Expanding my tiny ceph setup from 2 OSD's to six, and two extra SSD's for journals (IBM 530 120GB) Yah, I know the 5300's would be much better .... Assuming I use 10GB ber OSD for journal and 5GB spare to improve the SSD lifetime, that leaves 85GB spare per SSD. Is it worthwhile setting up a 2 *85GB OSD Cache Tier (Replica 2)? Usage is for approx 15 Active VM's, used mainly for development and light database work. Maybe its way to small and would be continually shuffling hot data. Also - is writeback dangerous for cache tiering? it seems to be safe to me as the data is being written safely to the cache tier and will be flushed to the backing store on restart after an power failure etc. -- Lindsay
Attachment:
signature.asc
Description: This is a digitally signed message part.
_______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
