Re: [CentOS] Enabling X on headless server via network

2010-07-25 Thread Chan Chung Hang Christopher
Dotan Cohen wrote: > On Sun, Jul 25, 2010 at 19:35, Stephen Harris wrote: >> Which shows it's working... but painfully slowly. Bandwidth and especially >> latency is killing you. >> > > Other than getting a new ISP, is there anything that I can do about the > latency? I can smoothly run X over

Re: [CentOS] Desktop Supercomputer

2010-07-17 Thread Chan Chung Hang Christopher
Rajagopal Swaminathan wrote: > Greetings, > > Thanks Les for your reply. (I dont top-post normally, but this was an > emergency) Emergency? Sorry, but your posts are leading me to think that you have lost it. >> Have you looked at Ubuntu's setup? I don't think it deals with GPU's but it >> m

Re: [CentOS] Redundant LAN routing possible?

2010-07-11 Thread Chan Chung Hang Christopher
> Idea being that the dumb switches are used solely for local data > transfer between up to X number of App servers and storage nodes. The > managed switch then handles only external communications as well as > any firewalling. Oh you have dumb switches in the mix? Not going to work as Gordon has

Re: [CentOS] Redundant LAN routing possible?

2010-07-11 Thread Chan Chung Hang Christopher
Emmanuel Noobadmin wrote: > Thanks for the suggestion, I'll read up more about them. The > bond0 and just works sounds simple which is a Good Thing! The problem > was the last time I tried to cross connect multiple switches, > everything just died so there must be something a bit more involved? >

Re: [CentOS] Networking just stopped working

2010-07-08 Thread Chan Chung Hang Christopher
Les Mikesell wrote: > Chan Chung Hang Christopher wrote: >> Christopher Chan wrote: >>> On Thursday, July 08, 2010 05:09 PM, Kahlil Hodgson wrote: >>>> On 07/08/2010 05:08 PM, Christopher Chan wrote: >>>>>> Hmmm ... which bond mode are you using? &g

Re: [CentOS] Networking just stopped working

2010-07-08 Thread Chan Chung Hang Christopher
JohnS wrote: > On Thu, 2010-07-08 at 07:51 -0500, Les Mikesell wrote: >> I think some bridge or vlan scenarios require promiscuous mode (and the >> corresponding disabling of hardware acceleration). Maybe the real issue is >> that >> something accidentally disabled it and you now only work wh

Re: [CentOS] Networking just stopped working

2010-07-08 Thread Chan Chung Hang Christopher
Hakan Koseoglu wrote: > HiChristopher, > > On 08/07/10 10:25, Christopher Chan wrote: Why mode 4 of course. >> Huh? Like why? It's the recommended mode unless the switch does not >> suppoprt it or the boards don't. > I never realised this is the recommended mode. Do you have pointers > where

Re: [CentOS] Networking just stopped working

2010-07-08 Thread Chan Chung Hang Christopher
Christopher Chan wrote: > On Thursday, July 08, 2010 05:09 PM, Kahlil Hodgson wrote: >> On 07/08/2010 05:08 PM, Christopher Chan wrote: Hmmm ... which bond mode are you using? >>> Why mode 4 of course. >> Ouch. Never used that mode. > > Huh? Like why? It's the recommended mode unless the swi

Re: [CentOS] DNS or firewall problem

2010-07-06 Thread Chan Chung Hang Christopher
>> Are you running a proxy for http? It would be rather >> surprising that internal machines can access the Internet >> without forwarding turned on otherwise. When you say internal >> machines cannot access your server, are they connecting to it >> via the local interface's ip or the Internet

Re: [CentOS] Networking just stopped working

2010-07-06 Thread Chan Chung Hang Christopher
Les Mikesell wrote: > Chan Chung Hang Christopher wrote: >> Christopher Chan wrote: >>> And now the thing is working again... >> It's not working again. >> >> Running tcpdump -i vlan seems to trigger something to get the network >> working again b

Re: [CentOS] Networking just stopped working

2010-07-06 Thread Chan Chung Hang Christopher
Christopher Chan wrote: > And now the thing is working again... It's not working again. Running tcpdump -i vlan seems to trigger something to get the network working again but as soon as I stop tcpdump...nada, zip, zilch. Any ideas? I see no errors in the logs whether of the switch or the box,

Re: [CentOS] CentOS MD RAID 1 on Openfiler iSCSI

2010-06-29 Thread Chan Chung Hang Christopher
Emmanuel Noobadmin wrote: > On 6/29/10, Chan Chung Hang Christopher > wrote: >> gluster don't care about underlying filesystem...it don't support acl >> yet for a reason > > Could you elaborate on that? Although at the moment I don't appear to > have a

Re: [CentOS] CentOS MD RAID 1 on Openfiler iSCSI

2010-06-29 Thread Chan Chung Hang Christopher
Emmanuel Noobadmin wrote: > On 6/29/10, Christopher Chan wrote: >> raid1/iscsi if you have a single host accessing the data or gluster if >> you have more than one host accessing the data... > > This is starting to look really complicated with NCP Storage units on > zfs -> iscsi to gluster unit e

