[CentOS] Raqport Inc buyer beware

[David Booth]

Beware of doing business with Alex Bajan at Raqport.

In January 2007 I ordered and paid over US$2000 for a Tyan GS14 server 
and some installation and migration services. The server proved to be 
faulty. It would not stay up for more than a few hours. I followed all 
of Alex's recommendations, including replacing the RAM, the processor 
and reinstalling the CentOS/Bluequartz operating system but the device 
would spontaneously attempt to reboot at random intervals of less than a 
few hours. My guess is a faulty motherboard component.


I returned the device at my expense but months later I have had no 
satisfaction from Raqport regarding a replacement or refund of the money 
I sent - not even replies to emails or returned calls.


It is a very poor way to treat a customer.
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Re: [CentOS] OT: 4 dual cores agains 2 quad cores

[Sebastian Walter]

Hi,

performance measurement is always strongly dependent on the kind of 
computation you are performing. So to really find out, you need to do 
benchmarks with the programs you want to run.


If the price is not important, I would buy four quad cores with each 
3GHz per server.


Regards,
Sebastian


Erick Perez wrote:

Hi people,
Do you have pointers to web documents that help me make comparisons
between buying a server with two quad core 2.33 ghz or buying a 4 dual
core 2ghz server?
I am trying to answer a question of performance. It is not important
the redundancy/failover or the price of the server. Just the
performance.
obviously all the hardware specs are the same, the question is the CPU.


  


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Re: [CentOS] OT: 4 dual cores agains 2 quad cores

[David Amiel]

Hello,

to my mind the most impacting on a SMP server is the synchronisation time
between dies/cores. the time to synchronize 2 cores on different dies is
higher than the time to synchronize 2 cores on the same die. So to achieve
best performances you have to limit number of dies.
So a dual quad core should be more powerful than a 4 dual core.

You can verify this here : http://www.spec.org/cpu2006/results/cpu2006.html

results on a 2 chips server are ~20/30% higher than a 4 chips using the
same processor

regards,

David Amiel

Le Sam 1 septembre 2007 04:51, Erick Perez a écrit :
> Hi people,
> Do you have pointers to web documents that help me make comparisons
> between buying a server with two quad core 2.33 ghz or buying a 4 dual
> core 2ghz server?
> I am trying to answer a question of performance. It is not important
> the redundancy/failover or the price of the server. Just the
> performance.
> obviously all the hardware specs are the same, the question is the CPU.
>
>
> --
> 
> Erick Perez
> Panama Sistemas
> Integradores de Telefonia IP y Soluciones Para Centros de Datos
> Panama, Republica de Panama
> Cel Panama. +(507) 6694-4780
> 
> ___
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>


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[CentOS] CentOS 5 (64) Gnome - not detecting Optical Mouse

[Siva GNU/Linux]

Hi
I am using CentOS 5 64bit, i can install successfully on the below hardware.
while booting i can see the Pointer and use Mouse. But While i get a Login
screen I couldn't see the pointer, after login also i can't. when i press
CTRL button, it shows where the pointer is.. What should i do to enable and
work with Mouse.

AMD Athlon 64 X2 3800+
ASUS Nvidia Geforce Chipset board
1GB DDR 2
80 GB SATA
17" TFT
Logitech Optical Mouse


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+91-98840-57147.
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Re: [CentOS] Zimbra vs. Scalix vs. et. al.

[Tronn Wærdahl]

Open-Xchange is a nice one, It could be painfull to install so I have  put
together a CD, based on CentOS 44 with OX and lost more, you will be up and
running in about 30 minutts

You may find more information on my website http://www.nnortux.no
Click on the flag to get some information in english

I have made one with CentOS 5 allso, but at the moment, my impression is
that CentOS 5 is a bit inmature, lots of the modules dont work, so until I
got all modules working try it with CentOS 4.4

