On Thu, Aug 4, 2016 at 8:57 PM, Goncalo Borges <goncalo.borges@xxxxxxxxxxxxx> wrote: > Dear cephers... > > I am looking for some advice on migrating from legacy tunables to Jewel > tunables. > > What would be the best strategy? > > 1) A step by step approach? > - starting with the transition from bobtail to firefly (and, in this > particular step, by starting to set setting chooseleaf_vary_r=5 and then > decrease it slowly to 1?) > - then from firefly to hammer > - then from hammer to jewel > > 2) or going directly to jewel tunables? > > Any advise on how to minimize the data movement? If you're switching tunables, there's going to be a ton of movement and you need to prepare for it. But unlike with reweighting, there isn't really a way to do it incrementally. I don't know if we have experimental evidence but stepping through them is very unlikely to help; I think you just want to pick the least bad time for a bunch of migration and enable jewel tunables directly. -Greg _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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