On Mon, Nov 9, 2015 at 8:16 PM, Wido den Hollander <w...@42on.com> wrote:
> 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. > Yes i followed your update on twitter :) > > > 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. > Thanks a lot for this pointer, i didn't knew this. So restarting KVM / QEMU process effect running VMs ? ( some downtime ) > > > 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 > Thank You so much for your time in replying to my queries :) > > > 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 >
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