentOS alternatives like Ubuntu or even a
 non-Linux alternative like a PowerMac with OS-X.

 I have already looked at the Dell site on the basis of a friends
 recommendation. While Dell mentions Ubuntu is available for some of
 their notebook computers they do not seem to provide any way to
 actually configure a system with it.

 So, my desires are:

 WANT:

 Robust construction
 Reliable quality
 Reasonable weight (<   2.5 kg all in)
 Supported sound and video reproduction of reasonable quality
 15-17" lcd screen
 Out-of-the-box support for wireless networking
 Battery life>   2.0 hrs.
 Not MS-Windows

 PREFER:

 64 bit
 core duo 2
 2-4+ Gb RAM
 120+ Gb HDD
 writable multi-mode DVD/CD drive
 CentOS-5+

 Your system suggestions, both for hardware and OS, are most welcome.
   
 
>>> How about Thinkpad W500 ? It is a bit expensive, but .. with UBuntu or
>>> OpenSUSE os.
>>> 
>>>   
>> Also Dell (http://www.emperorlinux.com/mfgr/dell/rhino/)
>> E6500 / M6400 is good solution.
>>
>> --
>> Eero
>>   
>> 
> FWIW
> I am using CentOS 5.4 x86-64 on a Thinkpad X200 and 32 bit on a Thinkpad 
> A31.
> Until recently I was using CentOS 5.3/4 32bit on a Thinkpad x31.
> All have been/are very reliable and are used 8-10 hrs per day in software
> development.
> I too prefer this environment to Windows.
> roger wells
>
>   
perhaps I should have mentioned:

   1. Wireless works on all three
   2. Battery life on X200 exceeds 2 hours
   3. X200 is Intel core duo 2, 4 Gb RAM, 250Gb encrypted HD.
   4. X200 OS is 2.6.18-164.9.1.el5.centos.plus #1 SMP Wed Dec 16
  11:24:24 EST 2009 x86_64 x86_64 x86_64 GNU/Linux
   5. X200 is new in August, A31, X31 are a few years old
   6. I use a LG USB DVD burner for X200 & X31 (X31 is now WXP again)

rkw
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>> 
>
>
>   


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401-849-1585 (fax)
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Re: [CentOS] Laptop for CentOS-5

[Les Mikesell]

On 1/7/2010 1:49 PM, Kwan Lowe wrote:
> On Thu, Jan 7, 2010 at 2:39 PM, Les Mikesell  wrote:
>> On 1/7/2010 1:14 PM, Robert Heller wrote:
>>>
>>> Low-end (read: cheap) Dell laptops tend to be junk.  Dell is somewhat
>>> between a rock and a hard place WRT selling computers with an O/S
>>> *other* then MS-Windows, due to M$ OEM licensing.  Also, Dell (and other
>>> makers) have had troubles with people chosing the *cheaper* Ubuntu
>>> computers only to discover that MS-Windows software not working on them
>>> and returning them as 'defective' (this is probably a mis-information
>>> issue by the marketing people).
>>
>> I don't think the return issue is actually true:
>> http://www.theregister.co.uk/2009/08/12/dell_reality_linux_windows_netbooks/
>
> I'd agree though that the low-end Dells have quality issues. Though I
> haven't returned any of the five or so Inspirons that I've purchased,
> all of them have had issues that required in-warranty repair. These
> range from physical sound issues, hinges popping open, unequal LCD
> illumination, and DVD Reader failures. The two XPSs I own have been
> rock solid, however.  The Inspirons run CentOS well though.

I've always thought the Latitude line was a lot more reliable than the 
Inspirons.  I carried a D600 everywhere for years, then a D630 more 
recently with no problems with either, but they have just changed the 
whole series.  I have Windows/Ubuntu dual-booting on the D630 only 
because Centos 5.0 didn't work with the wifi - but the current version 
might.

-- 
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lesmikes...@gmail.com
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Re: [CentOS] Laptop for CentOS-5

[Kwan Lowe]

On Thu, Jan 7, 2010 at 2:39 PM, Les Mikesell  wrote:
> On 1/7/2010 1:14 PM, Robert Heller wrote:
>>
>> Low-end (read: cheap) Dell laptops tend to be junk.  Dell is somewhat
>> between a rock and a hard place WRT selling computers with an O/S
>> *other* then MS-Windows, due to M$ OEM licensing.  Also, Dell (and other
>> makers) have had troubles with people chosing the *cheaper* Ubuntu
>> computers only to discover that MS-Windows software not working on them
>> and returning them as 'defective' (this is probably a mis-information
>> issue by the marketing people).
>
> I don't think the return issue is actually true:
> http://www.theregister.co.uk/2009/08/12/dell_reality_linux_windows_netbooks/

I'd agree though that the low-end Dells have quality issues. Though I
haven't returned any of the five or so Inspirons that I've purchased,
all of them have had issues that required in-warranty repair. These
range from physical sound issues, hinges popping open, unequal LCD
illumination, and DVD Reader failures. The two XPSs I own have been
rock solid, however.  The Inspirons run CentOS well though.
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Re: [CentOS] Mplayer and VDPAU

[fred smith]

On Thu, Jan 07, 2010 at 03:10:59PM +0100, Ralph Angenendt wrote:
> > Yes, tried that. it doesn't list vdpau. however "strings mplayer |
> > grep -y vdpau" turns up a number of instances of vdpau.
> 
> Um, yes. But:
> 
> [ra...@reboot ~]$ mplayer -vo help|grep vdpau
> vdpau   VDPAU with X11
> [ra...@reboot ~]$

Yeah. mine doesn't. are you using a pre-built mplayer from somewhere,
or one you compiled yourself? I have this one:

# rpm -qa | grep -y mplayer
mplayer-fonts-1.1-3.0.rf
mplayer-codecs-20061022-1
mplayer-1.0-0.41.svn20090711.el5.rf
mplayer-codecs-extra-20061022-1
mplayerplug-in-3.55-1.el5.rf


-- 
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   But God demonstrates his own love for us in this: 
 While we were still sinners, 
  Christ died for us.
--- Romans 5:8 (niv) --
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Re: [CentOS] Laptop for CentOS-5

[Eero Volotinen]

>
> Another alternitive is an older model IBM Thinkpad -- they have
> *Intel's* wireless adapters built-in -- Intel's wireless adaptors are
> the most painless wireless adapters in existence since they are
> supported by an open-source driver that is included with the base
> kernel distro.  Almost all others require all sorts of fun and games to
> get working under Linux.

I think that Thinkpad W-series is the best of Linux laptops, it is still 
sad that they are using ati card instead of nvidia.

My work computer is fujitsu-siemens celsius H250, it is very good but 
build quality is poor ..

Usually this kind of laptops can take up to 8GB of main memory.

--
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Re: [CentOS] Laptop for CentOS-5

[Les Mikesell]

On 1/7/2010 1:14 PM, Robert Heller wrote:
>
> Low-end (read: cheap) Dell laptops tend to be junk.  Dell is somewhat
> between a rock and a hard place WRT selling computers with an O/S
> *other* then MS-Windows, due to M$ OEM licensing.  Also, Dell (and other
> makers) have had troubles with people chosing the *cheaper* Ubuntu
> computers only to discover that MS-Windows software not working on them
> and returning them as 'defective' (this is probably a mis-information
> issue by the marketing people).

