Re: [ceph-users] ssd requirements for wal/db

2019-10-04 Thread Stijn De Weirdt
hi all, maybe to clarify a bit, e.g. https://indico.cern.ch/event/755842/contributions/3243386/attachments/1784159/2904041/2019-jcollet-openlab.pdf clearly shows that the db+wal disks are not saturated, but we are wondering what is really needed/acceptable wrt throughput and latency (eg is a 6gbps

Re: [ceph-users] ssd requirements for wal/db

2019-10-04 Thread Vitaliy Filippov
WAL/DB isn't "read intensive". It's more "write intensive" :) use server SSDs with capacitors to get adequate write performance. Hi all, We are thinking about putting our wal/db of hdds/ on ssds. If we would put the wal&db of 4 HDDS on 1 SSD as recommended, what type of SSD would suffice? We