[pve-devel] ceph firefly in pve repos

[Dietmar Maurer]

> Yes you can also verify this via fio.
> 
> fio --filename=$DISK --direct=1 --rw=write --bs=4M --numjobs=2 --
> group_reporting --invalidate=0 --name=abc
> 
> Just run this in an endless loop for several days (min 24h). Good SSDs can keep
> up 240MB/s or up to 360MB/s.
> 
> The crucial ones go down to 80MB/s or even 40MB/s with massive latencies.

Thanks for the benchmark. This writes about 2TB per OSD/day:

80MB/s*3*60*60*24 /12= 1,7TB

The TBW for Crucial MX100 is 75TB, so I should not run that test too long ;-)

Honestly, we want to find a good setup for a small enterprise environment. So
It must be cheap, and there is not really much write traffic...