I don't think the return issue is actually true:
http://www.theregister.co.uk/2009/08/12/dell_reality_linux_windows_netbooks/

-- 
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lesmikes...@gmail.com
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Re: [CentOS] Laptop for CentOS-5

[Roger K. Wells]

Eero Volotinen wrote:
> On 1/7/10 8:55 PM, Eero Volotinen wrote:
>   
>> On 1/7/10 8:37 PM, James B. Byrne wrote:
>> 
>>> I have a defective HP-Compaq nx9420 and so I am looking to replace
>>> it.  I have pretty much decided to buy no further MicroSoft based
>>> products and would very much like to hear recommendations for a
>>> suitable notebook host to provide me with Linux based alternative.
>>>
>>> Given that all the basic functionality required is provided, the
>>> main thing that I am looking for is reliability of the host itself.
>>> I do a deal of traveling so physical robustness is an issue.  But I
>>> also use my notebook for hours at a time, generally every day. This
>>> means that I am typically on a/c current rather than batteries and
>>> that power regulation and heat dissipation are also concerns.  The
>>> power regulator circuit is in fact what I believe has failed on the
>>> nx9420.
>>>
>>> Not infrequently I have the notebook on my chest or lap while
>>> working at home.  So the ventilation clearances provided by a flat
>>> desk support are frequently absent and the notebook design must
>>> accommodate this.
>>>
>>> I would like to use CentOs as this is what I am most familiar with.
>>> But, I am open to CentOS alternatives like Ubuntu or even a
>>> non-Linux alternative like a PowerMac with OS-X.
>>>
>>> I have already looked at the Dell site on the basis of a friends
>>> recommendation. While Dell mentions Ubuntu is available for some of
>>> their notebook computers they do not seem to provide any way to
>>> actually configure a system with it.
>>>
>>> So, my desires are:
>>>
>>> WANT:
>>>
>>> Robust construction
>>> Reliable quality
>>> Reasonable weight (<   2.5 kg all in)
>>> Supported sound and video reproduction of reasonable quality
>>> 15-17" lcd screen
>>> Out-of-the-box support for wireless networking
>>> Battery life>   2.0 hrs.
>>> Not MS-Windows
>>>
>>> PREFER:
>>>
>>> 64 bit
>>> core duo 2
>>> 2-4+ Gb RAM
>>> 120+ Gb HDD
>>> writable multi-mode DVD/CD drive
>>> CentOS-5+
>>>
>>> Your system suggestions, both for hardware and OS, are most welcome.
>>>   
>> How about Thinkpad W500 ? It is a bit expensive, but .. with UBuntu or
>> OpenSUSE os.
>> 
>
> Also Dell (http://www.emperorlinux.com/mfgr/dell/rhino/)
> E6500 / M6400 is good solution.
>
> --
> Eero
>   
FWIW
I am using CentOS 5.4 x86-64 on a Thinkpad X200 and 32 bit on a Thinkpad 
A31.
Until recently I was using CentOS 5.3/4 32bit on a Thinkpad x31.
All have been/are very reliable and are used 8-10 hrs per day in software
development.
I too prefer this environment to Windows.
roger wells

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>   


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SAIC
221 Third St
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401-849-1585 (fax)
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Re: [CentOS] Laptop for CentOS-5

[Robert Heller]

At Thu, 7 Jan 2010 13:37:46 -0500 (EST) CentOS mailing list  
wrote:

> 
> I have a defective HP-Compaq nx9420 and so I am looking to replace
> it.  I have pretty much decided to buy no further MicroSoft based
> products and would very much like to hear recommendations for a
> suitable notebook host to provide me with Linux based alternative.
> 
> Given that all the basic functionality required is provided, the
> main thing that I am looking for is reliability of the host itself. 
> I do a deal of traveling so physical robustness is an issue.  But I
> also use my notebook for hours at a time, generally every day. This
> means that I am typically on a/c current rather than batteries and
> that power regulation and heat dissipation are also concerns.  The
> power regulator circuit is in fact what I believe has failed on the
> nx9420.
> 
> Not infrequently I have the notebook on my chest or lap while
> working at home.  So the ventilation clearances provided by a flat
> desk support are frequently absent and the notebook design must
> accommodate this.
> 
> I would like to use CentOs as this is what I am most familiar with. 
> But, I am open to CentOS alternatives like Ubuntu or even a
> non-Linux alternative like a PowerMac with OS-X.
> 
> I have already looked at the Dell site on the basis of a friends
> recommendation. While Dell mentions Ubuntu is available for some of
> their notebook computers they do not seem to provide any way to
> actually configure a system with it.

Low-end (read: cheap) Dell laptops tend to be junk.  Dell is somewhat
between a rock and a hard place WRT selling computers with an O/S
*other* then MS-Windows, due to M$ OEM licensing.  Also, Dell (and other
makers) have had troubles with people chosing the *cheaper* Ubuntu
computers only to discover that MS-Windows software not working on them
and returning them as 'defective' (this is probably a mis-information
issue by the marketing people).  You may have to call Dell up and work
you way through the phone sales idiots to get what you want.

Another alternitive is an older model IBM Thinkpad -- they have
*Intel's* wireless adapters built-in -- Intel's wireless adaptors are
the most painless wireless adapters in existence since they are
supported by an open-source driver that is included with the base
kernel distro.  Almost all others require all sorts of fun and games to
get working under Linux.

> 
> So, my desires are:
> 
> WANT:
> 
> Robust construction
> Reliable quality
> Reasonable weight (< 2.5 kg all in)
> Supported sound and video reproduction of reasonable quality
> 15-17" lcd screen
> Out-of-the-box support for wireless networking
> Battery life > 2.0 hrs.
> Not MS-Windows

I have an (old) IBM Thinkpad X25 and it works great (yes, it is older).

Unless you buy a used laptop, you will pay the Microsoft Tax.  It is almost
impossible to buy a *new* laptop with anything other than MS-Windows
pre-installed (unless you buy a MacBook).

> 
> PREFER:
> 
> 64 bit
> core duo 2
> 2-4+ Gb RAM
> 120+ Gb HDD
> writable multi-mode DVD/CD drive
> CentOS-5+

OK, my IBM Thinkpad X25 has a 1.4ghz P4 (32-bit), will support up to
1gig of RAM, as big an *IDE* hard drive (I believe 160gig drives are
available), but has no DVD/CD drive (I have a 40gig drive in it
presently). I'm presently running CentOS 4.8, but plan on upgrading to
CentOS 5.4 soon.

Note: "64 bit, core duo 2, 2-4+ Gb RAM, and writable multi-mode DVD/CD
drive" are somewhat counter indicated with "Reasonable weight (< 2.5 kg
all in), Battery life > 2.0 hrs.".  You will need to make a trade off
here (i.e. the extra 'goodies' will mean more weight and/or less battery
life). 

Another note: unless you are doing something like s...@home, you *don't
really need* a multi-core processor.  99% of desktop applications are
single threaded (and there is no point in multi-threading them).  Only
Firefox is 'multi-threaded', but the extra threads are all I/O bound
most of the time (mostly downloading content, which is bad news on a
dialup connection...[wishing a single-threaded version of Firefox
existed]).  (Multi-core processors draw more power than a single core
processor and need more cooling...)


> 
> Your system suggestions, both for hardware and OS, are most welcome.
> 

-- 
Robert Heller -- 978-544-6933
Deepwoods Software-- Download the Model Railroad System
http://www.deepsoft.com/  -- Binaries for Linux and MS-Windows
hel...@deepsoft.com   -- http://www.deepsoft.com/ModelRailroadSystem/
   
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Re: [CentOS] CentOS 5.4 x86_64 and HPLIP-3.9.12

[gene . poole]

All,

I did contact the HP Launchpad site and receive instructions to re-install 
their driver with some changes I hadn't done.  I plan on attempting that 
this evening and I'll reply tomorrow and let everyone know how it went.