Re: [CentOS] LSI software raid with centos 5.4

2010-05-25 Thread Chan Chung Hang Christopher
CList wrote: >>> I have been trying to install CentOS 5.4 on a Intel SR1530SHS, Intel > S3200SH >>> mainboard.. It has a 3 x 1TB sata hotswap drives with LSI software raid >>> onboard. >> fake-raid alert! >> >>> I had configured the LSI to have Sata0 and Sata1 with raid 1 and the > third >>> drive

Re: [CentOS] LSI software raid with centos 5.4

2010-05-24 Thread Chan Chung Hang Christopher
CList wrote: > Hi, > > I have been trying to install CentOS 5.4 on a Intel SR1530SHS, Intel S3200SH > mainboard.. It has a 3 x 1TB sata hotswap drives with LSI software raid > onboard. fake-raid alert! > > I had configured the LSI to have Sata0 and Sata1 with raid 1 and the third > drive as a

Re: [CentOS] Benchmark Disk IO

2010-05-06 Thread Chan Chung Hang Christopher
Les Mikesell wrote: > On 5/5/2010 12:00 PM, Karanbir Singh wrote: >>> Try to run the same IO operations as your production server is running. >>> Bonnie++ could be good application for benchmarking. Also run some >>> parallel rsync, rm, find, etc proccesses. >>> >> I am with John Pierce on this one

Re: [CentOS] [SOLVED] Re: Installing a CentOS based distro with Raid driver - Citrix XenServer

2010-05-05 Thread Chan Chung Hang Christopher
Georghy wrote: > Chan Chung Hang Christopher a écrit : >> xe dd (assuming you have a floppy [is usb supported?] disk with the drivers) >> > A floppy isn't enough because the driver is about 2.7Mb so I use a USB > Stick. It should be the same with a Floppy. >>&g

Re: [CentOS] [SOLVED] Re: Installing a CentOS based distro with Raid driver - Citrix XenServer

2010-05-05 Thread Chan Chung Hang Christopher
Georghy wrote: > Chan Chung Hang Christopher a écrit : >> Georghy wrote: >> >>> Tru Huynh a écrit : >>> >>>> On Tue, May 04, 2010 at 03:03:00PM +0200, Georghy wrote: >>>> >>>> >>>>> (1)Downloa

Re: [CentOS] [SOLVED] Re: Installing a CentOS based distro with Raid driver - Citrix XenServer

2010-05-05 Thread Chan Chung Hang Christopher
Georghy wrote: > Tru Huynh a écrit : >> On Tue, May 04, 2010 at 03:03:00PM +0200, Georghy wrote: >> >>> (1)Download that driver : >>> http://downloadcenter.intel.com/Detail_Desc.aspx?agr=Y&ProdId=3117&DwnldID=18570&lang=fra >>> from the intel support web site >>> >>> >> You should have sta

Re: [CentOS] OT: Caching synchronous writes

2010-04-23 Thread Chan Chung Hang Christopher
Jure Pečar wrote: >>> Ray Van Dolson wrote: > I think what you want is a proper storage array with mirrored write > cache. > > When ext3 came into widespread use, a popular method to "cache" frequent > fsyncs was to run it in a full data journaling mode, with external journal on > a sepa

Re: [CentOS] CentOS5 and samba

2010-04-16 Thread Chan Chung Hang Christopher
Brian Sr wrote: > On Fri, 2010-04-16 at 14:29 +0100, lheck...@users.sourceforge.net wrote: >>> Here's a question: are you using your old configuration files? You might >>> want to compare the default from the install with the old ones - there may >>> be deprecated or defunct or invalid options. >>

Re: [CentOS] RAID 5 setup?

2010-03-26 Thread Chan Chung Hang Christopher
Benjamin Franz wrote: > Robert Heller wrote: >> I suspect that this is a simular case to what I did: I have a server >> with 4 drives. I have several (small) RAID1 partitions (/boot, /, >> /usr, /var, etc.) with 4 mirrors and one large RAID5 with three >> partitions and a hot spare (a LVM volumn g

Re: [CentOS] RAID 5 setup?

2010-03-26 Thread Chan Chung Hang Christopher
Benjamin Franz wrote: > Ross Walker wrote: >> No, not yet, but I always recommend setting up your data arrays >> manually so your intimately familiar with how they are constructed and >> the mdadm command usage is fresh in your head. >> >> Did you know with Neil's raid10 implementation you can

Re: [CentOS] MySQL max clustering package?

