Re: [HPDD-discuss] Lustre 2.6.0 vs 2.5.3 on production systems

Hi Patrick, Thank you! LU-1669 is exactly what I want :). Regards,Cuong _____________________________ From: Patrick Farrell <paf(a)cray.com&gt; Sent: Monday, March 16, 2015 4:09 AM Subject: RE: [HPDD-discuss] Lustre 2.6.0 vs 2.5.3 on production systems To: Viet Cuong Nguyen <mrcuongnv(a)gmail.com&gt;, Dilger, Andreas <andreas.dilger(a)intel.com&gt; Cc: <hpdd-discuss(a)lists.01.org&gt; Cuong, Most of the performance differences are covered here (These are changes which went in to 2.6, and are also in 2.7): http://cdn.opensfs.org/wp-content/uploads/2014/04/D1_S6_LustreClientIOPer... There are also some other improvements to specific workloads in 2.7, notably multiple process on a single client: https://jira.hpdd.intel.com/browse/LU-1669 - Patrick From: Viet Cuong Nguyen [mrcuongnv(a)gmail.com] Sent: Sunday, March 15, 2015 9:42 AM To: Dilger, Andreas Cc: Patrick Farrell; hpdd-discuss(a)lists.01.org Subject: Re: [HPDD-discuss] Lustre 2.6.0 vs 2.5.3 on production systems Hi Andreas, Thanks! I will run some benchmark to verify it. Regards, Cuong _____________________________ From: Dilger, Andreas < andreas.dilger(a)intel.com&gt; Sent: Sunday, March 15, 2015 7:11 AM Subject: Re: [HPDD-discuss] Lustre 2.6.0 vs 2.5.3 on production systems To: Nguyen Viet Cuong < mrcuongnv(a)gmail.com&gt; Cc: Patrick Farrell < paf(a)cray.com&gt;, < hpdd-discuss(a)lists.01.org&gt; Yes, these versions are compatible.  You wouldn't be able to use the newer features in 2.7.0, but you will likely see better performance.  Cheers, Andreas On Mar 14, 2015, at 09:12, Nguyen Viet Cuong < mrcuongnv(a)gmail.com&gt; wrote: Hi Farrell, Could we get the performance gain by using 2.7 client with 2.5.3 server? If yes, is there any trade off in compatibility? Regards, Cuong On Sat, Mar 14, 2015 at 12:19 AM, Patrick Farrell <paf(a)cray.com&gt; wrote: Bob, About performance, as well.  In general, 2.6/2.7 client performance is significantly better than 2.5 (server performance is largely the same).  There are certain specific cases with particular hardware configurations and workloads that are worse, but in general, I'd say improved client performance is perhaps the best reason to choose 2.6 over 2.5.3.  (Certainly 2.6 is going to be a bit buggier than 2.5.3, which as the maintenance branch has had a significant amount of work done on it since 2.6 was released.) - Patrick On 03/13/2015 09:28 AM, Bob Ball wrote: Thank you, Peter.  That is helpful information.  We are currently leaning towards 2.6, but if the upgrade path from there to 2.7 is simple, and can work with OST/MDT created under 2.6, then that may be the path that we'll follow.  We need to bring the new system online quite soon. Regards, bob On 3/13/2015 10:20 AM, Jones, Peter A wrote: Hi Bob I know that you are really looking for responses directly from sites running the releases in production but a couple of things that you might be helpful for you to know: 1) The recent OpenSFS survey 10 out of the 89 respondents said that they were using 2.6 in production 2) Lustre 2.7 is expected to be released quite soon and will be more current in kernel version, zfs version and bug fixes. Regards Peter On 3/13/15, 6:49 AM, "Bob Ball" < ball(a)umich.edu&gt; wrote: Hi, We are about to set up a new Lustre system here, and we are trying to decide between using 2.5.3 or 2.6.0 .  Files in our older 2.1.6 system will simply be migrated over, and the old system tossed down the tubes. Is anyone using 2.6.0 in production?  I found this on some 2.6.0 performance data, and it looks rather discouraging. https://jira.hpdd.intel.com/browse/LU-4841?filter=10828 I have also noticed that the 2.5.3 server rpms actually use a slightly newer kernel than the 2.6.0 set.  By and large, we will use zfs underlying the OST. So, I will gladly accept any advice on which way we should turn as we set this up. Thanks, bob ______________________________ _________________ HPDD-discuss mailing list HPDD-discuss(a)lists.01.org https://lists.01.org/mailman/listinfo/hpdd-discuss ______________________________ _________________ HPDD-discuss mailing list HPDD-discuss(a)lists.01.org https://lists.01.org/mailman/listinfo/hpdd-discuss ______________________________ _________________ HPDD-discuss mailing list HPDD-discuss(a)lists.01.org https://lists.01.org/mailman/listinfo/hpdd-discuss -- Nguyen Viet Cuong _______________________________________________ HPDD-discuss mailing list HPDD-discuss(a)lists.01.org https://lists.01.org/mailman/listinfo/hpdd-discuss