I'm running small CEPH cluster of 9 OSD nodes, with systems hosted on USB sticks exactly for the same reason - not enough disk slots. Works fine for almost 2 years now.
2018-08-15 1:13 GMT+03:00 Paul Emmerich <[email protected]>: > I've seen the OS running on SATA DOMs and cheap USB sticks. > It works well for some time, and then it just falls apart. > > Paul > > 2018-08-14 9:12 GMT+02:00 Burkhard Linke > <[email protected]>: > > 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.... > > > > > > 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 > > [email protected] > > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > > > > -- > Paul Emmerich > > Looking for help with your Ceph cluster? Contact us at https://croit.io > > croit GmbH > Freseniusstr. 31h > 81247 München > www.croit.io > Tel: +49 89 1896585 90 > _______________________________________________ > ceph-users mailing list > [email protected] > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com >
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