Re: Question about big EC pool.

[Mike Almateia <mike.almateia@gmail.com>]

13-Sep-15 01:12, Somnath Roy пишет:
> 12-Sep-15 19:34, Somnath Roy пишет:
>> >I don't think there is any limit from Ceph side..
>> >We are testing with ~768 TB deployment with 4:2 EC on Flash and it is working well so far..
>> >
>> >Thanks & Regards
>> >Somnath
> Thanks for answer!
>
> It's very interesting!
>
> What is hardware you use for your the test cluster?
> [Somnath] Three 256 TB SanDisk's JBOF (IF100) and 2 heads in front of that , so, total of 6 node cluster. FYI, each IF100 can support max 512 TB. Heads are with 128GB  RAM and Xeon 2690 V3 dual socket on each of the server.

What a version of ceph you use?
How cluster working in degraded state? Performance degradation is huge?
I think that e5-2690 didn't enough for that flash cluster.

How you have 6 node if as you say "Three 256 TB SanDisk's JBOF (IF100) 
and 2 heads in front of that", may be I not realized how IF100 working.

> You use only SSD or SSD+NVE?
>
> [Somnath] For now, it is all SSDs.
>
> Journal is located on the same SSD or not?
>
> [Somnath] Yes, journal is on the same SSD.
>
> What a plugin you use?
>
> [Somnath] Cauchy_good jerasure.

You did try the isa plugin?

>
> You catch some bugs or strange things?
>
> [Somnath] So far all is well :-)
>

It's good :)

Thanks for answer!
-- 
Mike, yes.

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