2010-03-17 Thread Chan Chung Hang Christopher
JohnS wrote: > On Tue, 2010-03-16 at 23:19 -0500, Neil Aggarwal wrote: >>> Mysql by itself has built in "clustering" though >>> there can be significant limitations in it depending on your >>> requirements. >> I agree. The built in cluster has too many limitations to >> be useful, but MySQL master

Re: [CentOS] Exim VS Postfix (no flame wars please)

2010-03-09 Thread Chan Chung Hang Christopher
Rudi Ahlers wrote: > Can anyone, who has used both Postfix & Exim please share some experience > with me? Which of these 2 did you prefer to use, and why? I have not used exim but I know someone who swears by it. It is highly configurable and had stuff like sender based routing before postfix did

Re: [CentOS] Motherboards for HPC applications

2010-03-09 Thread Chan Chung Hang Christopher
Eduardo Grosclaude wrote: > On Tue, Mar 9, 2010 at 12:49 AM, Christopher Chan > wrote: >> On Tuesday, March 09, 2010 12:34 AM, Eduardo Grosclaude wrote: >>> Hello, >>> Can somebody recommend CentOS-OK, dual socket motherboards for compute >>> elements? A quick look up at Intel pages suggests they

Re: [CentOS] Email Problem

2010-02-26 Thread Chan Chung Hang Christopher
Mihai T. Lazarescu wrote: > On Fri, Feb 26, 2010 at 10:34:34AM -0400, Susan Day wrote: > >> On Fri, Feb 26, 2010 at 9:51 AM, Simon Billis wrote: >> Why? >>> That is a good question - I "guess" that google's email system thinks >>> you're >>> sending them spam. If you want your mail to be acc

Re: [CentOS] Email Problem

2010-02-26 Thread Chan Chung Hang Christopher
Brian Mathis wrote: > On Fri, Feb 26, 2010 at 10:13 AM, Dominik Zyla wrote: > >> And please, stop send mails with html encoding. >> >> -- >> Dominik Zyla >> > > No, do not stop sending emails with HTML encoding. > > Welcome to the second decade of the 21st century. We may not have flying > car

Re: [CentOS] Email Problem

2010-02-26 Thread Chan Chung Hang Christopher
Kai Schaetzl wrote: > Chan Chung Hang Christopher wrote on Fri, 26 Feb 2010 22:01:28 +0800: > >> Programmers always have a hard time picking up on the >> system admin side of things. > > Still they should be able to find the best avenue for their questions, or > not

Re: [CentOS] Email Problem

2010-02-26 Thread Chan Chung Hang Christopher
Kai Schaetzl wrote: > Susan Day wrote on Fri, 26 Feb 2010 09:25:38 -0400: > >> Sorry, but this has NOT been my experience. I just tried that list >> __last_week__ and __no__ responses, no activity, either. > > Maybe that's because of the nature of your questions. I get the impression > that you

Re: [CentOS] Email Problem

2010-02-26 Thread Chan Chung Hang Christopher
Chan Chung Hang Christopher wrote: >>> postfix has a very active mailing list -- the originator and primary >>> developer, Wietse Venema,responds to posts quite often, as well as >>> many other postfix experts. >>> >>> http://www.postfix.org/lis

Re: [CentOS] Email Problem

2010-02-26 Thread Chan Chung Hang Christopher
>> postfix has a very active mailing list -- the originator and primary >> developer, Wietse Venema,responds to posts quite often, as well as >> many other postfix experts. >> >> http://www.postfix.org/lists.html > > > Sorry, but this has NOT been my experience. I just tried that list > __last_w

Re: [CentOS] Email Problem

2010-02-26 Thread Chan Chung Hang Christopher
B.J. McClure wrote: > On Fri, 2010-02-26 at 08:57 -0400, Susan Day wrote: > > > >> With respect to Kai's suggestion I find a qmail list, I'm sorry to say >> there don't appear to be ANY discussion lists for ANY email servers >> that are active. I'm desperate to get this working. >> TIA, >> Suzie

Re: [CentOS] Email Problem

2010-02-26 Thread Chan Chung Hang Christopher
Susan Day wrote: > On Fri, Feb 26, 2010 at 8:29 AM, Eero Volotinen wrote: > >> 2010/2/26 Susan Day : >>> Hi; >>> The following message appears to have been sent, but in fact never does >>> reach their destination: >>> >>> [root qmail-send]# tail current >>> >>> @40004b87b3d3392cbddc new msg 97

Re: [CentOS] tcpserver on port 25

2010-02-24 Thread Chan Chung Hang Christopher
>> Susan, is qmail-send running? tcpserver is used to run qmail-smtpd to >> accept emails but qmail-send does the actual queue processing and delivery. >> > 27755 ?S 0:00 multilog t s10 n20 /var/log/qmail/qmail-send Susan, why do you say the email server is broken? 'tail -f /var

Re: [CentOS] tcpserver on port 25

2010-02-24 Thread Chan Chung Hang Christopher
Eero Volotinen wrote: > 2010/2/24 Susan Day : >> Hi; >> [r...@13gems beno]# netstat -ltnup >> Active Internet connections (only servers) >> Proto Recv-Q Send-Q Local Address Foreign Address >> State PID/Program name >> tcp0 0 0.0.0.0:33060.0.0.0:* >>

