On 11/09/2015 05:27 PM, Vickey Singh wrote: > Hello Ceph Geeks > > Need your comments with my understanding on straw2. > > - Is Straw2 better than straw ?
It is not persé better then straw(1). straw2 distributes data better when not all OSDs are equally sized/weighted. > - Is it straw2 recommended for production usage ? > I'm using it in multiple clusters and it works fine. > I have a production Ceph Firefly cluster , that i am going to upgrade to > Ceph hammer pretty soon. Should i use straw2 for all my ceph pools ? > I would upgrade to Hammer first and make sure that ALL clients are updated. In case you are using KVM/Qemu, you will have to stop those processes first and start them again before they are using the new code. > Also how can i change from straw to straw2. ( should i decompile crush map > and replace all straw with straw2) ? > Yes, that's it. Extract, decompile, replace, compile, inject. $ ceph osd getcrushmap -o crushmap $ crushtool -d crushmap -o crushmap.txt $ <edit crushmap.txt> $ crushtool -c crushmap.txt -o crushmap.new $ ceph osd setcrushmap -i crushmap.new In case stuff goes wrong, inject the original crushmap. Wido > Please suggest > > Thank You in advance. > > - Vickey - > > > > _______________________________________________ > ceph-users mailing list > ceph-users@lists.ceph.com > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > -- Wido den Hollander 42on B.V. Ceph trainer and consultant Phone: +31 (0)20 700 9902 Skype: contact42on _______________________________________________ ceph-users mailing list ceph-users@lists.ceph.com http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
