Den tors 9 maj 2019 kl 16:17 skrev Marc Roos <m.r...@f1-outsourcing.eu>:
> > > Fancy fast WAL/DB/Journals probably help a lot here, since they do > affect the "iops" > > you experience from your spin-drive OSDs. > > What difference can be expected if you have a 100 iops hdd and you start > using > wal/db/journals on ssd? What would this 100 iops increase to > (estimating)? > > I don't know, there is a factor of reading objects which won't get lots of perf from WAL/DB/Journals at all, only the destination writes, and also the relative sizes of the WAL/Journals are relevant since they need to be large enough to allow the drive to flush out data (albeit in a nicer order with larger IOs presumably) or you will just have nice IOPS for a while and then fall back to spin-drive speeds as the WAL/Journal gets filled and need to wait for the drives anyhow. -- May the most significant bit of your life be positive.
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