Re: [CentOS] Server HD failed and I think I am hosed

2010-02-19 Thread Chan Chung Hang Christopher
m.r...@5-cent.us wrote: Also, what would have caused this all of the sudden? This box has been running fine for months. >>> Well, do you think that computer hardware lives forever? >>> >> They don't? /me stares at 486dx with a working floppy drive and working >> floppies from the eighties

Re: [CentOS] Server HD failed and I think I am hosed

2010-02-19 Thread Chan Chung Hang Christopher
>> Also, what would have caused this all of the sudden? This box has been >> running fine for months. > > Well, do you think that computer hardware lives forever? > They don't? /me stares at 486dx with a working floppy drive and working floppies from the eighties and early nineties. _

Re: [CentOS] CentOS 5.4 x86_64 authenticating against AD (Server 2008r2)

2010-02-11 Thread Chan Chung Hang Christopher
Craig White wrote: > On Wed, 2010-02-10 at 09:50 -0500, Ross Walker wrote: >> On Feb 10, 2010, at 8:11 AM, Chan Chung Hang Christopher >> > > wrote: >> >>>> If you have hundreds or thousands of users and hundreds of groups, >>>> well good luc

Re: [CentOS] CentOS 5.4 x86_64 authenticating against AD (Server 2008r2)

2010-02-10 Thread Chan Chung Hang Christopher
> If you have hundreds or thousands of users and hundreds of groups, > well good luck. It is extremely hard to automate assigning these uids/ > gids and making sure they don't collide with each other or other unix > systems and doing it by hand is a torture reserved for the ninth > circle o

Re: [CentOS] CentOS 5.4 x86_64 authenticating against AD (Server 2008r2)

2010-02-05 Thread Chan Chung Hang Christopher
> Wbinfo -u & wbinfo -g do indeed work for me however getent passwd or getent > group returns no AD users or groups. I have winbind entries in nsswitch for > both the passwd & group entries. Josepeh, I will try a newer RPM from a > different repository and see if that resolves my issues. Did my

Re: [CentOS] Virtualization software to install Windows as guest on CentOS 5 as host ?

2010-02-04 Thread Chan Chung Hang Christopher
Sergej Kandyla wrote: > Christopher Chan wrote: >> On Thursday, February 04, 2010 03:48 PM, Hadi Motamedi wrote: >> >>> Dear All >>> I need to install Windows as guest on my CentOS 5 as host . Can you >>> please give me the link to download the requierd rpm package for this >>> purpose ? >>> Tha

Re: [CentOS] Centos/Linux Disk Caching, might be OT in some ways

2010-01-27 Thread Chan Chung Hang Christopher
>> Ah, well #1 on his list then is to figure out what he is running! > > LOL, I know it sounds quite noobish, coming across like I've no idea > what DBMS it is running on. The system currently runs on MySQL but > part of my update requirement was to decouple the DBMS so that we can > make an even

Re: [CentOS] The directory that I am trying to clean up is huge

2010-01-25 Thread Chan Chung Hang Christopher
Anas Alnaffar wrote: > I tried to run this command > > find -name "*.access*" -mtime +2 -exec rm {} \; > Should have been: find ./ -name \*.access\* -mtime +2 -exec rm -f {} \; ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/l

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

2010-01-13 Thread Chan Chung Hang Christopher
> On the machine where I had the problem I had to run memtest86 more than a day > to > finally catch it. Then after replacing the RAM and fsck'ing the volume, I > still > had mysterious problems about once a month until I realized that the disks > are > accessed alternately and the fsck pas

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

2010-01-12 Thread Chan Chung Hang Christopher
ded a 4-port Intel Gigabit adapter too but that is of no consequence with storage right now. > > Regards > Per Qvindesland > > At Tisdag, 12-01-2010 on 11:57 "Chan Chung Hang Christopher" wrote: > > Karanbir Singh wrote: >> On 12/01/10 00:02, Christopher Chan wro

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

2010-01-12 Thread Chan Chung Hang Christopher
Benjamin Donnachie wrote: > 2010/1/12 Chan Chung Hang Christopher : >> Eeek! That thing will be hosting the school's vle. Looks like I better >> memorize the after hours password for HP support. > > I have had lots[1] of problems lately with DIMMs becoming defective

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

2010-01-12 Thread Chan Chung Hang Christopher
>> Which is why I specifically said 'performance wise' as respects 3ware. I >> don't remember anything bad about 3ware stability wise or monitoring wise. > > Is that supposed to be a joke? 3ware has certainly had their fair share of > stability problems (drive time-outs, bbu-problems, inconsiste

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

2010-01-12 Thread Chan Chung Hang Christopher
Karanbir Singh wrote: > On 12/01/10 00:02, Christopher Chan wrote: >>> problems mostly centered around management and performance issues. the >>> world is littered with stores of cciss fail >> Really? Man, I have been given this spanking new HP DL370 G6 and running >> Centos 5.4 on it... > > I'v

