On Tue, Aug 27, 2019 at 12:26 PM Wido den Hollander <wido@xxxxxxxx> wrote: > > > > > Op 27 aug. 2019 om 11:38 heeft Max Krasilnikov <pseudo@xxxxxxxxxxxxx> het volgende geschreven: > > > > Hello! > > > > Sat, Aug 24, 2019 at 10:47:55PM +0200, wido wrote: > > > >>> Op 24 aug. 2019 om 16:36 heeft Darren Soothill <darren.soothill@xxxxxxxx> het volgende geschreven: > >>> > >>> So can you do it. > >>> > >>> Yes you can. > >>> > >>> Should you do it is the bigger question. > >>> > >>> So my first question would be what type of drives are you using? Enterprise class drives with a low failure rate? > >>> > >> > >> Doesn’t matter. From my experience: With 2x replication you will loose data at some point. > >> > >> As a consultant I have just seen too many cases of data loss with 2x. > >> > >> Please, don’t do it. > > > > I'd like to ask: do the new features like checksumming fix this problem? > > No, they don’t. > > Imagine you take a machine down for maintenance and while that machine is down you loose a disk. > > You lost data. Although you can bring back the other machine you are still missing transactions. > > This is not fictional, this happens. 100% agree, this happens *all the time* with min_size 1. If you really care about your data then 2/1 just doesn't cut it. Paul > > Same as that during the backfill of a disk you just lost the disk with the remaining copy dies under the load of the backfills. > > I have seen this happen too many times in the last years. > > Don’t try to cut corners. > > Wido > > > > _______________________________________________ > > ceph-users mailing list -- ceph-users@xxxxxxx > > To unsubscribe send an email to ceph-users-leave@xxxxxxx > _______________________________________________ > ceph-users mailing list -- ceph-users@xxxxxxx > To unsubscribe send an email to ceph-users-leave@xxxxxxx _______________________________________________ ceph-users mailing list -- ceph-users@xxxxxxx To unsubscribe send an email to ceph-users-leave@xxxxxxx
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