On 08/14/2018 09:12 AM, Burkhard Linke wrote: > Hi, > > > AFAIk SD cards (and SATA DOMs) do not have any kind of wear-leveling > support. Even if the crappy write endurance of these storage systems > would be enough to operate a server for several years on average, you > will always have some hot spots with higher than usual write activity. > This is the case for filesystem journals (xfs, ext4, almost all modern > filesystems). Been there, done that, had two storage systems failing due > to SD wear.... > I've been running OS on the SuperMicro 64 and 128GB SATA-DOMs for a while now and work fine. I disable Ceph's OSD logging though for performance reasons, but it also saves writes. They work just fine. Wido > > The only sane setup for SD cards amd DOMs are flash aware filesystems > like f2fs. Unfortunately most linux distributions do not support these > in their standard installers. > > > Short answer: no, do not use SD cards. > > > Regards, > > Burkhard > > > _______________________________________________ > 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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