Thanks,
Gene Poole
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Re: [CentOS] Laptop for CentOS-5

[Eero Volotinen]

On 1/7/10 8:55 PM, Eero Volotinen wrote:
> On 1/7/10 8:37 PM, James B. Byrne wrote:
>> I have a defective HP-Compaq nx9420 and so I am looking to replace
>> it.  I have pretty much decided to buy no further MicroSoft based
>> products and would very much like to hear recommendations for a
>> suitable notebook host to provide me with Linux based alternative.
>>
>> Given that all the basic functionality required is provided, the
>> main thing that I am looking for is reliability of the host itself.
>> I do a deal of traveling so physical robustness is an issue.  But I
>> also use my notebook for hours at a time, generally every day. This
>> means that I am typically on a/c current rather than batteries and
>> that power regulation and heat dissipation are also concerns.  The
>> power regulator circuit is in fact what I believe has failed on the
>> nx9420.
>>
>> Not infrequently I have the notebook on my chest or lap while
>> working at home.  So the ventilation clearances provided by a flat
>> desk support are frequently absent and the notebook design must
>> accommodate this.
>>
>> I would like to use CentOs as this is what I am most familiar with.
>> But, I am open to CentOS alternatives like Ubuntu or even a
>> non-Linux alternative like a PowerMac with OS-X.
>>
>> I have already looked at the Dell site on the basis of a friends
>> recommendation. While Dell mentions Ubuntu is available for some of
>> their notebook computers they do not seem to provide any way to
>> actually configure a system with it.
>>
>> So, my desires are:
>>
>> WANT:
>>
>> Robust construction
>> Reliable quality
>> Reasonable weight (<   2.5 kg all in)
>> Supported sound and video reproduction of reasonable quality
>> 15-17" lcd screen
>> Out-of-the-box support for wireless networking
>> Battery life>   2.0 hrs.
>> Not MS-Windows
>>
>> PREFER:
>>
>> 64 bit
>> core duo 2
>> 2-4+ Gb RAM
>> 120+ Gb HDD
>> writable multi-mode DVD/CD drive
>> CentOS-5+
>>
>> Your system suggestions, both for hardware and OS, are most welcome.
>
> How about Thinkpad W500 ? It is a bit expensive, but .. with UBuntu or
> OpenSUSE os.

Also Dell (http://www.emperorlinux.com/mfgr/dell/rhino/)
E6500 / M6400 is good solution.

--
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Re: [CentOS] Laptop for CentOS-5

[Eero Volotinen]

On 1/7/10 8:37 PM, James B. Byrne wrote:
> I have a defective HP-Compaq nx9420 and so I am looking to replace
> it.  I have pretty much decided to buy no further MicroSoft based
> products and would very much like to hear recommendations for a
> suitable notebook host to provide me with Linux based alternative.
>
> Given that all the basic functionality required is provided, the
> main thing that I am looking for is reliability of the host itself.
> I do a deal of traveling so physical robustness is an issue.  But I
> also use my notebook for hours at a time, generally every day. This
> means that I am typically on a/c current rather than batteries and
> that power regulation and heat dissipation are also concerns.  The
> power regulator circuit is in fact what I believe has failed on the
> nx9420.
>
> Not infrequently I have the notebook on my chest or lap while
> working at home.  So the ventilation clearances provided by a flat
> desk support are frequently absent and the notebook design must
> accommodate this.
>
> I would like to use CentOs as this is what I am most familiar with.
> But, I am open to CentOS alternatives like Ubuntu or even a
> non-Linux alternative like a PowerMac with OS-X.
>
> I have already looked at the Dell site on the basis of a friends
> recommendation. While Dell mentions Ubuntu is available for some of
> their notebook computers they do not seem to provide any way to
> actually configure a system with it.
>
> So, my desires are:
>
> WANT:
>
> Robust construction
> Reliable quality
> Reasonable weight (<  2.5 kg all in)
> Supported sound and video reproduction of reasonable quality
> 15-17" lcd screen
> Out-of-the-box support for wireless networking
> Battery life>  2.0 hrs.
> Not MS-Windows
>
> PREFER:
>
> 64 bit
> core duo 2
> 2-4+ Gb RAM
> 120+ Gb HDD
> writable multi-mode DVD/CD drive
> CentOS-5+
>
> Your system suggestions, both for hardware and OS, are most welcome.

How about Thinkpad W500 ? It is a bit expensive, but .. with UBuntu or 
OpenSUSE os.

--
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[CentOS] Laptop for CentOS-5

[James B. Byrne]

I have a defective HP-Compaq nx9420 and so I am looking to replace
it.  I have pretty much decided to buy no further MicroSoft based
products and would very much like to hear recommendations for a
suitable notebook host to provide me with Linux based alternative.

Given that all the basic functionality required is provided, the
main thing that I am looking for is reliability of the host itself. 
I do a deal of traveling so physical robustness is an issue.  But I
also use my notebook for hours at a time, generally every day. This
means that I am typically on a/c current rather than batteries and
that power regulation and heat dissipation are also concerns.  The
power regulator circuit is in fact what I believe has failed on the
nx9420.

Not infrequently I have the notebook on my chest or lap while
working at home.  So the ventilation clearances provided by a flat
desk support are frequently absent and the notebook design must
accommodate this.

I would like to use CentOs as this is what I am most familiar with. 
But, I am open to CentOS alternatives like Ubuntu or even a
non-Linux alternative like a PowerMac with OS-X.

I have already looked at the Dell site on the basis of a friends
recommendation. While Dell mentions Ubuntu is available for some of
their notebook computers they do not seem to provide any way to
actually configure a system with it.

So, my desires are:

WANT:

Robust construction
Reliable quality
Reasonable weight (< 2.5 kg all in)
Supported sound and video reproduction of reasonable quality
15-17" lcd screen
Out-of-the-box support for wireless networking
Battery life > 2.0 hrs.
Not MS-Windows

PREFER:

64 bit
core duo 2
2-4+ Gb RAM
120+ Gb HDD
writable multi-mode DVD/CD drive
CentOS-5+

Your system suggestions, both for hardware and OS, are most welcome.

-- 
***  E-Mail is NOT a SECURE channel  ***
James B. Byrnemailto:byrn...@harte-lyne.ca
Harte & Lyne Limited  http://www.harte-lyne.ca
9 Brockley Drive  vox: +1 905 561 1241
Hamilton, Ontario fax: +1 905 561 0757
Canada  L8E 3C3

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Re: [CentOS] [OT] 8-15 TB storage: any recommendations?

[Ray Van Dolson]

On Thu, Jan 07, 2010 at 05:28:34PM +, Joseph L. Casale wrote:
> >> I also heard that disks above 1TB might have reliability issues.
> >> Maybe it changed since then...
> >>
> >
> >I remember rumors about the early 2TB Seagates.
> >
> >Personally, I won't RAID SATA drives over 500GB unless they're
> >enterprise-level ones with the limits on how long before the drive
> >reports a problem back to the host when it has a read error.
> >
> >Which should also take care of the reliability issue to a large
> >degree.
> 
> An often overlooked issue is the rebuild time with Linux software
> raid and all hw raid controllers I have seen. On large drives the
> times are so long as a result of the sheer size, if the array is
> degraded you are exposed during the rebuild. ZFS's resilver has this
> addressed as good as you can by only copying actual data.
> 
> With this in mind, it's wise to consider how you develop the
> redundancy into the solution...

Very true... especially with 1TB+ drives you definitely are crazy to
run anything other than RAID-6.

Lately we've been buying 24 bay systems from Silicon Mechanics,
installing Solaris 10 and running RAID-Z2 + SSD for L2ARC and ZIL.
Makes for great NFS storage...

The next release of Solaris 10 should have RAID-Z3 which might be
better for the >1TB drives out there.

