Re: cephfs survey results

[Wido den Hollander <wido-fspyXLx8qC4@public.gmane.org>]

On 11/04/2014 10:02 AM, Sage Weil wrote:
> On Tue, 4 Nov 2014, Blair Bethwaite wrote:
>> On 4 November 2014 01:50, Sage Weil <sage-BnTBU8nroG7k1uMJSBkQmQ@public.gmane.org> wrote:
>>> In the Ceph session at the OpenStack summit someone asked what the CephFS
>>> survey results looked like.
>>
>> Thanks Sage, that was me!
>>
>>>  Here's the link:
>>>
>>>         https://www.surveymonkey.com/results/SM-L5JV7WXL/
>>>
>>> In short, people want
>>>
>>> fsck
>>> multimds
>>> snapshots
>>> quotas
>>
>> TBH I'm a bit surprised by a couple of these and hope maybe you guys
>> will apply a certain amount of filtering on this...
>>
>> fsck and quotas were there for me, but multimds and snapshots are what
>> I'd consider "icing" features - they're nice to have but not on the
>> critical path to using cephfs instead of e.g. nfs in a production
>> setting. I'd have thought stuff like small file performance and
>> gateway support was much more relevant to uptake and
>> positive/pain-free UX. Interested to hear others rationale here.
> 
> Yeah, I agree, and am taking the results with a grain of salt.  I 
> think the results are heavily influenced by the order they were 
> originally listed (I whish surveymonkey would randomize is for each 
> person or something).
> 
> fsck is a clear #1.  Everybody wants multimds, but I think very few 
> actually need it at this point.  We'll be merging a soft quota patch 
> shortly, and things like performance (adding the inline data support to 
> the kernel client, for instance) will probably compete with getting 
> snapshots working (as part of a larger subvolume infrastructure).  That's 
> my guess at least; for now, we're really focused on fsck and hard 
> usability edges and haven't set priorities beyond that.
> 
> We're definitely interested in hearing feedback on this strategy, and on 
> peoples' experiences with giant so far...
> 

I think the approach is correct. Everybody I talk to wants to kick out
their NFS server, but you don't need multi MDS for that. Active/Standby
is just fine.

Wido

> sage
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-- 
Wido den Hollander
42on B.V.
Ceph trainer and consultant

Phone: +31 (0)20 700 9902
Skype: contact42on