Hello all,
I am implementing a new mail server into our environment consisting of three machines - two Dell Opterons that will act as load balanced Postfix servers, and a 1.5TB RAID10 NFS server. All three machines are running CentOS 4.5.
Since the NFS is going to be used for only mail, I was kicking around the idea to use XFS. I have CentOS installed on an ext3 partition, and with the leftover space on the NFS I created an XFS partition. I tried to implement XFS into the kernel, and was coming across some issues. Even after installing xfprogs and xfsprogs-devel, and issuing the command:
yum --enable-plusrepos install kernel
I booted up the kernel and still could not mount my XFS share. I keep getting this error:
mount: fs type xfs not supported by kernel
After googling around (and not finding out how to get XFS enabled in the kernel), people had some concerns about using XFS due to issues and it being about as fast as ext3.
Also people said that I might run into issues with XFS if I run NFS+lvm+xfs+md but I'm not sure if I run lvm and md and if that applies to me.
I found this benchmarking blog someone wrote that compares the speeds in Ubuntu with all the filesystems in a Postfix server environment (although it's not NFS):
http://piao-tech.blogspot.com/2007/04/file-system-benchmarks-for-postfix-mai...
With all this said, I'd like to use XFS, if it indeed is going to be the fastest for the solution I want to implement. If you guys can help me get that installed by telling me what I need - great! If you think XFS isn't going to work as efficiently and fast as I want it to, and there is another filesystem (such as ext3) that will be more stable and just as fast in my setup, I'm all ears.
Thanks everyone in advance.
Patrick
On 7/21/07, Patrick - South Valley Internet patrickm@garlic.com wrote:
Hello all,
I am implementing a new mail server into our environment consisting of three machines - two Dell Opterons that will act as load balanced Postfix servers, and a 1.5TB RAID10 NFS server. All three machines are running CentOS 4.5.
Since the NFS is going to be used for only mail, I was kicking around the idea to use XFS. I have CentOS installed on an ext3 partition, and with the leftover space on the NFS I created an XFS partition. I tried to implement XFS into the kernel, and was coming across some issues. Even after installing xfprogs and xfsprogs-devel, and issuing the command:
yum --enable-plusrepos install kernel
I booted up the kernel and still could not mount my XFS share. I keep getting this error:
mount: fs type xfs not supported by kernel
You need to install kernel-module-xfs from the centosplus repo.
Akemi
Akemi Yagi wrote:
On 7/21/07, Patrick - South Valley Internet patrickm@garlic.com wrote:
Hello all,
I am implementing a new mail server into our environment consisting of three machines - two Dell Opterons that will act as load balanced Postfix servers, and a 1.5TB RAID10 NFS server. All three machines are running CentOS 4.5.
Since the NFS is going to be used for only mail, I was kicking around the idea to use XFS. I have CentOS installed on an ext3 partition, and with the leftover space on the NFS I created an XFS partition. I tried to implement XFS into the kernel, and was coming across some issues. Even after installing xfprogs and xfsprogs-devel, and issuing the command:
yum --enable-plusrepos install kernel
I booted up the kernel and still could not mount my XFS share. I keep getting this error:
mount: fs type xfs not supported by kernel
You need to install kernel-module-xfs from the centosplus repo.
Akemi _______________________________________________ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
I do that, then when I reboot I still get the:
mount: fs type xfs not supported by kernel
Any ideas what's going on?
Patrick
P.S. The command I was using to install was:
yum --enablerepo=centosplus install kernel-module-xfs
Do I need to issue any other commands as well?
I do that, then when I reboot I still get the:
mount: fs type xfs not supported by kernel
Any ideas what's going on?
Patrick
P.S. The command I was using to install was:
yum --enablerepo=centosplus install kernel-module-xfs
Do I need to issue any other commands as well?
The command looks ok. Did you see it installed? Do a :
rpm -qa | grep kernel
to confirm you have it.
Akemi
I see it just fine. Do I need to install the kernel from the plus repos as well?