(You can of course do this with OpenSolaris as well and something
similar on CentOS albeit not with ZFS).

When we need a little higher level of HA and "Enterprise-ness" we go
NetApp.  Just. Works. :)

Ray
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Re: [CentOS] 8-15 TB storage: any recommendations?

[John Doe]

Yes, the Sun Fire Xs are costly...
Here, 35k euros for 48 x 1TB by example, or 22k for 48 x 500GB...
Our 12TB HP is around 6k.  So 12k for almost the same as the 22k
But if you use 1TB disks on the Sun, you end up using half the Us (and save 
some power) in your bay; which might be nice if you are tight on physical 
space...
It all depends on your needs.
Note that I think the Sun Fire X uses software RAID (from zfs)...

JD


  
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Re: [CentOS] [OT] 8-15 TB storage: any recommendations?

[Joseph L. Casale]

>> I also heard that disks above 1TB might have reliability issues.
>> Maybe it changed since then...
>>
>
>I remember rumors about the early 2TB Seagates.
>
>Personally, I won't RAID SATA drives over 500GB unless they're 
>enterprise-level ones with the limits on how long before the drive 
>reports a problem back to the host when it has a read error.
>
>Which should also take care of the reliability issue to a large degree.

An often overlooked issue is the rebuild time with Linux software raid and
all hw raid controllers I have seen. On large drives the times are so long
as a result of the sheer size, if the array is degraded you are exposed during
the rebuild. ZFS's resilver has this addressed as good as you can by only 
copying
actual data.

With this in mind, it's wise to consider how you develop the redundancy into
the solution...
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Re: [CentOS] [OT] 8-15 TB storage: any recommendations?

[Thomas Harold]

On 1/7/2010 10:54 AM, John Doe wrote:
> From: Karanbir Singh
>> On 01/07/2010 02:30 PM, Boris Epstein wrote:
>>> KB, thanks. When you say "dont go over 1 TiB in storage per spindle"
>>> what are you referring to as spindle?
>>
>> disk. it boils down to how much data do you want to put under one
>> read/write stream.
>>
>> the other thing is that these days 1.5TB disks are the best
>> bang-for-the-buck in terms of storage/cost. So maybe thats something to
>> consider, and limit disk usage down initially - expand later as you need.
>>
>> Even better if your hba can support that, if not then mdadm ( have lots
>> of cpu right ? ), and make sure you understand recarving / reshaping
>> before you do the final design. Refactoring filers with large quantities
>> of data is no fun if you cant reshape and grow.
>
> I also heard that disks above 1TB might have reliability issues.
> Maybe it changed since then...
>

I remember rumors about the early 2TB Seagates.

Personally, I won't RAID SATA drives over 500GB unless they're 
enterprise-level ones with the limits on how long before the drive 
reports a problem back to the host when it has a read error.

Which should also take care of the reliability issue to a large degree.
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Re: [CentOS] 8-15 TB storage: any recommendations?

[Boris Epstein]

On Thu, Jan 7, 2010 at 11:09 AM, Matty  wrote:

> On Thu, Jan 7, 2010 at 8:08 AM, Chan Chung Hang Christopher
>  wrote:
> > John Doe wrote:
> >> From: Boris Epstein 
> >>> This is not directly related to CentOS but still: we are trying to set
> up some storage servers to run under Linux - most likely CentOS. The storage
> volume would be in the range specified: 8-15 TB. Any recommendations as far
> as hardware?
> >>
> >> Depends on your budget.
> >> Here, we use HP DL180 servers (12 x 1TB disks in 2U)...
> >> You can also check Sun Fire X servers; up to 48 x 1TB in 4U...
> >>
> >
> > Somebody said something about Sun servers being pricey and that quality
> > was going downhill...something about cheap controllers...any comments on
> > this?
>
> We have a bunch of X4540 Netbackup media servers running Solaris 10 +
> ZFS. While I can't comment on all of the controllers Sun uses, the
> SATA chipset / controllers in the 4540 seem to be pretty solid so far
> (our backup servers process 20TB+ of data each day).
>
> - Ryan
> --
> http://prefetch.net
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>

Thanks Ryan!

What price range (roughly) are we talking here?

Boris.
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Re: [CentOS] 8-15 TB storage: any recommendations?

[Matty]

On Thu, Jan 7, 2010 at 8:08 AM, Chan Chung Hang Christopher
 wrote:
> John Doe wrote:
>> From: Boris Epstein 
>>> This is not directly related to CentOS but still: we are trying to set up 
>>> some storage servers to run under Linux - most likely CentOS. The storage 
>>> volume would be in the range specified: 8-15 TB. Any recommendations as far 
>>> as hardware?
>>
>> Depends on your budget.
>> Here, we use HP DL180 servers (12 x 1TB disks in 2U)...
>> You can also check Sun Fire X servers; up to 48 x 1TB in 4U...
>>
>
> Somebody said something about Sun servers being pricey and that quality
> was going downhill...something about cheap controllers...any comments on
> this?

We have a bunch of X4540 Netbackup media servers running Solaris 10 +
ZFS. While I can't comment on all of the controllers Sun uses, the
SATA chipset / controllers in the 4540 seem to be pretty solid so far
(our backup servers process 20TB+ of data each day).

- Ryan
--
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Re: [CentOS] [OT] 8-15 TB storage: any recommendations?

[John Doe]

From: Karanbir Singh 
> On 01/07/2010 02:30 PM, Boris Epstein wrote:
> > KB, thanks. When you say "dont go over 1 TiB in storage per spindle"
> > what are you referring to as spindle?
> 
> disk. it boils down to how much data do you want to put under one 
> read/write stream.
> 
> the other thing is that these days 1.5TB disks are the best 
> bang-for-the-buck in terms of storage/cost. So maybe thats something to 
> consider, and limit disk usage down initially - expand later as you need.
> 
> Even better if your hba can support that, if not then mdadm ( have lots 
> of cpu right ? ), and make sure you understand recarving / reshaping 
> before you do the final design. Refactoring filers with large quantities 
> of data is no fun if you cant reshape and grow.

I also heard that disks above 1TB might have reliability issues.
Maybe it changed since then...

JD


  
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Re: [CentOS] tar exclude command

[Fábio Jr.]

Hello,
>
> tar -cv --exclude '/var/named/chroot/proc/*' -zf backup.tar.gz /var/named
>   
I think this is the best way to use wildcards in expressions to avoid 
problems. ;)
>
>
> tar -cv --exclude /var/named/chroot/proc -zf backup.tar.gz /var/named
>   
Yes, it works, but it didn't create the proc folder inside the tar 
folder tree. Example:

Original folder tree:

- var
|- named
   |- chroot
  |- proc
 |- garbage1.txt
 |- garbage2.txt
  |- foo
 |- test1.txt
 |- test2.txt
  |- bar
 |- test3.txt
 |- test4.txt

# tar -cv --exclude '/var/named/chroot/proc/*' -zf backup.tar.gz /var/named


Will keep this structure at backup.tar.gz

- var
|- named
   |- chroot
  |- proc
  |- foo
 |- test1.txt
 |- test2.txt
  |- bar
 |- test3.txt
 |- test4.txt

tar -cv --exclude /var/named/chroot/proc -zf backup.tar.gz /var/named

Will save this structure at backup.tar.gz

- var
|- named
   |- chroot
  |- foo
 |- test1.txt
 |- test2.txt
  |- bar
 |- test3.txt
 |- test4.txt

[]s


-- 
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- http://fabioojunior.wordpress.com -

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Re: [CentOS] tar exclude command

[Robert Heller]

At Thu, 7 Jan 2010 07:06:11 -0800 (PST) CentOS mailing list  
wrote:

> 
> Hi 
> 
> I have problem in tar command
> 
> Can you help?
> 
> tar -cv --exclude /var/named/chroot/proc/* -zf backup.tar.gz /var/named 
> 
> /var/named/chroot/proc/net/route
> /var/named/chroot/proc/net/udp
> /var/named/chroot/proc/net/tcp
> tar: Error exit delayed from previous errors

"It is almost *always* wrong to pass an unquoted wildcard to tar."

