Agreed however more details are still needed. -cf -----Original message----- From: Isaac Huang Sent: 07/07/2011, 12:31 am To: Colin Faber Cc: Ekaterina Popova; lustre-discuss@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. - Isaac On Wed, Jul 06, 2011 at 12:14:54PM -0600, Colin Faber wrote: > Hi, > > More details are needed here. What type of interconnect are you using? > What are your clients doing? etc. > > -cf > > > 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@lists.lustre.org > > http://lists.lustre.org/mailman/listinfo/lustre-discuss > _______________________________________________ > Lustre-discuss mailing list > Lustre-discuss@lists.lustre.org > http://lists.lustre.org/mailman/listinfo/lustre-discuss ______________________________________________________________________ This email may contain privileged or confidential information, which should only be used for the purpose for which it was sent by Xyratex. No further rights or licenses are granted to use such information. If you are not the intended recipient of this message, please notify the sender by return and delete it. You may not use, copy, disclose or rely on the information contained in it. Internet email is susceptible to data corruption, interception and unauthorised amendment for which Xyratex does not accept liability. While we have taken reasonable precautions to ensure that this email is free of viruses, Xyratex does not accept liability for the presence of any computer viruses in this email, nor for any losses caused as a result of viruses. Xyratex Technology Limited (03134912), Registered in England & Wales, Registered Office, Langstone Road, Havant, Hampshire, PO9 1SA. The Xyratex group of companies also includes, Xyratex Ltd, registered in Bermuda, Xyratex International Inc, registered in California, Xyratex (Malaysia) Sdn Bhd registered in Malaysia, Xyratex Technology (Wuxi) Co Ltd registered in The People's Republic of China and Xyratex Japan Limited registered in Japan. ______________________________________________________________________ _______________________________________________ Lustre-discuss mailing list Lustre-discuss@lists.lustre.org http://lists.lustre.org/mailman/listinfo/lustre-discuss