Enjoy

Tronn

On 8/31/07, John Hinton <[EMAIL PROTECTED]> wrote:
>
> Well, I stumbled onto zimbra
>
> I have a Scallix system built, but still have some rough edges to try to
> smooth. Like the way it works with sendmail, no dnsbl's will work as
> sendmail sees all mail as coming from locohost (scalix). Still battling
> that one which is when I ran across Zimbra.
>
> So, this made me start wondering.
>
> Are there other exchange server-like products out there?
>
> Has anyone dealt with Scalix and Zimbra (or another from the question
> above) and would you care to post pros and cons to each?
>
> Some of the cons to me with Scalix.
>
> It uses it's own directory structure which is non-sensical to any admin.
> Each seems to be assigned on a numbering system.. finding who has what
> where is not fun and I fear will be a nightmare in the future. Sendmail
> milters work fine to a point, but there is the limit of filtering using
> dnsbl's and it appears it will require setting up sendmail as the
> receiver, passing to scalix, passing back to sendmail, passing back to
> scalix and the user mail boxes... adding an extra loop.
>
> Shared folder are nice.. shared calendars are pretty good although I
> don't see a way to sort by user are even really see immediately for
> which user the event exists. You can drag and drop from Outlook IMAP a
> file directly to the server, but internally we don't use outlook... but
> for other clients this could be nice.
>
> So, how are those Zimbra installs going and what's the scoop?
>
> Thanks,
> John Hinton
> ___
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>



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Re: [CentOS] Raqport Inc buyer beware

[Tronn Wærdahl]

On 9/1/07, David Booth <[EMAIL PROTECTED]> wrote:
>
> Beware of doing business with Alex Bajan at Raqport.
>
> In January 2007 I ordered and paid over US$2000 for a Tyan GS14 server
> and some installation and migration services. The server proved to be
> faulty. It would not stay up for more than a few hours. I followed all
> of Alex's recommendations, including replacing the RAM, the processor
> and reinstalling the CentOS/Bluequartz operating system but the device
> would spontaneously attempt to reboot at random intervals of less than a
> few hours. My guess is a faulty motherboard component.
>
> I returned the device at my expense but months later I have had no
> satisfaction from Raqport regarding a replacement or refund of the money
> I sent - not even replies to emails or returned calls.
>
> It is a very poor way to treat a customer.
> ___
> David Booth
> ___
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> CentOS@centos.org
> http://lists.centos.org/mailman/listinfo/centos
>

My experience with that company is not good either, they dont keep what they
promisse

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Re: [CentOS] OT: Suggestions for RAID HW for 2SATA drivesin DellPowerEdge SC

[Feizhou]

For 2 SATA hard disks used for the OS I think HW RAID is overkill.
Depends. HW RAID + BBU CACHE vs SW RAID vs SW RAID + 
NVRAM...You cannot 
say overkill in certain cases.


I only say that because if one is really looking for high performance
then more spindles then 2 will be the first thing to do and getting
that data off the OS drives that may do swap under load is key too.


Yes, however, sometimes you get the choice of BBU cache with hardware 
RAID but not more spindles you see and if the i/o is bursty then it is 
likely that adding extra spindles will not match RAM speeds. As for 
swap, I then to tune things such that swap is never in use (at least not 
constantly)





Besides I do not believe the PERC 5IR has BBU cache, that
controller is really only meant as a simple RAID1 controller for
the OS.
Dell certainly has a BBU cache option, not sure if OP's Poweredge box 
has that option.


Oh yes, the PERC 5e is very good, I have a couple here and they really
do pull in impressive numbers even with only 256MB write-back, I of
course use these with the MD1000 enclosures though.


:-)

I must admit that my viewpoint is a bit eskewed by mostly having to 
manage mail servers with two disk cases only.





If you use HW RAID you will need to install the manufacturer's
software for monitoring it for a hard disk failure.

Yes, likely a negative but with Dell supporting Linux maybe not so.


Ah, well a lot of these are Java apps for cross-platform compatibility
and some times the JavaVMs leak memory... so definitely YMMV.


Ick! Have not had to touch one of these yet. But then the Compaq DL380 
did not have Linux 2.6 compatible monitoring software so I did without...