Try this:

tar -cv --exclude '/var/named/chroot/proc/*' -zf backup.tar.gz /var/named

Although I suspect that:

tar -cv --exclude /var/named/chroot/proc -zf backup.tar.gz /var/named

will also work.

> 
> Thank you
> 
> Send instant messages to your online friends http://uk.messenger.yahoo.com 
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Re: [CentOS] [OT] 8-15 TB storage: any recommendations?

[Robert Heller]

At Thu, 7 Jan 2010 09:30:17 -0500 CentOS mailing list  wrote:

> 
> On Thu, Jan 7, 2010 at 9:27 AM, Karanbir Singh  wrote:
> > On 01/06/2010 09:35 PM, Boris Epstein wrote:
> >> Hello everyone,
> >>
> >> This is not directly related to CentOS but still: we are trying to set
> >> up some storage servers to run under Linux - most likely CentOS. The
> >> storage volume would be in the range specified: 8-15 TB. Any
> >> recommendations as far as hardware?
> >
> >
> > I would recommend dont-homebrew. Get a vendor to build you a 3/4U box,
> > get a couple of quad core cpu's in, and enough ram to do you in-use
> > buffers. Also dont go over 1 TiB in storage per spindle if you want to
> > get even relatively reasonable performance ( even when in use as a filer
> > box ).
> >
> > Not long back, I had the chance to do some performance metrics on a dual
> > Areca-16xx hosted 24x1TiB disk setup - and we tested it for various
> > loads, running CentOS-5.4/x86_64 and it consistently outperformed the
> > sun thumper box's, coming in about 1/4th the price.
> >
> > The other thing to keep in mind is to estimate and prove the cpu
> > processing capability and network capability you are going to need out
> > of this machine and dont skim on that. Dont just get overly focused on
> > just the hba and disk metrics.
> >
> > - KB
> > ___
> > CentOS mailing list
> > CentOS@centos.org
> > http://lists.centos.org/mailman/listinfo/centos
> >
> 
> KB, thanks. When you say "dont go over 1 TiB in storage per spindle"
> what are you referring to as spindle?

Generally 'spindle' == 'physical disk drive'.  

> 
> Boris.
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>   

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Deepwoods Software-- Download the Model Railroad System
http://www.deepsoft.com/  -- Binaries for Linux and MS-Windows
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Re: [CentOS] [OT] 8-15 TB storage: any recommendations?

[Karanbir Singh]

On 01/07/2010 02:30 PM, Boris Epstein wrote:
> KB, thanks. When you say "dont go over 1 TiB in storage per spindle"
> what are you referring to as spindle?

disk. it boils down to how much data do you want to put under one 
read/write stream.

the other thing is that these days 1.5TB disks are the best 
bang-for-the-buck in terms of storage/cost. So maybe thats something to 
consider, and limit disk usage down initially - expand later as you need.

Even better if your hba can support that, if not then mdadm ( have lots 
of cpu right ? ), and make sure you understand recarving / reshaping 
before you do the final design. Refactoring filers with large quantities 
of data is no fun if you cant reshape and grow.

- KB
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Re: [CentOS] tar exclude command

[Luciano Rocha]

On Thu, Jan 07, 2010 at 07:06:11AM -0800, adrian kok wrote:
> Hi 
> 
> I have problem in tar command
> 
> Can you help?
> 
> tar -cv --exclude /var/named/chroot/proc/* -zf backup.tar.gz /var/named 

You must escape the *, so that shell doesn't convert the command to:
 tar -cv --exclude /var/named/chroot/proc/1 /var/named/chroot/proc/2 ...

Use:
tar -cv --exclude /var/named/chroot/proc/\* -zf backup.tar.gz /var/named

Or just --exclude proc?

-- 
lfr
0/0


pgpUpFxNwiDab.pgp
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Re: [CentOS] [OT] 8-15 TB storage: any recommendations?

[William Warren]

On 1/7/2010 9:30 AM, Boris Epstein wrote:
> On Thu, Jan 7, 2010 at 9:27 AM, Karanbir Singh  wrote:
>
>> On 01/06/2010 09:35 PM, Boris Epstein wrote:
>>  
>>> Hello everyone,
>>>
>>> This is not directly related to CentOS but still: we are trying to set
>>> up some storage servers to run under Linux - most likely CentOS. The
>>> storage volume would be in the range specified: 8-15 TB. Any
>>> recommendations as far as hardware?
>>>
>>
>> I would recommend dont-homebrew. Get a vendor to build you a 3/4U box,
>> get a couple of quad core cpu's in, and enough ram to do you in-use
>> buffers. Also dont go over 1 TiB in storage per spindle if you want to
>> get even relatively reasonable performance ( even when in use as a filer
>> box ).
>>
>> Not long back, I had the chance to do some performance metrics on a dual
>> Areca-16xx hosted 24x1TiB disk setup - and we tested it for various
>> loads, running CentOS-5.4/x86_64 and it consistently outperformed the
>> sun thumper box's, coming in about 1/4th the price.
>>
>> The other thing to keep in mind is to estimate and prove the cpu
>> processing capability and network capability you are going to need out
>> of this machine and dont skim on that. Dont just get overly focused on
>> just the hba and disk metrics.
>>
>> - KB
>> ___
>> CentOS mailing list
>> CentOS@centos.org
>> http://lists.centos.org/mailman/listinfo/centos
>>
>>  
> KB, thanks. When you say "dont go over 1 TiB in storage per spindle"
> what are you referring to as spindle?
>
> Boris.
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>
>
per HDD
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Re: [CentOS] tar exclude command

[Ceg Ryan]

Try  tar --exclude=/var/named/chroot/proc/* -zcvf backup.tar.gz /var/named

On Thu, Jan 7, 2010 at 11:06 PM, adrian kok wrote:

> Hi
>
> I have problem in tar command
>
> Can you help?
>
> tar -cv --exclude /var/named/chroot/proc/* -zf backup.tar.gz /var/named
>
> /var/named/chroot/proc/net/route
> /var/named/chroot/proc/net/udp
> /var/named/chroot/proc/net/tcp
> tar: Error exit delayed from previous errors
>
> Thank you
>
> Send instant messages to your online friends http://uk.messenger.yahoo.com
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[CentOS] tar exclude command

[adrian kok]

Hi 

I have problem in tar command

Can you help?

tar -cv --exclude /var/named/chroot/proc/* -zf backup.tar.gz /var/named 

/var/named/chroot/proc/net/route
/var/named/chroot/proc/net/udp
/var/named/chroot/proc/net/tcp
tar: Error exit delayed from previous errors

Thank you

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Re: [CentOS] High l-avg with centos 4.8 on G2 only

[fortin.pierre]

On Tue, Jan 5, 2010 at 8:51 AM,   wrote:
> Hi
>
>
>
> We deployed centos 4.8 on HP DL380 G2, G3 and G4 servers (same number of
> cpus). The same software is running on all servers.
>
> Only on G2 servers we see a low cpu utilization combined with high
> load-average.
>
> For example, during the same time of day and same workload, on a G2 I see a
> l-avg of 11.31 and on a G4 I see 2.68.
>

>Make sure you have updated the G2 BIOS boxes. Some of the HP DL380's
>had ACPI issues with NUMA memory causing 'phantom' loads as the system
>took longer to page stuff. The box I dealt with was fixed with an
>updated BIOS. If that doesn't work.. look at the various ACPI options
>to tune the kernel.


