SW-RAID doesn't help with bit-rot if that's what you're afraid of. If you are afraid bit-rot you need to use a fully checksumming filesystem like ZFS. Ceph doesn't help there either when using replicas - not sure how strong error detection+correction is in EC-type pools. The only thing I can suggest (apart from using ZFS) is getting drives that have a higher BER rating so bit-rot isn't as likely to occur. Jan > On 23 Nov 2015, at 18:09, Jose Tavares <jat@xxxxxxxxxxxx> wrote: > > Hi guys ... > > Is there any advantage in running CEPH over a Linux SW-RAID to avoid data corruption due to disk bad blocks? > > Can we just rely on the scrubbing feature of CEPH? Can we live without an underlying layer that avoids hardware problems to be passed to CEPH? > > I have a setup where I put one OSD per node and I have a 2 disk raid-1 setup. Is it a good option or it would be better if I had 2 OSDs, one in each disk? If I had one OSD per disk, I would have to increase the number os replicas to guarantee enough replicas if one node goes down. > > Thanks a lot. > Jose Tavares > _______________________________________________ > ceph-users mailing list > ceph-users@xxxxxxxxxxxxxx > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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