If you wanted to add additional storage, say a SAS/SATA enclosure
of 15 disks, then I would definitely invest in a HW RAID card for
that!


Depends :-D. How many hardware RAID cards offer 1GB of cache?


Not many I can tell you that, but then again a well implemented
write-back cache doesn't need a huge amount of memory to be effective.


I don't know...if the amount of i/o is enough to swamp the write-back 
cache, then software raid is probably going to be a better choice.


This is the only reason why 3ware 750x and 3ware 850x boards sucked for 
RAID5 performance. They were powerful enough processor wise for normal 
conditions but they had no write-back cache and so software raid would 
make them lick the dust. Come degraded mode and those boards will cry 
and you will too. I don't know about the 955x series in degraded mode 
though but a 10 disk RAID5 array in normal mode with write-back cache of 
128MB was pretty decent as a mail queue.

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[CentOS] CentOS-announce Digest, Vol 31, Issue 1

[centos-announce-request]

Send CentOS-announce mailing list submissions to
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To subscribe or unsubscribe via the World Wide Web, visit
http://lists.centos.org/mailman/listinfo/centos-announce
or, via email, send a message with subject or body 'help' to
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When replying, please edit your Subject line so it is more specific
than "Re: Contents of CentOS-announce digest..."


Today's Topics:

   1. CESA-2007:0875 Important CentOS 4 x86_64 mysql -  security
  update (Johnny Hughes)
   2. CESA-2007:0875 Important CentOS 4 i386 mysql -security
  update (Johnny Hughes)


--

Message: 1
Date: Fri, 31 Aug 2007 19:43:01 -0500
From: Johnny Hughes <[EMAIL PROTECTED]>
Subject: [CentOS-announce] CESA-2007:0875 Important CentOS 4 x86_64
mysql - security update
To: CentOS-Announce <[EMAIL PROTECTED]>
Message-ID: <[EMAIL PROTECTED]>
Content-Type: text/plain; charset="iso-8859-1"

CentOS Errata and Security Advisory 2007:0875

https://rhn.redhat.com/errata/RHSA-2007-0875.html  The following

updated files have been uploaded and are currently syncing to the
mirrors:

x86_64
mysql-4.1.20-2.RHEL4.1.0.1.i386.rpm
mysql-4.1.20-2.RHEL4.1.0.1.x86_64.rpm
mysql-bench-4.1.20-2.RHEL4.1.0.1.x86_64.rpm
mysql-devel-4.1.20-2.RHEL4.1.0.1.x86_64.rpm
mysql-server-4.1.20-2.RHEL4.1.0.1.x86_64.rpm

src:
mysql-4.1.20-2.RHEL4.1.0.1.src.rpm

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--

Message: 2
Date: Fri, 31 Aug 2007 19:43:14 -0500
From: Johnny Hughes <[EMAIL PROTECTED]>
Subject: [CentOS-announce] CESA-2007:0875 Important CentOS 4 i386
mysql - security update
To: CentOS-Announce <[EMAIL PROTECTED]>
Message-ID: <[EMAIL PROTECTED]>
Content-Type: text/plain; charset="iso-8859-1"

CentOS Errata and Security Advisory 2007:0875

https://rhn.redhat.com/errata/RHSA-2007-0875.html  The following

updated files have been uploaded and are currently syncing to the
mirrors:

i386:
x86_64
mysql-4.1.20-2.RHEL4.1.0.1.i386.rpm
mysql-bench-4.1.20-2.RHEL4.1.0.1.i386.rpm
mysql-devel-4.1.20-2.RHEL4.1.0.1.i386.rpm
mysql-server-4.1.20-2.RHEL4.1.0.1.i386.rpm

src:
mysql-4.1.20-2.RHEL4.1.0.1.src.rpm

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Re: [CentOS] OT: 4 dual cores agains 2 quad cores

[Peter Farrow]

Fundamentally it comes down to I/O performance between the CPU cores and 
memory bus.