Thanks for the comment. Updating the BIOS to the latest version available 
didn't help. I'll start looking into the acpi options. If you have some advice 
about these options, I'd appreciate it.

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Re: [CentOS] cron job schedule problem

[Kwan Lowe]

2010/1/7 mcclnx mcc :
> We have CENTOS 5.3 on DELL server.  there has a cron job supposedly should 
> run on 1st and 3rd week on Saturday but it run everyday.  anyone know what 
> wrong?
>
>
> 01 08 1-7,15-21 * 6 program.sh
>

>From "man 5 crontab"
   The time and date fields are:

  field  allowed values
  -  --
  minute 0-59
  hour   0-23
  day of month   1-31
  month  1-12 (or names, see below)
  day of week0-7 (0 or 7 is Sun, or use names)

   A field may be an asterisk (*), which always stands for "first-last".

   Ranges of numbers are allowed.  Ranges are two numbers separated with a
   hyphen.  The specified range is inclusive.  For example,  8-11  for  an
   "hours" entry specifies execution at hours 8, 9, 10 and 11.

   Lists are allowed.  A list is a set of numbers (or ranges) separated by
   commas.  Examples: "1,2,5,9", "0-4,8-12".


 01 08 1-7,15-21 * 6 program.sh

So you have the first field (minute), which says run if matched on minute 1.
The next field (hour), says run on the 8th hour.
The next field (day of month), says run on 1st through the 7th, and
15th through 21st.
The next field (month), says run every month.
The next field (day of week) says run on the 6th day (Saturday).

And then this is the important piece:
   Note: The day of a command’s execution can be specified by two fields —
   day of month, and day of week.  If  both  fields  are  restricted  (ie,
   aren’t  *),  the command will be run when either field matches the cur-
   rent time.  For example,
   "30 4 1,15 * 5" would cause a command to be run at 4:30 am on  the  1st
   and 15th of each month, plus every Friday.

So your above example will run every day from 1-7, any Saturdays in
between, and 15 through 21.
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Re: [CentOS] cron job schedule problem

[Jim Perrin]

This was just recently

2010/1/7 mcclnx mcc :
> We have CENTOS 5.3 on DELL server.  there has a cron job supposedly should 
> run on 1st and 3rd week on Saturday but it run everyday.  anyone know what 
> wrong?

This was just covered recently in another mail thread with loads of
examples and technical discussion. Please see
http://lists.centos.org/pipermail/centos/2010-January/088255.html  as
this may help you.

-- 
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Re: [CentOS] [OT] 8-15 TB storage: any recommendations?

[Boris Epstein]

On Thu, Jan 7, 2010 at 9:27 AM, Karanbir Singh  wrote:
> On 01/06/2010 09:35 PM, Boris Epstein wrote:
>> Hello everyone,
>>
>> This is not directly related to CentOS but still: we are trying to set
>> up some storage servers to run under Linux - most likely CentOS. The
>> storage volume would be in the range specified: 8-15 TB. Any
>> recommendations as far as hardware?
>
>
> I would recommend dont-homebrew. Get a vendor to build you a 3/4U box,
> get a couple of quad core cpu's in, and enough ram to do you in-use
> buffers. Also dont go over 1 TiB in storage per spindle if you want to
> get even relatively reasonable performance ( even when in use as a filer
> box ).
>
> Not long back, I had the chance to do some performance metrics on a dual
> Areca-16xx hosted 24x1TiB disk setup - and we tested it for various
> loads, running CentOS-5.4/x86_64 and it consistently outperformed the
> sun thumper box's, coming in about 1/4th the price.
>
> The other thing to keep in mind is to estimate and prove the cpu
> processing capability and network capability you are going to need out
> of this machine and dont skim on that. Dont just get overly focused on
> just the hba and disk metrics.
>
> - KB
> ___
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> http://lists.centos.org/mailman/listinfo/centos
>

KB, thanks. When you say "dont go over 1 TiB in storage per spindle"
what are you referring to as spindle?

Boris.
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Re: [CentOS] [OT] 8-15 TB storage: any recommendations?

[Karanbir Singh]

On 01/06/2010 09:35 PM, Boris Epstein wrote:
> Hello everyone,
>
> This is not directly related to CentOS but still: we are trying to set
> up some storage servers to run under Linux - most likely CentOS. The
> storage volume would be in the range specified: 8-15 TB. Any
> recommendations as far as hardware?


I would recommend dont-homebrew. Get a vendor to build you a 3/4U box, 
get a couple of quad core cpu's in, and enough ram to do you in-use 
buffers. Also dont go over 1 TiB in storage per spindle if you want to 
get even relatively reasonable performance ( even when in use as a filer 
box ).

Not long back, I had the chance to do some performance metrics on a dual 
Areca-16xx hosted 24x1TiB disk setup - and we tested it for various 
loads, running CentOS-5.4/x86_64 and it consistently outperformed the 
sun thumper box's, coming in about 1/4th the price.

The other thing to keep in mind is to estimate and prove the cpu 
processing capability and network capability you are going to need out 
of this machine and dont skim on that. Dont just get overly focused on 
just the hba and disk metrics.

- KB
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Re: [CentOS] 8-15 TB storage: any recommendations?

[Benjamin Donnachie]

2010/1/7 Karanbir Singh :
> I've had 2 drobo's at work - and i can assure you that it is essentially
> a wasted device.

I agree with this.  We had a Drobo on loan for a while, I found it
sluggish and detested the way it over-reports its free space.

Couldn't wait to hand it back.

Ben
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[CentOS] cron job schedule problem

[mcclnx mcc]

We have CENTOS 5.3 on DELL server.  there has a cron job supposedly should run 
on 1st and 3rd week on Saturday but it run everyday.  anyone know what wrong?


01 08 1-7,15-21 * 6 program.sh 

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Re: [CentOS] 8-15 TB storage: any recommendations?

[Karanbir Singh]

On 01/07/2010 03:28 AM, earl ramirez wrote:
> You can have a look at this, I don't know what your budget is like
>
> http://www.drobo.com/Products/drobopro/index.php
>
> I have a drobo and it worked off the bat with a few linux distros
>

I've had 2 drobo's at work - and i can assure you that it is essentially 
a wasted device. IF you want to go down that route, get a proper 
machine. eg. the drobo never managed to get over 60% of capacity 
performance, and has massive latency issues when you cross 50k files on 
the storage.

- KB
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Re: [CentOS] Mplayer and VDPAU

[Ralph Angenendt]

> Yes, tried that. it doesn't list vdpau. however "strings mplayer |
> grep -y vdpau" turns up a number of instances of vdpau.

Um, yes. But:

[ra...@reboot ~]$ mplayer -vo help|grep vdpau
vdpau   VDPAU with X11
[ra...@reboot ~]$

Regards,

Ralph
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Re: [CentOS] centos IDM + sogo

[Ralph Angenendt]

On Thu, Jan 7, 2010 at 1:00 PM, Geoff Galitz  wrote:
> 
> ldapadd -f sogo.ldif -x -W -D cn="Directory Manager",dc=XXX,dc=de
> Enter LDAP Password:
> ldap_bind: No such object (32)
>        matched DN: dc=XXX,dc=de
> ---
>
> It is my understanding that this means the "Directory Manager" user was not
> found.  User authentication does not work from SOGo, at all.

Hmmm. Try -D 'cn="Directory Manager",dc=example,dc=com"

It looks like it tried to authenticate with the DN "dc=example,dc=com"
without the needed cn.

