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I have a dual Xeon 5130 (four total CPUs) server running CentOS 5.7. Approximately every 17 hours, the load on this server slowly creeps up until it hits 20, then slowly goes back down. The most recent example started around 2:00am this morning. Outside of these weird times, the load never exceeds 2.0 (and in fact spends the overwhelming majority of its time at 1.0). So this morning, a few

I?m looking for advice and considerations on how to optimally setup and deploy an NFS-based home directory server. In particular: (1) how to determine hardware requirements, and (2) how to best setup and configure the server. We actually have a system in place, but the performance is pretty bad---the users often experience a fair amount of lag (1--5 seconds) when doing anything on their home

Hi, We have a little over 100 servers, almost all running CentOS 5.7. Virtually all are Dell servers, generally a mix of 1950s, R610s, and R410s. We use NTP and/or PTP to sync their clocks. One phenomenon we've noticed is that (1) on reboot, the clocks are all greatly out of sync, and (2) if the PTP or NTP process is stopped, the clocks start drifting very quickly. If it was isolated to

I can't seem to find the answer to this question via web search... I changed some hardware on a server, and upon powering it back on, got the "/dev/xxx has gone 40 days without being check, check forced" message. Now it's running fsck on a huge (2 TB) ext3 filesystem (5400 RPM drives no less). How can I stop this in-progress check? Ctrl-C doesn't seem to have any effect.

...e2fs against a LVM (albeit formatted with ext4) is not the same as tune2fs against ext4. Could this possibly be a machine where uptime has outlived its usefulness? On Thu, Apr 21, 2016 at 10:02 PM, Chris Murphy <lists at colorremedies.com> wrote: > On Tue, Apr 19, 2016 at 10:51 AM, Matt Garman <matthew.garman at gmail.com> > wrote: > > > ># rpm -qf `which tune2fs` > >e2fsprogs-1.41.12-18.el6.x86_64 > > That's in the CentOS 6.4 repo, I don't see a newer one through 6.7 but > I didn't do a thorough check, just with google site: filter. > &...

On Sun, Jan 17, 2016 at 10:05 AM, Matt Garman <matthew.garman at gmail.com> wrote: > I'm not sure what's going on with your drive. But if it were mine, I'd want > to replace it. If there are issues, that long smart check ought to turn up > something, and in my experience, that's enough for a manufacturer to do a...

...une2fs against ext4. >> >> Could this possibly be a machine where uptime has outlived its >> usefulness? >> >> On Thu, Apr 21, 2016 at 10:02 PM, Chris Murphy <lists at colorremedies.com> >> wrote: >> >>> On Tue, Apr 19, 2016 at 10:51 AM, Matt Garman >>> <matthew.garman at gmail.com> >>> wrote: >>> >>> >>>> # rpm -qf `which tune2fs` >>>> e2fsprogs-1.41.12-18.el6.x86_64 >>> That's in the CentOS 6.4 repo, I don't see a newer one through 6.7 but >>> I didn&...

I have an ext4 filesystem for which I'm trying to use "tune2fs -l". Here is the listing of the filesystem from the "mount" command: # mount | grep share /dev/mapper/VolGroup_Share-LogVol_Share on /share type ext4 (rw,noatime,nodiratime,usrjquota=aquota.user,jqfmt=vfsv0,data=writeback,nobh,barrier=0) When I try to run "tune2fs" on it, I get the following error:

> Message: 4 > Date: Wed, 29 Apr 2015 08:35:29 -0500 > From: Matt Garman <matthew.garman at gmail.com> > To: CentOS mailing list <centos at centos.org> > Subject: [CentOS] nfs (or tcp or scheduler) changes between centos 5 > and 6? > Message-ID: > <CAJvUf-CyTg8ZiGq3OXRLKw7s1K2dGx1gqo_2XwOAXXQty=RHZQ at mail.gmail.com> > Content-Type...