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

2010-01-08 Thread Chan Chung Hang Christopher
> " Maximum 3.5" hot-swap drives density 36x (24 front + 12 rear) HDD bays" > > http://www.supermicro.com/products/chassis/4U/847/SC847A-R1400.cfm > > Did anybody else think "WTF?" when you saw that picture? > > I have seen crazy stuff, but that one is pretty high-up on the list > > Doesn'

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

2010-01-07 Thread 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? > > Dep

Re: [CentOS] Find reason for heavy load

2009-12-31 Thread Chan Chung Hang Christopher
Noob Centos Admin wrote: > Hi, > >> Yes, these figures indicate that you are fairly close to being cpu bound. >> >> What kind of filtering are you doing? If you have any connection >> tracking/state related rules set, you will need to be using a fair >> amount of cpu. > > Initially, when the load

Re: [CentOS] Find reason for heavy load

2009-12-31 Thread Chan Chung Hang Christopher
Christoph Maser wrote: > Am Donnerstag, den 31.12.2009, 12:34 +0100 schrieb Chan Chung Hang > Christopher: >>>> Look at the first two columns. What column have higher numbers? If r, >>>> you're CPU-bound. If b, you're I/O bound. >>> pr

Re: [CentOS] Find reason for heavy load

2009-12-31 Thread Chan Chung Hang Christopher
>> Look at the first two columns. What column have higher numbers? If r, >> you're CPU-bound. If b, you're I/O bound. > > procs ---memory-- ---swap-- -io --system-- > -cpu-- > r b swpd free buff cache si sobibo in cs us sy id wa > st >

Re: [CentOS] Optimizing CentOS for gigabit firewall

2009-12-20 Thread Chan Chung Hang Christopher
Peter Serwe wrote: > I'll second damn near everything nate said, and hopefully add a tidbit or > two. > > If you're new to BSD, you may want to consider the pfsense project in the > aforementioned active-active configuration. > > It gives you a nice, intuitive gui to manage your failover firewall

Re: [CentOS] Optimizing CentOS for gigabit firewall

2009-12-20 Thread Chan Chung Hang Christopher
sadas sadas wrote: > The syntax is not a problem. The problem is in the performance. I suppose > that if I configure OpenBSD to process the in/out packets only to layer 2 the > performance will be much more than linux with iptables. > You know SQUAT about filtering on Linux. You want a bridg

Re: [CentOS] Optimizing CentOS for gigabit firewall

2009-12-20 Thread Chan Chung Hang Christopher
Les Mikesell wrote: > Timo Schoeler wrote: >>> What about NetBSD? I heard that NetBSD has the best network stack out >>> there. Maybe NetBSD with pf is the best choice? >> NetBSD is a very nice OS, I personally like it most (out of all BSDs out >> there); however, as can be read on >> >> http://www

Re: [CentOS] LVM, usb drives, Active Directory

2009-12-16 Thread Chan Chung Hang Christopher
Steve Thompson wrote: > On Wed, 16 Dec 2009, Chan Chung Hang Christopher wrote: > >> Steve Thompson wrote: >>> On Tue, 15 Dec 2009, Scott Ehrlich wrote: >>> >>>> I have a client with a handful of USB drives connected to a CentOS >>>> box. I

Re: [CentOS] LVM, usb drives, Active Directory

2009-12-16 Thread Chan Chung Hang Christopher
Scott Ehrlich wrote: > I have a client with a handful of USB drives connected to a CentOS > box. I am charged with binding the USB drives together into a single > LVM for a cheap storage data pool (10 x 1 TB usb drives = 10 TB cheap > storage in a single mount point). How about eSATA? Surely an

Re: [CentOS] LVM, usb drives, Active Directory

2009-12-16 Thread Chan Chung Hang Christopher
Steve Thompson wrote: > On Tue, 15 Dec 2009, Scott Ehrlich wrote: > >> I have a client with a handful of USB drives connected to a CentOS >> box. I am charged with binding the USB drives together into a single >> LVM for a cheap storage data pool (10 x 1 TB usb drives = 10 TB cheap >> storage in

Re: [CentOS] Using (was: Announcing) Gluster Storage Platform

2009-12-16 Thread Chan Chung Hang Christopher
Alan McKay wrote: > On Tue, Dec 15, 2009 at 7:48 PM, Christopher Chan > wrote: >> A cluster filesystem > > OK, but you've just given me a circular definition. > >> When you do not need/want a cluster file system > > and again ... > Okay, a cluster/distributed file system that does not have it

Re: [CentOS] Is ext4 safe for a production server?

