similar to: nfs (or tcp or scheduler) changes between centos 5 and 6?

On Thu, Apr 30, 2015 at 02:24:27PM +0200, Peter van Hooft wrote: > > 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: > >

m.roth at 5-cent.us wrote: > Matt Garman wrote: > >>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. > > <snip> > *IF* I understand you, I've got one question:

Matt Garman wrote: > 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,

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

James Pearson wrote: > m.roth at 5-cent.us wrote: >> Matt Garman wrote: >> >>>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. >> >> <snip>

--On Wednesday, April 29, 2015 08:35:29 AM -0500 Matt Garman <matthew.garman at gmail.com> wrote: > All indications are that CentOS 6 seems to be much more "aggressive" > in how it does NFS reads. And likewise, CentOS 5 was very "polite", > to the point that it basically got starved out by the introduction of > the 6.5 boxes. Some things come to mind as

Hi, I''m doing some test on a network 10 gb nics and xen with version 3.1 i''m measuring 2.5 gb/sec from domU to an external physical machine with iperf. switching to 3.2 has reduced the measured performance to 40-50 Mb/sec. did anything change in the network interface? can someone help me? thanks _______________________________________________ Xen-users mailing list

Hi all, I have a rhel 5.1 xen server with two rhel 3 ES hvm guests installed. Both rhel3 guests use an internal xen bridge (xenbr1) which it isn''t binded to any physical interface host. On this bridge throughput it is very very poor, only 2.5 Mbs. How can I increase this throughput??? Many thanks. -- CL Martinez carlopmart {at} gmail {d0t} com

https://bugzilla.samba.org/show_bug.cgi?id=8512 Summary: rsync -a slower than cp -a Product: rsync Version: 3.1.0 Platform: All OS/Version: All Status: NEW Severity: normal Priority: P5 Component: core AssignedTo: wayned at samba.org ReportedBy: linux.news at bucksch.org QAContact:

Hi list This happened when running an iozone test over ceph, it was doing lots of random reads. I have no idea how to properly interpret this, I should find it out. Let me know if you need something else. Thanks! [69003.803272] ------------[ cut here ]------------ [69003.807987] kernel BUG at fs/btrfs/inode.c:6230! [69003.807987] invalid opcode: 0000 [#1] SMP [69003.807987] last sysfs file:

I have a beefy machine (Intel dual-quad core, 16GB memory 2 x GigE) I have loaded RHEL5.1-xen on the hardware and have created two logical systems: 4 cpus, 7.5 GB memory 1 x Gige Following RHEL guidelines, I have it set up so that eth0->xenbr0 and eth1->xenbr1 Each of the two RHEL5.1 guests uses one of the interfaces and this is verified at the switch by seeing the unique MAC addresses.

Hi All, I am looking for advice on how to cure a constantly-crashing NFS server which crashes every few hours, or at least, every few days. The kernel log file (below) points toward NFS as a likely cause. The system disk is a 3ware 8000 series RAID1 mirror. The data disk is using a 3Ware 9000 controller to produce two RAID1 devices; these are then striped (RAID0) in software to form a RAID 10

Anyone have experience with any? I've been having a real hard time finding info on any cards that actually support this under linux. (most of the cards work but I don't see drivers that actually offload the TCP stack) I have seen some comments where kernel developers don't like the idea as well. I'm running CentOS 4.6 64-bit on a dual proc quad core system with 8GB memory. I

Hi all, i've installed AMP and Asterisk following the INSTALL file and i have a problem with the TDM04B with 4 FXO: [root@srvoip ~]# ztcfg -vv Zaptel Configuration ====================== Channel map: Channel 01: FXO Kewlstart (Default) (Slaves: 01) Channel 02: FXO Kewlstart (Default) (Slaves: 02) Channel 03: FXO Kewlstart (Default) (Slaves: 03) Channel 04: FXO Kewlstart (Default)

I have tried to replace these lines from ipchains to work with shorewall. # /NFS requires 111/tcp (sunrpc/portmapper) and *all* UDP ports./ # ipchains -A input -p tcp -s $SUBNET -i eth0 -d 0/0 111 -j ACCEPT ipchains -A input -p udp -s $SUBNET -i eth0 -d 0/0 -j ACCEPT # /These ports are required by bootp, tftpd, and PXE./ # /There are also a handful of udp ports that need to/ # /be open,

Let's see I've got a network about 10 PCs running XP and 1 running Linux. I had setup Samba and it was running like a charm. XP pcs could access linux box through network neighborhood and access 2 shared dir and edit/change files. Really not sure what has gone wrong. I am using Samba 2.2.8a I run both smbd and nmbd as daemons. When I run ps -aux they show up. root 1553 0.0

There are a couple of xen updates in the 4.9.66 and 4.9.68 kernels: https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.66 https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.68 Let me build a newer Dom0 kernel and see if that helps. Thanks, Johnny Hughes On 12/11/2017 06:52 PM, Adi Pircalabu wrote: > Has anyone seen this recently? I couldn't replicate it on: > -

Hi, We are running a server as an nfs head connect to a clariion, every couple of days we have our box fall over with the following msg in syslog. Has anyone had this happen to there boxen? rhel4 u4 May 8 12:23:52 ruchba kernel: Assertion failure in log_do_checkpoint() at fs/jbd/checkpoint.c:363: "drop_count != 0 || cleanup_ret != 0" May 8 12:23:52 ruchba kernel: ------------[ cut

I have a machine with a recent install of centos (2.6.32-220.2.1.el6.x86_64 kernel). It crashed 3 times this week, and sent emails like the one below complaining about kernel taint. I've gone back to a previous kernel to see if that helps, but otherwise I don't know how to investigate this. What should I do? Here's stuff from the log and one of the emails:

I followed the Wiki instructions to get zaptel to work on Fedora core 2. It looked like everything went perfect including the loading of ztdummy. However, I am having meetme and MOH problems synonymous with ztdummy not loading. Take a look at my lsmod...Any ideas? (I am running stable Asterisk on a DL360 - Dual processor) Module Size Used by snd_pcm_oss 46201 0