Quoting sometimes *is* strange.

Ralph
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Re: [CentOS] 8-15 TB storage: any recommendations?

[Eero Volotinen]

Quoting Chan Chung Hang Christopher :

> John Doe wrote:
>> From: Boris Epstein 
>>> This is not directly related to CentOS but still: we are trying to  
>>>  set up some storage servers to run under Linux - most likely   
>>> CentOS. The storage volume would be in the range specified: 8-15   
>>> TB. Any recommendations as far as hardware?
>>
>> Depends on your budget.
>> Here, we use HP DL180 servers (12 x 1TB disks in 2U)...
>> You can also check Sun Fire X servers; up to 48 x 1TB in 4U...
>>
>
> Somebody said something about Sun servers being pricey and that quality
> was going downhill...something about cheap controllers...any comments on
> this?
>
> BTW, the Sun X4540 can only be bought with all disks loaded. So it is
> not up to 48 but must be 48 in 4U.

Atleast old sun fire servers are using cheap ata controllers ...

My own solution is based on supermicro server with areca raid controller.

case: ATX Supermicro SC836TQ-R800V (16xSAS) with areca 16 port sata  
raid controller.(Areca ARC-1261ML)

You can easily buy cheap sata disks from 1 to 2TB * 16

--
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Re: [CentOS] 8-15 TB storage: any recommendations?

[Chan Chung Hang Christopher]

John Doe wrote:
> From: Boris Epstein 
>> This is not directly related to CentOS but still: we are trying to set up 
>> some storage servers to run under Linux - most likely CentOS. The storage 
>> volume would be in the range specified: 8-15 TB. Any recommendations as far 
>> as hardware?
> 
> Depends on your budget.
> Here, we use HP DL180 servers (12 x 1TB disks in 2U)...
> You can also check Sun Fire X servers; up to 48 x 1TB in 4U...
> 

Somebody said something about Sun servers being pricey and that quality 
was going downhill...something about cheap controllers...any comments on 
this?

BTW, the Sun X4540 can only be bought with all disks loaded. So it is 
not up to 48 but must be 48 in 4U.
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Re: [CentOS] centos 5.4 :: linux-2.6.32.2 compile error (via nano l2...@1600)

[Kay Diederichs]

Karanbir Singh schrieb:
> On 01/07/2010 11:36 AM, Ned Slider wrote:
>> Depends what hardware you have. ELRepo has a fixed powernow-k8 driver
>> for AMD processors that allows correct scaling on multicore processors.
>> See here:
> 
> OP has a VIA nano, the K8 stuff isnt going to work there.
> 
> I wonder if its possible to manually set clockrate.
> 
> - KB

the OP's posting had the hint

> The bug is not reproducible, so it is likely a hardware or OS problem.

To rule out a hardware problem it would be good to try the compilation
with e.g. Fedora 12 (run from LiveCD or USB stick).

I did not look at the config, but I had good results with the 2.6.31
kernel compiled on CentOS 5.4 with the Fedora 12 config (but that was on
x86_64 so YMMV).

HTH,

Kay

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Re: [CentOS] Dear Centos Mailing List, If you can't find in google, try JUSTDIAL.COM

[Anne Wilson]

On Thursday 07 January 2010 11:49:32 Karanbir Singh wrote:
> Actually, the only way to totally block spam is to setup a rotational 
> moderation team and moderate everything. Dont think I need to go into 
> the issues that would come with that setup.
> 
Besides which, more spam comes from threads like this than the unwanted mail 
itself :-)

Anne
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New to KDE Software? - get help from http://userbase.kde.org


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[CentOS] centos IDM + sogo

[Geoff Galitz]

Hello,

We are testing the Centos LDAP Directory Server but are running into issues
with applications (SOGo) authenticating against the LDAP system.  The crux
of my question is, can I just treat the Centos Directory Server as a generic
OpenLDAP configuration on the client side?

In more detail when I try to add account via ldapadd:



ldapadd -f sogo.ldif -x -W -D cn="Directory Manager",dc=XXX,dc=de
Enter LDAP Password:
ldap_bind: No such object (32)
matched DN: dc=XXX,dc=de
---


It is my understanding that this means the "Directory Manager" user was not
found.  User authentication does not work from SOGo, at all.

Any pointers?



-
Geoff Galitz
Blankenheim NRW, Germany
http://www.galitz.org/
http://german-way.com/blog/


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Re: [CentOS] Dear Centos Mailing List, If you can't find in google, try JUSTDIAL.COM

[Karanbir Singh]

On 01/07/2010 10:56 AM, Jake Shipton wrote:
> But if you want to truly block spam, you'll need to block out all
> accounts from: gmail, hotmail, yahoo&  any other free provider, but
> clearly that cannot happen for fairly obvious reasons :| Though if you
> don't already block out all the "temporary" 1 hour or 10 minute inbox
> providers then go block those ;-)

Actually, the only way to totally block spam is to setup a rotational 
moderation team and moderate everything. Dont think I need to go into 
the issues that would come with that setup.

- KB
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Re: [CentOS] centos 5.4 :: linux-2.6.32.2 compile error (via nano l2...@1600)

[Karanbir Singh]

On 01/07/2010 11:36 AM, Ned Slider wrote:
> Depends what hardware you have. ELRepo has a fixed powernow-k8 driver
> for AMD processors that allows correct scaling on multicore processors.
> See here:

OP has a VIA nano, the K8 stuff isnt going to work there.

I wonder if its possible to manually set clockrate.

- KB
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Re: [CentOS] centos 5.4 :: linux-2.6.32.2 compile error (via nano l2...@1600)

[Ned Slider]

On 01/07/2010 10:12 AM, Adrian Sevcenco wrote:
> Jim Perrin wrote:
>> On Wed, Jan 6, 2010 at 5:15 PM, Adrian Sevcenco  
>> wrote:
>>> Hi! I try to compile an vanilla kernel 2.6.32.2 on centos 5.4 and i have
>>> this error :
>>
>> Out of curiosity, why are you rebuilding the kernel? Is there a driver
>> you need which isn't supplied by the elrepo repository folks?
> Well, the thing is that i lack power scaling (i understood that the
> module should have name something like overhaul .. or something)
> Given that this is an samba home server with very little load is a pity
> that it stays all the time at maximum freq.. elrepo guys are fantastic
> and from them i have the vt1211 driver for the sensors .. but i dint see
> that they would have also scaling drivers in their repo.
> Thanks,
> Adrian
>

Depends what hardware you have. ELRepo has a fixed powernow-k8 driver 
for AMD processors that allows correct scaling on multicore processors. 
See here:

http://blog.toracat.org/2009/08/go-green-with-newer-amd-processors/
http://elrepo.org/tiki/kmod-powernow-k8

Other than that, generally I've found most scaling issues to be 
hardware/bios related, rather than an issue within CentOS itself so I'd 
suggest checking you have the latest bios for your motherboard and that 
all power saving options within the bios are correctly set.

Hope that helps.

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Re: [CentOS] Dear Centos Mailing List, If you can't find in google, try JUSTDIAL.COM

[Jake Shipton]

Oh, that's just great, I finally get my Thunderbird, filtering nicely,
and everything, rarely see spam.. it was all "Thunderbirds are Go!"...
and then.. it pops in through mailing list :| Didn't see that one
coming. (I have my mailing list on full mode, rather than digest, which
is why I'm a tad late to the "party" :p (Personal preference)

Thankfully mailing list spam is rare :-).