2009-12-13 Thread Chan Chung Hang Christopher
>> Write barriers were introduced to give data guarantees with hard drives >> that have their write cache enabled. Unfortunately, not everything has >> been given barrier support. LVM and JFS do not have write barrier support. >> >> > > https://www.redhat.com/archives/dm-devel/2009-December

Re: [CentOS] XFS and LVM2 (possibly in the scenario of snapshots)

2009-12-10 Thread Chan Chung Hang Christopher
Mathieu Baudier wrote: >> LVM like md raid and drbd is a layered block device and >> If you turn the wire caches off on the HDs then there is no problem, >> but HDs aren't designed to perform to spec with the write cache >> disabled they expect important data is written with FUA access (forced >> u

Re: [CentOS] XFS and LVM2 (possibly in the scenario of snapshots)

2009-12-10 Thread Chan Chung Hang Christopher
Timo Schoeler wrote: > [off list] > > > Thanks for your eMail, Ross. So, reading all the stuff here I'm really > concerned about moving all our data to such a system. The reason we're > moving is mainly, but not only the longisch fsck UFS (FreeBSD) needs > after a crash. XFS s

Re: [CentOS] Is ext4 safe for a production server?

2009-12-08 Thread Chan Chung Hang Christopher
Timo Schoeler wrote: > thus Chan Chung Hang Christopher spake: > >> Timo Schoeler wrote: >> >>> thus Christopher Chan spake: >>> >>> >>>> Ian Forde wrote: >>>> >>

Re: [CentOS] Is ext4 safe for a production server?

2009-12-08 Thread Chan Chung Hang Christopher
Timo Schoeler wrote: > thus Christopher Chan spake: > >> Ian Forde wrote: >> >>> On Dec 7, 2009, at 10:30 AM, Florin Andrei >>> wrote: >>> >>> John R Pierce wrote: > I've always avoided XFS because A) it wsan't supported natively in > RHEL > anyway

Re: [CentOS] Is ext4 safe for a production server?

2009-12-05 Thread Chan Chung Hang Christopher
John R Pierce wrote: > Timo Schoeler wrote: > >> For enterprise environments my favorite FS is XFS, YMMV, though. >> >> > > I've always avoided XFS because A) it wsan't supported natively in RHEL > anyways, and B) I've heard far too many stories about catastrophic loss > problems and d

Re: [CentOS] Is ext4 safe for a production server?

2009-12-05 Thread Chan Chung Hang Christopher
Jure Pečar wrote: > On Sat, 05 Dec 2009 10:48:56 -0800 > John R Pierce wrote: > > >> Timo Schoeler wrote: >> >>> For enterprise environments my favorite FS is XFS, YMMV, though. >>> >>> >> I've always avoided XFS because A) it wsan't supported natively in RHEL >> anyways, and B)

Re: [CentOS] Is ext4 safe for a production server?

2009-12-05 Thread Chan Chung Hang Christopher
Miguel Medalha wrote: > I am about to install a new server running CentOS 5.4. The server will > contain pretty critical data that we can't afford to corrupt. > > I would like to benefit from the extra speed and features of a ext4 > filesystem but I don't have any experience with it. > Is there s

Re: [CentOS] recommend benchmarking SW

2009-11-03 Thread Chan Chung Hang Christopher
Alan McKay wrote: > Hey folks, > > We've got some new hardware and are trying to figure out what best to > do with it. Either run CentOS right on the bare metal, or > virtualize, or several combination options. Mainly looking at : > > - CentOS on bare metal > - CentOS on ESXi 4.0 with local dis

Re: [CentOS] RAID 10 on Install?

2009-10-31 Thread Chan Chung Hang Christopher
Neil Aggarwal wrote: >> How can I RAID 10 on install? >> > > Does anyone know if this approach: > http://www.howtoforge.com/install-ubuntu-with-software-raid-10 > > Will work for CentOS? > Never tried the Centos LiveCD so I cannot say but manually creating the raid1 arrays and then stripi

Re: [CentOS] RAID 10 on Install?

2009-10-31 Thread Chan Chung Hang Christopher
ML wrote: > People went back and forth on the list saying that if a hardware > controller was out of the budget right now RAID 10 would be the best > solution. > That is raid1+0. raid10, under md, is something else different from raid1+0. > It seems that the installer wont let you create t

Re: [CentOS] To all of the group

2009-10-22 Thread Chan Chung Hang Christopher
James Bensley wrote: > 2009/10/22 Chan Chung Hang Christopher > > >> Sorry, got mixed up. I thought he was talking about what he was doing >> for his company. Just kind of wary of people who go: Calling all Hackers >> but they actually mean Calling all Crackers >

Re: [CentOS] To all of the group

2009-10-22 Thread Chan Chung Hang Christopher
James Bensley wrote: > Wait a minute, didn't someone just try and offer their help to the > community; > Where in their email did they mention cpanel? > Sorry, got mixed up. I thought he was talking about what he was doing for his company. Just kind of wary of people who go: Calling all Hacker

Re: [CentOS] sendmail question

2009-10-21 Thread Chan Chung Hang Christopher
Jerry Geis wrote: > Hi all, > > I have a local user account call "panel" on a machine. > When I use the mail command to manually send email to the panel account > it over 1 minute until that mail actually deposited in the mail account. > > What setting is that reduces this time? > > I changed /etc/

Re: [CentOS] using CentOS as an iSCSI server?

