> On Apr 11, 2025, at 10:13, gagan tiwari <gagan.tiw...@mathisys-india.com> > wrote: > > Hi Anthony, > We will be using Samsung SSD 870 QVO 8TB disks on > all OSD servers. I’m a newbie to ceph and I have a 4 node cluster and it doesn’t have a lot of users so downtime is easily scheduled for tinkering. I started with consumer SSDs (SATA/NVMEs) because they were free and lying around. Performance was bad. Then just the NVMEs, still bad. Then enterprise SSDs, still bad (relative to DAS anyway).
Each step on the journey to enterprise SSDs made things faster. The problem with the consumer stuff is the latency. Enterprise SSDs are 0-2ms. Consumer SSDs are 15-300ms. As you can see, the latency difference is significant. So from my experience, I would say ceph is very slow in general compared to DAS. You need all the help you can get. If you want to use the consumer stuff, I would recommend to make a slow tier (2nd pool with a different policy). Or I suppose just expect it to be slow in general. I still have my consumer drives installed, just configured as a 2nd tier which is unused right now because we have an old JBOD for 2nd tier that is much faster. Good luck! _BB _______________________________________________ ceph-users mailing list -- ceph-users@ceph.io To unsubscribe send an email to ceph-users-le...@ceph.io