As for blocking "known" spam addresses, trust me, that really does not
work. Tried doing that oh, so many times with my inbox(s), in the end I
just set up specific "word" filtering, which basically, if an email
comes through with known common words used for spam (Such as your bank
account is insecure, change your online password etc from banks I'm not
even with :| Even if I was signed up with the bank, I would check the
link first see where it really goes :-)) (Staying smart is the best way
to not get conned ;-) )

But if you want to truly block spam, you'll need to block out all
accounts from: gmail, hotmail, yahoo & any other free provider, but
clearly that cannot happen for fairly obvious reasons :| Though if you
don't already block out all the "temporary" 1 hour or 10 minute inbox
providers then go block those ;-)

But to be honest, one spam message on the list, isn't bad, it could of
actually been a "human bot" basically, a someone who actually sends spam
rare now, but it still goes on :-), when it's actually people sending
the spam, it's hard to block.

No need to go around rushing for spam filtering at this moment of time
in my opinion, one or two messages can slip through any mailing list,
heck could even slip through the "worlds most spam blocking machine" (If
there is one). It happens. Also, everyone has to apply to the mailing
list (I assume), which helps prevent spam on it's own. Until you guys
start getting regular spam, there's nothing to worry about :-)

I'm gonna stop now, before I put you guys "asleep" :-D. Surprised you
read this far though. :-D Also gotta close the window, before the snow
makes my window shelf white. (Or gets into my comp) (It's snowing here :-D)

Just my 2p (Or rather, rambling on lol.)


-- 
Jake
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Re: [CentOS] 2 CPU's problem(Centos5)

[Peter Kjellstrom]

On Wednesday 06 January 2010, Anas Alnaffar wrote:
> Dears,
>
> I hope this email finds you well and in a very good health,
>
> I've been installed Centos5 on HP DL380 G5 server(Dual Processor), but
> actually we are unable to see the other CPU

Centos-5 works correctly with "HP DL380 G5 server(Dual Processor)" without 
modifications. So you're chasing either a hardware configuration problem or 
a "broken" install.

The contents of /proc/cpuinfo and the output of "dmesg" would allow us to give 
you better help.

> , during boot I get this error 
> message,
>
> Module microcode doesn't exit  /proc/modules

This is not the cause. It's a non-fatal warning that can be ignored.

/Peter

> Please advise.
> Thanks
> Anas Al-Naffar


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Re: [CentOS] centos 5.4 :: linux-2.6.32.2 compile error (via nano l2...@1600)

[Adrian Sevcenco]

Jim Perrin wrote:
> On Wed, Jan 6, 2010 at 5:15 PM, Adrian Sevcenco  
> wrote:
>> Hi! I try to compile an vanilla kernel 2.6.32.2 on centos 5.4 and i have
>> this error :
> 
> Out of curiosity, why are you rebuilding the kernel? Is there a driver
> you need which isn't supplied by the elrepo repository folks?
Well, the thing is that i lack power scaling (i understood that the
module should have name something like overhaul .. or something)
Given that this is an samba home server with very little load is a pity
that it stays all the time at maximum freq.. elrepo guys are fantastic
and from them i have the vt1211 driver for the sensors .. but i dint see
that they would have also scaling drivers in their repo.
Thanks,
Adrian


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Re: [CentOS] 8-15 TB storage: any recommendations?

[Rudi Ahlers]

On Thu, Jan 7, 2010 at 11:34 AM, John Doe  wrote:
> From: Boris Epstein 
>>This is not directly related to CentOS but still: we are trying to set up 
>>some storage servers to run under Linux - most likely CentOS. The storage 
>>volume would be in the range specified: 8-15 TB. Any recommendations as far 
>>as hardware?
>
> Depends on your budget.
> Here, we use HP DL180 servers (12 x 1TB disks in 2U)...
> You can also check Sun Fire X servers; up to 48 x 1TB in 4U...
>
> JD
>
>
>
> ___


SuperMicro also has good 1U, or 2U servers with plenty hard drive
space, and very affordable



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Web: http://www.SoftDux.com
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Cell: 082 554 7532
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Re: [CentOS] 8-15 TB storage: any recommendations?

[John Doe]

From: Boris Epstein 
>This is not directly related to CentOS but still: we are trying to set up some 
>storage servers to run under Linux - most likely CentOS. The storage volume 
>would be in the range specified: 8-15 TB. Any recommendations as far as 
>hardware?

Depends on your budget.
Here, we use HP DL180 servers (12 x 1TB disks in 2U)...
You can also check Sun Fire X servers; up to 48 x 1TB in 4U...

JD


  
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Re: [CentOS] stock openjdk vs. epel

[Mathieu Baudier]

I have created a YUM repo.
Just add a file /etc/yum.repos.d/argeo.repo with the following content:

[argeo-plus]
name=Argeo-EL-$releasever - Plus
baseurl=http://www.argeo.org/linux/argeo-el/$releasever/plus/$basearch
#includepkgs=java-1.6.0-openjdk*
gpgcheck=0

[argeo-plus-source]
name=Argeo-EL-$releasever - Plus Source
baseurl=http://www.argeo.org/linux/argeo-el/$releasever/plus/SRPMS
gpgcheck=0
enabled=0


WARNING: I recommend that you use the includepkgs option or the
priority plugin, because this repository will contain other packages
updating the Base CentOS!! (hence the 'plus' name, just like CentOS
Plus)

>> I'm concerned the yum update against the base/updates of Centos will
>> keep trying to install that crappy older version that Centos carries.
>> Have you tested that?

Actually if you configure the above repo, and just run a yum update
you will see that it upgrades the base OpenJdk . (you still need to
install the plugin additionally of course).

Installed Packages
java-1.6.0-openjdk.x86_64 1:1.6.0.0-1.7.b09.el5   installed
java-1.6.0-openjdk-demo.x86_641:1.6.0.0-1.7.b09.el5   installed
java-1.6.0-openjdk-devel.x86_64   1:1.6.0.0-1.7.b09.el5   installed
java-1.6.0-openjdk-javadoc.x86_64 1:1.6.0.0-1.7.b09.el5   installed
java-1.6.0-openjdk-src.x86_64 1:1.6.0.0-1.7.b09.el5   installed
Available Packages
java-1.6.0-openjdk.x86_64 1:1.6.0.0-33.b16.el5.argeo.2argeo-plus
java-1.6.0-openjdk-debuginfo.x86_64   1:1.6.0.0-33.b16.el5.argeo.2argeo-plus
java-1.6.0-openjdk-demo.x86_641:1.6.0.0-33.b16.el5.argeo.2argeo-plus
java-1.6.0-openjdk-devel.x86_64   1:1.6.0.0-33.b16.el5.argeo.2argeo-plus
java-1.6.0-openjdk-javadoc.x86_64 1:1.6.0.0-33.b16.el5.argeo.2argeo-plus
java-1.6.0-openjdk-plugin.x86_64  1:1.6.0.0-33.b16.el5.argeo.2argeo-plus
java-1.6.0-openjdk-src.x86_64 1:1.6.0.0-33.b16.el5.argeo.2argeo-plus

This is because of the -33 instead of the -1.7.

As I said previously, my approach is to track the Fedora version.
(that's why we add our build version at the end argeo.1, argeo.2 etc.)
With a bit of luck, this should smooth the transition to CentOS 6...

As I said, I have tested nothing on i386 (I just build it), especially
not the plugin (which is where most of the differences between the two
architectures lie in terms of packaging).

Feedback and ideas welcome!
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Re: [CentOS] Dear Centos Mailing List, If you can't find in google, try JUSTDIAL.COM

[Mathieu Baudier]

> but who subscribes from a work-address anyway?
> With all the disclaimers...

I personally do, and encourage people working with me to do it as well.

But we are in the FLOSS industry (our software does not even pretend
"to fit a particular purpose" ;), so it definitely does not apply to
LinkedIn.
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