2009-10-21 Thread Chan Chung Hang Christopher
Rainer Duffner wrote: > Chan Chung Hang Christopher schrieb: > >> I suspect so. After all, it is just seen as a disk as far as md is >> concerned and it will do the same normal thing if you unplugged a single >> disk from the array. >> >> > &

Re: [CentOS] using CentOS as an iSCSI server?

2009-10-21 Thread Chan Chung Hang Christopher
Jonathan Moore wrote: > On Wed, Oct 21, 2009 at 7:51 AM, Les Mikesell wrote: > >> You can, if you connect the iscsi block devices into one machine that can >> combine them in one or more md raid devices, put a filesystem on them, and >> export via nfs and/or smb to the systems that want shared

Re: [CentOS] [OT] DHCP auth&auth software

2009-10-19 Thread Chan Chung Hang Christopher
Marko Vojinovic wrote: > Does anyone know about some free (as in beer, and maybe as in speech) > software > which would implement authentication and authorization of a user prior to > issuing a valid dhcp lease? > > I imagine the following scenario: someone walks into my office building with >

Re: [CentOS] CentOS 5.4? anyone?

2009-10-16 Thread Chan Chung Hang Christopher
Toby Bluhm wrote: > You Centos guys just aren't getting the message are you? > > We need to know EXACTLY what is going on with the release! None of this > "soon" crap will do. Please post a progress report on packages built, > isos transfered, server update progress by region, hours worked, > ke

Re: [CentOS] test

2009-10-05 Thread Chan Chung Hang Christopher
Janez Kosmrlj wrote: > testing mail delivery > > deliver failure: 550 Administrative Prohibition ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos

Re: [CentOS] Asterisk and VOIP was Re: CentOS for non-tech user

2009-09-30 Thread Chan Chung Hang Christopher
>> When you say go voip, do you mean use sip for the stations only or also >> for the trunks? >> > > My experience (and the experience of those I know) is that SIP trunks > don't really work consistently. But, when I say I need to learn VOIP > I'm mostly talking about the station side. My goa

Re: [CentOS] Asterisk and VOIP was Re: CentOS for non-tech user

2009-09-30 Thread Chan Chung Hang Christopher
>> You can get asterisk packages from rpmforge on Centos...but on Ubuntu >> you do not have to add an extra repository to get asterisk. >> > > Don't bother with that, go straight to the source! > http://packages.asterisk.org/ > These get updated rather quickly. > Ah, now that will defini

[CentOS] Asterisk and VOIP was Re: CentOS for non-tech user

2009-09-30 Thread Chan Chung Hang Christopher
Ron Blizzard wrote: > On Tue, Sep 29, 2009 at 3:09 PM, Tait Clarridge wrote: > > >> CentOS is great for server use and if you want to learn CentOS for use >> as a server, Fedora is a great place to start because they are both >> redhat based. Chances are that if you got something to work in Fed

Re: [CentOS] CentOS for non-tech user

2009-09-29 Thread Chan Chung Hang Christopher
Niki Kovacs wrote: > Geoff Galitz a écrit : > > >> Ubuntu has the LTS releases, which are long term stable releases. They are >> supported for five years after release. >> >> > Ubuntu Long Term Support is three years for desktops and five for servers. > > In the last LTS version (8.04), hal

Re: [CentOS] Centos 5.3 Kernel panic with fuse and glusterfs.

2009-09-15 Thread Chan Chung Hang Christopher
Tom O'Connor wrote: > Matthew Miller wrote: > >> On Tue, Sep 15, 2009 at 03:24:52PM +0100, Tom O'Connor wrote: >> >> >>> If anyone has any ideas for further debugging, or other routes for >>> support. I'm running out of ideas. >>> >>> >> Enterprise Linux 5.4 with included

Re: [CentOS] No envelope information

2009-09-15 Thread Chan Chung Hang Christopher
Luis campo wrote: > hi, > > have installed centos 4.7 > > We have installed qmail + simscan + vpopmail + SpamAssassin + clanAV > and when we send a mail from a particular domain, the following error leaves > us > > How about changing that combination of qmail + simscan to postfix + clamav-mi

Re: [CentOS] iptables

2009-09-15 Thread Chan Chung Hang Christopher
CentOS List wrote: > Hi, > > I have an existing iptables as follows:- > > # Firewall configuration written by system-config-securitylevel > # Manual customization of this file is not recommended. > *filter > :INPUT ACCEPT [0:0] > :FORWARD ACCEPT [0:0] > :OUTPUT ACCEPT [0:0] > :RH-Firewall-1-INPUT -

Re: [CentOS] [Found] CentOS is dead, long live CentOS

2009-09-14 Thread Chan Chung Hang Christopher
> However, we are NOT accepting monetary donations at this point. We will > not accept monetary donations until there is something in place where > more than one person has to approve any spending and some kind of > committee is in place to manage incoming and outgoing funds. > > ooh, ouch.