Patrick
Akemi Yagi wrote:
I do that, then when I reboot I still get the:
mount: fs type xfs not supported by kernel
Any ideas what's going on?
Patrick
P.S. The command I was using to install was:
yum --enablerepo=centosplus install kernel-module-xfs
Do I need to issue any other commands as well?
The command looks ok. Did you see it installed? Do a :
rpm -qa | grep kernel
to confirm you have it.
Akemi _______________________________________________ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Patrick - South Valley Internet wrote:
I see it just fine. Do I need to install the kernel from the plus repos as well?
Patrick
Akemi Yagi wrote:
I do that, then when I reboot I still get the:
mount: fs type xfs not supported by kernel
Any ideas what's going on?
Patrick
P.S. The command I was using to install was:
yum --enablerepo=centosplus install kernel-module-xfs
Do I need to issue any other commands as well?
The command looks ok. Did you see it installed? Do a :
rpm -qa | grep kernel
to confirm you have it.
You just need to pick the kmod-xfs (or kernel-module-xfs) module for your running kernel.
uname -a will tell you the kernel, install the kernel module that matches that one exactly.
You do not need the plus kernel for XFS.
However, personally I would use ext3.
Johnny Hughes wrote:
Patrick - South Valley Internet wrote:
I see it just fine. Do I need to install the kernel from the plus repos as well?
Patrick
Akemi Yagi wrote:
I do that, then when I reboot I still get the:
mount: fs type xfs not supported by kernel
Any ideas what's going on?
Patrick
P.S. The command I was using to install was:
yum --enablerepo=centosplus install kernel-module-xfs
Do I need to issue any other commands as well?
The command looks ok. Did you see it installed? Do a :
rpm -qa | grep kernel
to confirm you have it.
You just need to pick the kmod-xfs (or kernel-module-xfs) module for your running kernel.
uname -a will tell you the kernel, install the kernel module that matches that one exactly.
You do not need the plus kernel for XFS.
I wanted to try XFS with the normal kernel but I get:
[root@turn29 ESRF]# uname -a Linux turn29.biologie.uni-konstanz.de 2.6.18-8.1.8.el5 #1 SMP Tue Jul 10 06:39:17 EDT 2007 x86_64 x86_64 x86_64 GNU/Linux [root@turn29 ESRF]# yum --enablerepo=centosplus install kmod-xfs.x86_64 Loading "protectbase" plugin Loading "installonlyn" plugin Setting up Install Process Setting up repositories Reading repository metadata in from local files 59 packages excluded due to repository protections Parsing package install arguments Resolving Dependencies --> Populating transaction set with selected packages. Please wait. ---> Package kmod-xfs.x86_64 0:0.4-1.2.6.18_8.1.8.el5.centos.plus set to be installed --> Running transaction check --> Processing Dependency: kernel-x86_64 = 2.6.18-8.1.8.el5.centos.plus for package: kmod-xfs --> Finished Dependency Resolution Error: Missing Dependency: kernel-x86_64 = 2.6.18-8.1.8.el5.centos.plus is needed by package kmod-xfs
So it appears like it _does_ need the plus kernel. Or am I doing anything wrong here?
Thx,
Kay
Kay Diederichs wrote:
[root@turn29 ESRF]# uname -a Linux turn29.biologie.uni-konstanz.de 2.6.18-8.1.8.el5 #1 SMP Tue Jul 10 06:39:17 EDT 2007 x86_64 x86_64 x86_64 GNU/Linux
--> Processing Dependency: kernel-x86_64 = 2.6.18-8.1.8.el5.centos.plus for package: kmod-xfs --> Finished Dependency Resolution Error: Missing Dependency: kernel-x86_64 = 2.6.18-8.1.8.el5.centos.plus is needed by package kmod-xfs
So it appears like it _does_ need the plus kernel. Or am I doing anything wrong here?
Try
yum install kmod-xfs-0.4-1.2.6.18_8.1.8.el5.x86_64.rpm
instead (with centosplus enabled).
