On 06/24/2015 05:11 PM, Dzianis Kahanovich wrote: > I plan to migrate cluster from straw to straw2 mapping. Ceph and kernels > is up to date (kernel 4.1.0), so I want to change directly in crush map > srew to straw2 and load changed crush map (by steps - per host and > rack). Are this relative safe and must be remapped runtime? > It really depends on your situation. My big question is though, why do you want to go to straw2? In a situation where all hosts are equal in size straw2 doesn't change anything. It makes a difference where you have a lot of unequally sized hosts. You can test this by fetching you crushmap from the cluster and perform tests on it with 'crushtool'. That will tell you what the differences will be between straw and straw2. -- Wido den Hollander 42on B.V. Ceph trainer and consultant Phone: +31 (0)20 700 9902 Skype: contact42on _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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