Hello, we clearly understood that. But in ceph we have the concept of "OSD Journal on very fast different disk". I just asked what in theory should be the advantage of caching on bcache/NVME vs. Journal/NVME. I would not expect any performance advantage for bcache (if the Journal is reasonably sized). I might be totally wrong, though. If you just do it, because you don't want to re-create (or modify) the OSDs, it's not worth the effort IMHO. rgds, derjohn On 02.03.21 10:48, Norman.Kern wrote: > On 2021/3/2 上午5:09, Andreas John wrote: >> Hallo, >> >> do you expect that to be better (faster), than having the OSD's Journal >> on a different disk (ssd, nvme) ? > No, I created the OSD storage devices using bcache devices. >> >> rgds, >> >> derjohn >> >> >> On 01.03.21 05:37, Norman.Kern wrote: >>> Hi, guys >>> >>> I am testing ceph on bcache devices, I found the performance is not good as expected. Does anyone have any best practices for it? Thanks. >>> _______________________________________________ >>> 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 -- Andreas John net-lab GmbH | Frankfurter Str. 99 | 63067 Offenbach Geschaeftsfuehrer: Andreas John | AG Offenbach, HRB40832 Tel: +49 69 8570033-1 | Fax: -2 | http://www.net-lab.net Facebook: https://www.facebook.com/netlabdotnet Twitter: https://twitter.com/netlabdotnet _______________________________________________ ceph-users mailing list -- ceph-users@xxxxxxx To unsubscribe send an email to ceph-users-leave@xxxxxxx
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