[Lustre-discuss] high CPU usage on MDS
cfaber at gmail.com
Thu Jul 7 07:10:02 PDT 2011
Agreed however more details are still needed.
From: Isaac Huang
Sent: 07/07/2011, 12:31 am
To: Colin Faber
Cc: Ekaterina Popova; lustre-discuss at lists.lustre.org
Subject: Re: [Lustre-discuss] high CPU usage on MDS
I think it's TCP/IP according to the process list. It'd help to find
out where the CPU time was spent, e.g. by oprofile.
On Wed, Jul 06, 2011 at 12:14:54PM -0600, Colin Faber wrote:
> More details are needed here. What type of interconnect are you using?
> What are your clients doing? etc.
> On 07/04/2011 11:08 PM, Ekaterina Popova wrote:
> > Hello!
> > We've got one MDS (Lustre 2.0) with 4 processors (Intel(R) Core(TM)2
> > Quad CPU Q9500 @ 2.83GHz).
> > Our CPU usage is HIGH - 80-100% .
> > With top command we see:
> > PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
> > 2973 root 15 0 0 0 0 R 35.0 0.0 1509:09 socknal_sd02
> > 2972 root 15 0 0 0 0 S 33.5 0.0 1132:13 socknal_sd01
> > 2971 root 15 0 0 0 0 S 19.8 0.0 1129:12 socknal_sd00
> > 2974 root 16 0 0 0 0 R 13.7 0.0 830:47.46 socknal_sd03
> > Is it normal situation? Can we improve performance at mds ? Maybe
> > setting any parameters?
> > (Only about 70 clients mount to Lustre and not all of them work with it.)
> > With regards,
> > Popova Ekaterina
> > _______________________________________________
> > Lustre-discuss mailing list
> > Lustre-discuss at lists.lustre.org
> > http://lists.lustre.org/mailman/listinfo/lustre-discuss
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