Quad core CPUs suffer from performance bottlenecks with regard to Dual 
cores which leads to a less of an improvement than one might expect from 
clock speed alone


There are articles here worth a read:

http://www.tomshardware.com/2006/09/10/four_cores_on_the_rampage/

As has already been mentioned, if you have four sockets to fill you 
might as well fill it with Quad cores anyway


You might find this useful too:

http://www.tomshardware.com/2007/08/08/extreme_fsb_2/

Regards

Pete




David Amiel wrote:

Hello,

to my mind the most impacting on a SMP server is the synchronisation time
between dies/cores. the time to synchronize 2 cores on different dies is
higher than the time to synchronize 2 cores on the same die. So to achieve
best performances you have to limit number of dies.
So a dual quad core should be more powerful than a 4 dual core.

You can verify this here : http://www.spec.org/cpu2006/results/cpu2006.html

results on a 2 chips server are ~20/30% higher than a 4 chips using the
same processor

regards,

David Amiel

Le Sam 1 septembre 2007 04:51, Erick Perez a écrit :
  

Hi people,
Do you have pointers to web documents that help me make comparisons
between buying a server with two quad core 2.33 ghz or buying a 4 dual
core 2ghz server?
I am trying to answer a question of performance. It is not important
the redundancy/failover or the price of the server. Just the
performance.
obviously all the hardware specs are the same, the question is the CPU.


--

Erick Perez
Panama Sistemas
Integradores de Telefonia IP y Soluciones Para Centros de Datos
Panama, Republica de Panama
Cel Panama. +(507) 6694-4780

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Re: [CentOS] Virtual Hosting

[William Warren]

you can also go with webmin to configure this stuff..

[EMAIL PROTECTED] wrote:

Dear All,

Im sorry for posting this query here but was helpless.. as i am not able
to subscribe to sendmail mailing list

i have jus installed CentOS 5 and the following software

sendmail 8.13
bind 9.3

this machine is used as a primary DNS and out mail server
and is been workin perfect

we jus have a new domain and i want to have virtual mail hosting on the
smae machine for our new domain

apprecite if you can help me
with some steps or any links which can give me example of settin up
virtual mail hosting with sendmail

thnks and regards


benedict





--
My "Foundation" verse:
Isa 54:17  No weapon that is formed against thee shall prosper; and 
every tongue that shall rise against thee in judgment thou shalt 
condemn. This is the heritage of the servants of the LORD, and their 
righteousness is of me, saith the LORD.


-- carpe ductum -- "Grab the tape"
CDTT (Certified Duct Tape Technician)

Linux user #322099
Machines:
206822
256638
276825
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Re: [CentOS] OT: 4 dual cores agains 2 quad cores

[Peter Arremann]

On Friday 31 August 2007, Erick Perez wrote:
> Hi people,
> Do you have pointers to web documents that help me make comparisons
> between buying a server with two quad core 2.33 ghz or buying a 4 dual
> core 2ghz server?
> I am trying to answer a question of performance. It is not important
> the redundancy/failover or the price of the server. Just the
> performance.
> obviously all the hardware specs are the same, the question is the CPU.

If you do pure IO workloads, the 4 dual cores are probably going to be as fast 
as the 2 quads because of the clock differences. 

For CPU bound workloads, the quad cores will beat the duals easily because of 
the higher clock speed (and more efficient caching in case of AMD).

The only other things I would worry about is the number of memory slots. 
Usually boards that have 4 cpu sockets have a larger number of memory slots 
too. So if you need lots of ram, you're better off on that. 


Peter.
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[CentOS] Re: SELinux question - to fix bug in Webmin

[Lanny Marcus]

On 30 August 2007, Kenneth Porter <[EMAIL PROTECTED]> wrote:
> Message: 75

> You might also want to direct your question to the SELinux people on
> their lists:
> 
> 
> 
> 
> (I'm curious to know what the solution is, though, so please follow up
> back here with anything you find!)