Re: [CentOS] using CentOS as an iSCSI server?

2009-09-07 Thread Chan Chung Hang Christopher
Joseph L. Casale wrote: >> Can I suggest ZFS on Solaris/OpenSolaris? Real breeze to setup. >> >> As for Linux, it has been a while but are there still two iscsi-target >> implementations? Has any one of them got into the mainline (Linux - not >> Redhat - although if Redhat will support one implemen

Re: [CentOS] using CentOS as an iSCSI server?

2009-09-07 Thread Chan Chung Hang Christopher
> chan, I already have CentOS 5.3 setup, and we need to use this as far > as possible, due to some of the other software that we'll be using. > > See Joseph Casale's post then. It is not quite available on Centos. Roll your own is the name of the game. ___

Re: [CentOS] using CentOS as an iSCSI server?

2009-09-07 Thread Chan Chung Hang Christopher
Rainer Duffner wrote: > Chan Chung Hang Christopher schrieb: > >> Rudi Ahlers wrote: >> >> >>> Has anyone succesfully setup, and used CentOS as an iSCSI server? I'm >>> trying to setup a server with 4x500GB HDD's, setup in RAID 1

Re: [CentOS] using CentOS as an iSCSI server?

2009-09-07 Thread Chan Chung Hang Christopher
Rudi Ahlers wrote: > Has anyone succesfully setup, and used CentOS as an iSCSI server? I'm > trying to setup a server with 4x500GB HDD's, setup in RAID 10 to act > as an iSCSI server for a virtualization project, but I can't find a > decent howto on how to setup an iSCSI server using CentOS. > > I

Re: [CentOS] looking for RAID 1+0 setup instructions?

2009-09-01 Thread Chan Chung Hang Christopher
I would NOT do that. You should like the md layer handle all things raid and let lvm do just volume management. >>> Your under the asumption that they are two different systems. >>> >>> >> You're under the assumption that they are not. >> > > http://en

Re: [CentOS] looking for RAID 1+0 setup instructions?

2009-08-31 Thread Chan Chung Hang Christopher
Miguel Medalha wrote: >>> You might be interested in this article: >>> >>> "Why is RAID 1+0 better than RAID 0+1?" >>> http://aput.net/~jheiss/raid10/ >>> >>> >>> >> The whole raid1+0 or raid0+1 argument was really only relevant in the >> days of pata when one disk dying on one chan

Re: [CentOS] what is the best way to delete so many queue files?

2009-08-31 Thread Chan Chung Hang Christopher
MontyRee wrote: > Hello, all. > > > I found that so many unnessary queue files are saved at > /var/spool/clientmqueue/ directory. > How do you know they are unnecessary? > > > I tested two way to delete these files. > > 1. > # rm -rf /var/spool/clientmqueue/* > > 2. > # cd /va

Re: [CentOS] Samba Question

2009-08-26 Thread Chan Chung Hang Christopher
> Now the Designers groups should have rw rights for Projects and subfolders > > The draghtsmen should be able to upload only files (not folders) to > Final subfolder. They are not allowed to modify/delete anything > anywhere. They will not have any permission in project folder > > any ideas? >

Re: [CentOS] How to tell if I've been hacked?

2009-08-23 Thread Chan Chung Hang Christopher
>> Also processes you thinkk you DO recognize: >> Just for testing how alert my co-workers were, i had a program called >> "kswapd", just calculating prime-numbers... >> They never noticed. ;-) >> >> Without any preperation it's harder. No point in installing tripwire, >> activating apparmor/selin

Re: [CentOS] OT: Strange message in root e-mail possiablly hacked!!! Not sure??

2009-08-17 Thread Chan Chung Hang Christopher
> I didn't know that IPCOP could run on one that old. I have one like > that up in the attic, time to bring it back down. Before I upgraded to > 5.3, I was running 4.7 with FireStarter and did not have any troubles. > As soon as I get some sleep I will be looking in to setting it up. > >

[CentOS] Centos - Chinese

2009-08-16 Thread Chan Chung Hang Christopher
A response I got from the local LUG here in Hong Kong to a post about translating the wiki articles into Chinese pointed me to the links below: http://www.centoschina.com/ http://apt.nc.hcc.edu.tw/web/student_server_centos/student_server_centos.html Posted just in case the Centos team has an iss

Re: [CentOS] OT: Strange message in root e-mail possiablly hacked!!! Not sure??

2009-08-16 Thread Chan Chung Hang Christopher
>> So I started looking around in /var/log. I looked at my secure logs and >> saw nothing out of the ordinary. I looked in samba and found a log file >> 58.239.84.158.log. I opened it up and it said the following: >> >> [2009/08/15 06:31:34, 0] lib/access.c:check_access(327) >> Denied conne

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