Re: [ceph-users] SSD only pool without journal
Le 17/12/2015 16:47, Misa a écrit : Hello everyone, does it make sense to create SSD only pool from OSDs without journal? From my point of view, the SSDs are so fast that OSD journal on the SSD will not make much of a difference. Cheers Misa ___ ceph-users mailing list ceph-users@lists.ceph.com http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com Actually, you can't, as the OSD journal is an implementation detail of Ceph's architecture. It's not there only for performance benefits (i.e. writes are stored sequentially before acknowledgement), but also for integrity purposes, like in journalled filesystems. ___ ceph-users mailing list ceph-users@lists.ceph.com http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
Re: [ceph-users] SSD only pool without journal
Hi, Le 17/12/2015 16:47, Misa a écrit : > Hello everyone, > > does it make sense to create SSD only pool from OSDs without journal? No, because AFAIK you can't have OSDs without journals yet. IIRC there is work done for alternate stores where you wouldn't need journals anymore but it's not yet production ready. Best regards, Lionel ___ ceph-users mailing list ceph-users@lists.ceph.com http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
[ceph-users] SSD only pool without journal
Hello everyone, does it make sense to create SSD only pool from OSDs without journal? From my point of view, the SSDs are so fast that OSD journal on the SSD will not make much of a difference. Cheers Misa ___ ceph-users mailing list ceph-users@lists.ceph.com http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
