Hi Marion, Enabling PFL and relocating file will double space consumption, so safe way is not to enable new features. Among other things, compression may be a good idea to try but remember it will increase OSS CPU utilization.
Regards, Jongwoo Han On Tue, Oct 9, 2018 at 9:00 AM Marion Hakanson <[email protected]> wrote: > Greetings, > > We're upgrading our Lustre servers from CentOS-6 with IEEL-2.3, to > CentOS-7.5 with Lustre community release 2.10.5. The OSTs are all > on the ZFS backend, originally built on ZoL-0.6.5. > > The new 2.10.5 servers come with ZoL-0.7.9, which of course has some > new zpool features available. > > Once we've upgraded, should we enable one or more of the new features > in our existing OST zpools? E.g. large_blocks? And then update the > ZFS recordsize to whatever a newly-created Lustre 2.10.5 OST would use? > > I do realize the new recordize setting wouldn't affect existing files, > but we're also looking at enabling PFL and doing a global "lfs migrate" > operation to re-layout everything for better performance. > > Thoughts? Anyone else been down this road? > > Thanks and regards, > > Marion > > _______________________________________________ > lustre-discuss mailing list > [email protected] > http://lists.lustre.org/listinfo.cgi/lustre-discuss-lustre.org > -- Jongwoo Han +82-505-227-6108
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