Is anyone on the list using kerberized-nfs on any kind of scale? I've been fighting with this for years. In general, when we have issues with this system, they are random and/or not repeatable. I've had very little luck with community support. I hope I don't offend by saying that! Rather, my belief is that these problems are very niche/esoteric, and so beyond the scope of typical

...this <grin> but is there any way to have rsync not allow itself to be cached, or maybe to force it to use a disk cache instead of physical RAM? Since this jobs runs at night when I'm not using the computer, I don't care about degrading rsync's performance. Thanks, Matt -- Matt Garman, garman@raw-sewage.net ``I ain't never seen no whiskey, the blues made my sloppy drunk!'' -- Sleepy John Estes, ``Leaving Trunk''

I always tell vendors I'm using RHEL, even though we're using CentOS. If you say CentOS, some vendors immediately throw up their hands and say "unsupported" and then won't even give you the time of day. A couple tricks for fooling tools into thinking they are on an actual RHEL system: 1. Modify /etc/redhat-release to say RedHat Enterprise Linux or whatever the actual RHEL

On Tue, Oct 25, 2016 at 12:48 PM, Matt Garman <matthew.garman at gmail.com> wrote: > On Mon, Oct 24, 2016 at 6:09 PM, Larry Martell <larry.martell at gmail.com> wrote: >> The machines are on a local network. I access them with putty from a >> windows machine, but I have to be at the site to do that. > > So that...

I'm probably overlooking something simple, but I can't seem to find a concise changelog for the rhel/centos kernel. I'm on an oldish 6.5 kernel (2.6.32-431), and I want to look at the changes and fixes for every kernel that has been released since, all the way up to the current 6.6 kernel. Anyone have a link to this? Thanks! Matt

On Mon, Oct 24, 2016 at 5:25 PM, Matt Garman <matthew.garman at gmail.com> wrote: > On Mon, Oct 24, 2016 at 2:42 PM, Larry Martell <larry.martell at gmail.com> wrote: >>> At any rate, what I was looking at was seeing if there was any way to >>> simplify this process, and cut NFS out of the picture. If you nee...

We have a "compute cluster" of about 100 machines that do a read-only NFS mount to a big NAS filer (a NetApp FAS6280). The jobs running on these boxes are analysis/simulation jobs that constantly read data off the NAS. We recently upgraded all these machines from CentOS 5.7 to CentOS 6.5. We did a "piecemeal" upgrade, usually upgrading five or so machines at a time, every few

On Thu, Apr 9, 2015 at 8:49 AM, Johnny Hughes <johnny at centos.org> wrote: > rpm -qp --changelog <rpm-name> | less > > NOTE: This works for any kernel RPM in any version of CentOS ... you > can download the latest 6 RPM from here: > > http://mirror.centos.org/centos/6/updates/x86_64/Packages/ > > (currently kernel-2.6.32-504.12.2.el6.x86_64.rpm) > Thank

Il 17/01/2016 18:46, Brandon Vincent ha scritto: > On Sun, Jan 17, 2016 at 10:05 AM, Matt Garman <matthew.garman at gmail.com> wrote: >> I'm not sure what's going on with your drive. But if it were mine, I'd want >> to replace it. If there are issues, that long smart check ought to turn up >> something, and in my experience, that's enough for a manufact...

On Tue, Apr 19, 2016 at 10:51 AM, Matt Garman <matthew.garman at gmail.com> wrote: ># rpm -qf `which tune2fs` >e2fsprogs-1.41.12-18.el6.x86_64 That's in the CentOS 6.4 repo, I don't see a newer one through 6.7 but I didn't do a thorough check, just with google site: filter. > # cat /etc/redhat-release > CentO...

...with ext4) is not the same as > tune2fs against ext4. > > Could this possibly be a machine where uptime has outlived its usefulness? > > On Thu, Apr 21, 2016 at 10:02 PM, Chris Murphy <lists at colorremedies.com> > wrote: > >> On Tue, Apr 19, 2016 at 10:51 AM, Matt Garman <matthew.garman at gmail.com> >> wrote: >> >> >>> # rpm -qf `which tune2fs` >>> e2fsprogs-1.41.12-18.el6.x86_64 >> That's in the CentOS 6.4 repo, I don't see a newer one through 6.7 but >> I didn't do a thorough check, just with goog...