[pve-devel] ceph firefly in pve repos

[Stefan Priebe - Profihost AG]

Am 09.09.2014 um 11:09 schrieb 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 ;-)

Yeah but they still do around 500-600TB - i already have some with >
400TB and still a lot of free cells.

> 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...

What is cheap? How much € / GB?

Stefan