.el5.centos.plus probably looks newer to the dependency resolver in yum.
Cheers,
Ralph
Ralph Angenendt wrote:
Kay Diederichs wrote:
[root@turn29 ESRF]# uname -a Linux turn29.biologie.uni-konstanz.de 2.6.18-8.1.8.el5 #1 SMP Tue Jul 10 06:39:17 EDT 2007 x86_64 x86_64 x86_64 GNU/Linux
--> Processing Dependency: kernel-x86_64 = 2.6.18-8.1.8.el5.centos.plus for package: kmod-xfs --> Finished Dependency Resolution Error: Missing Dependency: kernel-x86_64 = 2.6.18-8.1.8.el5.centos.plus is needed by package kmod-xfs
So it appears like it _does_ need the plus kernel. Or am I doing anything wrong here?
Try
yum install kmod-xfs-0.4-1.2.6.18_8.1.8.el5.x86_64.rpm
instead (with centosplus enabled).
.el5.centos.plus probably looks newer to the dependency resolver in yum.
Cheers,
Ralph
Thanks, Ralph -
yum --enablerepo=centosplus install kmod-xfs-0.4-1.2.6.18_8.1.8.el5
worked (with .x86_64.rpm appended, it didn't).
I also did "yum --enablerepo=centosplus install xfsprogs" and /sbin/mkfs.xfs /dev/md4 which is a RAID0, and am now happily testing XFS.
thanks to the CentOS developers for making it so easy to try things out!
Kay
On 23/07/07, Kay Diederichs kay.diederichs@uni-konstanz.de wrote:
I wanted to try XFS with the normal kernel but I get:
<snip> After all, did you load the module?
On Saturday 21 July 2007, Patrick - South Valley Internet wrote: ...
After googling around (and not finding out how to get XFS enabled in the kernel), people had some concerns about using XFS due to issues and it being about as fast as ext3.
Also people said that I might run into issues with XFS if I run NFS+lvm+xfs+md but I'm not sure if I run lvm and md and if that applies to me.
Just a few random opinions/thoughts on the topic.
* more components (nfs, fs, lvm, ...) uses more stack space * xfs eats stack this is why it's not really good on 32-bit (4K stack) * performance diff vs. ext3 varies not only with work load but also with hardware * ext3 is much more widely used and wont cause you any head aches when a new kernel arrives
/Peter
Am Samstag, 21. Juli 2007 schrieb Patrick - South Valley Internet:
With all this said, I'd like to use XFS, if it indeed is going to be the fastest for the solution I want to implement. If you guys can help me get that installed by telling me what I need - great! If you think XFS isn't going to work as efficiently and fast as I want it to, and there is another filesystem (such as ext3) that will be more stable and just as fast in my setup, I'm all ears.
Just to add some positive feedback: I implemented XFS on an x86_64 box running CentOS around here. The machine is an NFS, Samba and Emailserver (kolab, that means postfix + cyrus imapd). The machine has a Hardware SCSI RAID with 8 10k U320 HDs. So far we had a minor issue with some small undeletable files that could be tracked down to a XFS bug (which is fixed by now). Other than that the box has been running rock stable. We started with CentOS 4.2 or 4.3 and are now at 4.5 via continuous yum updates.
Before the machine went into production I had about two weaks for doing heavy benchmarking and some reinstalls. Using XFS and tuning the parameters of the RAID array gave a massive performance boost. I also tried tuning ext3 but got only about half the throughput than with XFS, so I decided to go XFS.
Of course these results depend on usage pattern, hardware, etc. So do your own benchmarks. I myself asked our heavies nfs users for their homedirs or parts of it and benchmarked by copying these around in parrallel. This was quite enlightening and much more useful than artifical benchmarks.
regards, Andreas Micklei
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Akemi Yagi -
Alvin Chang -
Andreas Micklei -
Johnny Hughes -
Kay Diederichs -
Patrick - South Valley Internet -
Peter Kjellstrom -
Ralph Angenendt