We have a cluster with two OSS servers and one MDT server with lustre 1.6.7 and clients with lustre 1.6.6. We are going to upgrade Lustre to solve some bugs like bug 18695 and 20008, but we hesitate to upgrade to lustre 1.6.7.2 or lustre 1.8.1. What''s your recomendation? Lustre 1.8.1 can be running on production correctly? ( we can''t stop the servers after the upgrade because the cluster has a lot of process running all time) or is more safety upgrade to 1.6.7.2? Clients with Lustre 1.6.6 can work correctly with a MDS and OSSs with Lustre 1.8.1? thanks!! -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.lustre.org/pipermail/lustre-discuss/attachments/20090819/d91301b1/attachment.html
On Wed, 2009-08-19 at 11:59 +0200, Patricia Santos Marco wrote:> We have a cluster with two OSS servers and one MDT server with lustre > 1.6.7 and clients with lustre 1.6.6. We are going to upgrade Lustre to > solve some bugs like bug 18695 and 20008, but we hesitate to upgrade > to lustre 1.6.7.2 or lustre 1.8.1. What''s your recomendation?Well, we generally, always suggest people upgrade to the latest stable versions. Of course, both 1.8.1 and 1.6.7.2 fit that category, but 1.6 is in maintenance mode and will not get any new features or non-critical bug fixes whereas the 1.8 release track will get some feature enhancements, and all ongoing bug fixes.> Lustre 1.8.1 can be running on production correctly?Absolutely.> Clients with Lustre 1.6.6 can work correctly with a MDS and OSSs with > Lustre 1.8.1? thanks!!I don''t know that we have tested 1.6.6 clients with 1.8.1 specifically but I don''t think there are any known reasons that would be a problem. b. -------------- next part -------------- A non-text attachment was scrubbed... Name: not available Type: application/pgp-signature Size: 197 bytes Desc: This is a digitally signed message part Url : http://lists.lustre.org/pipermail/lustre-discuss/attachments/20090819/80694c19/attachment-0004.bin
Thanks for the quick reply, Then, the best choose is upgrade to 1.8.1. And, another question. The I/O tools and scripts can not run in production because the write tests are destrutive, so, Are there some test ( not destructive) to prove the best number of threads in the OSSs? 2009/8/19 Brian J. Murrell <Brian.Murrell at sun.com>> On Wed, 2009-08-19 at 11:59 +0200, Patricia Santos Marco wrote: > > We have a cluster with two OSS servers and one MDT server with lustre > > 1.6.7 and clients with lustre 1.6.6. We are going to upgrade Lustre to > > solve some bugs like bug 18695 and 20008, but we hesitate to upgrade > > to lustre 1.6.7.2 or lustre 1.8.1. What''s your recomendation? > > Well, we generally, always suggest people upgrade to the latest stable > versions. Of course, both 1.8.1 and 1.6.7.2 fit that category, but 1.6 > is in maintenance mode and will not get any new features or non-critical > bug fixes whereas the 1.8 release track will get some feature > enhancements, and all ongoing bug fixes. > > > Lustre 1.8.1 can be running on production correctly? > > Absolutely. > > > Clients with Lustre 1.6.6 can work correctly with a MDS and OSSs with > > Lustre 1.8.1? thanks!! > > I don''t know that we have tested 1.6.6 clients with 1.8.1 specifically > but I don''t think there are any known reasons that would be a problem. > > b. > > > _______________________________________________ > Lustre-discuss mailing list > Lustre-discuss at lists.lustre.org > http://lists.lustre.org/mailman/listinfo/lustre-discuss > >-- (\__/) ( O.o) ( > <) Este es conejo. Copia a conejo en tu firma y ayudalo en sus planes de dominaci?n mundial. -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.lustre.org/pipermail/lustre-discuss/attachments/20090819/99eb310d/attachment-0001.html
On Wed, 2009-08-19 at 17:41 +0200, Patricia Santos Marco wrote:> And, another question. The I/O tools and scripts can not run in > production because the write tests are destrutive, so, Are there some > test ( not destructive) to prove the best number of threads in the > OSSs?The obdfilter-survey, which is what you want for tuning OST threads, is in fact designed to be able to run on production OSTs. That said, I *cannot* caution you enough that unfortunately we don''t find the time to test that with any rigour or frequency. Tread very cautiously. b. -------------- next part -------------- A non-text attachment was scrubbed... Name: not available Type: application/pgp-signature Size: 197 bytes Desc: This is a digitally signed message part Url : http://lists.lustre.org/pipermail/lustre-discuss/attachments/20090819/77a8dd26/attachment.bin
Thanks to all, you''re very kind!! 2009/8/19 Brian J. Murrell <Brian.Murrell at sun.com>> On Wed, 2009-08-19 at 17:41 +0200, Patricia Santos Marco wrote: > > And, another question. The I/O tools and scripts can not run in > > production because the write tests are destrutive, so, Are there some > > test ( not destructive) to prove the best number of threads in the > > OSSs? > > The obdfilter-survey, which is what you want for tuning OST threads, is > in fact designed to be able to run on production OSTs. That said, I > *cannot* caution you enough that unfortunately we don''t find the time to > test that with any rigour or frequency. Tread very cautiously. > > b. > > > _______________________________________________ > Lustre-discuss mailing list > Lustre-discuss at lists.lustre.org > http://lists.lustre.org/mailman/listinfo/lustre-discuss > >-- (\__/) ( O.o) ( > <) Este es conejo. Copia a conejo en tu firma y ayudalo en sus planes de dominaci?n mundial. -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.lustre.org/pipermail/lustre-discuss/attachments/20090819/fddac711/attachment.html
On Aug 19, 2009 17:41 +0200, Patricia Santos Marco wrote:> Thanks for the quick reply, Then, the best choose is upgrade to 1.8.1. And, > another question. The I/O tools and scripts can not run in production > because the write tests are destrutive, so, Are there some test ( not > destructive) to prove the best number of threads in the OSSs?The best number of IO threads is mostly a function of your disk configuration and CPUs/RAM. Since none of these are changing with the upgrade to 1.8.1, it is probably OK to keep the same values as with 1.6. Cheers, Andreas -- Andreas Dilger Sr. Staff Engineer, Lustre Group Sun Microsystems of Canada, Inc.