Ken: I posted on the fedora-selinux-list  Below is the reply from Daniel
J. Walsh at Redhat. Lanny

> This explanation and description of the problem are fine.  We probably
> need a custom policy for webmin to allow iptables to write to scripts
> running as webmin, since catching stderr is important.   There is no
> file context that can be set to allow this.  As I recall from the
> original bug report, iptables was also trying to communicate with
> another open file descriptor.  This one I beleive should be closed on
> exec.

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[CentOS] cannot find mcrypt rpm

[Melinda Odom]

Hi,

I need this to install for a new ecommerce store I want to test out:
mcrypt for extension=php_mcrypt.dll in php.ini

Do you know where I can get this rpm? I cannot find it on the CentOS
repository.

I am using php 5.2.3-4 and mysql 4.1.20 on CentOS 4.3.

Thank you!

Sincerely,
Melinda Odom
Design Hosting, Inc.
www.designhosting.biz
479-471-0891



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Checked by AVG Free Edition. 
Version: 7.5.484 / Virus Database: 269.13.1/982 - Release Date: 8/31/2007
5:21 PM
 
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Re: [CentOS] cannot find mcrypt rpm

[Alexander Dalloz]

Melinda Odom schrieb:
> Hi,
> 
> I need this to install for a new ecommerce store I want to test out:
> mcrypt for extension=php_mcrypt.dll in php.ini

extension=mcrypt.so

CentOS is *NIX world, not .dll hell.

> Do you know where I can get this rpm? I cannot find it on the CentOS
> repository.
> 
> I am using php 5.2.3-4 and mysql 4.1.20 on CentOS 4.3.

You are hopefully not running CentOS 4.3!

The PHP version you run does not come with CentOS. The centosplus
repository lists php-5.1.6-3.el4s1.7.i386.rpm as the current one. And
that repo provides php-mcrypt, together with libmcrypt.

> Thank you!
> 
> Sincerely,
> Melinda Odom

Alexander

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Re: [CentOS] Re: OT: Suggestions for RAID HW for 2 SATA drives in

[Lanny Marcus]

On 31 August 2007, Phil Schaffner <[EMAIL PROTECTED]> wrote:
> Message: 21

> As discussed recently on-list, VMware CPU requirements to support
> virtualization are not nearly so rigorous as for Xen.  You are
> probably OK with VMware on most any relatively modern x86 or x86_64
> CPU.
> http://lists.centos.org/pipermail/centos/2007-August/085796.html

Phil: Thanks. I remember reading that post. I will do some reading.
Lanny

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Subject: Re:[CentOS] SELinux question - to fix bug in Webmin

[Lanny Marcus]

On 30 August 2007, Kenneth Porter <[EMAIL PROTECTED]> wrote:

> (I'm curious to know what the solution is, though, so please follow up
> back here with anything you find!)

Below is the latest message from Jamie Cameron:

> Ok, it sounds like this will be more complex that I thought if they
> need to add a custom policy just for Webmin. It runs quite a few
> commands that could log errors to /var/webmin/miniserv.error ..
> 
> Regarding the other file descriptors, based on your testing and mine
> with the lsof command, it looks like this issue is fixed in the latest
> Webmin release, as there doesn't appear to be any handles open to
> /var/webmin/sessiondb.* anymore.

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[CentOS] apache mod_jk?

[John Hinton]

Is this really not in CentOS 5? or maybe buried in javaland somewhere?

thanks,
John Hinton
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Re: [CentOS] CentOS 5 (64) Gnome - not detecting Optical Mouse

[Lukasz]

User Siva GNU/Linux wrote:

Hi
I am using CentOS 5 64bit, i can install successfully on the below hardware.
while booting i can see the Pointer and use Mouse. But While i get a Login
screen I couldn't see the pointer, after login also i can't. when i press
CTRL button, it shows where the pointer is.. What should i do to enable and
work with Mouse.


is it USB or PS2 mouse?

this looks like gnome issue, sunce mouse is visible while rhgb 
running, but mouse can be configured directly in file 
/etc/X11/xorg.conf; can you send us context of this file?


also, you can disable rhgb; check the file /boot/grub/menu.lst 
and (after backup to /root/important/ or other safe from users 
directory) and delete every "rhgb" you find



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