Agreed Multi-MDS is a nice to have but not required for full production use.
TBH stability and recovery will win any IT person dealing with filesystems.

On Tue, Nov 4, 2014 at 7:33 AM, Mariusz Gronczewski
<mariusz.gronczew...@efigence.com> wrote:
> On Tue, 4 Nov 2014 10:36:07 +1100, Blair Bethwaite
> <blair.bethwa...@gmail.com> wrote:
>
>>
>> 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.
>>
>
> Those are related; if small file performance will be enough for one
> MDS to handle high load with a lot of small files (typical case of
> webserver), having multiple acive MDS will be less of a priority;
>
> And if someone currently have OSD on bunch of relatively weak nodes,
> again, having active-active setup with MDS will be more interesting to
> him than someone that can just buy new fast machine for it.
>
>
> --
> Mariusz Gronczewski, Administrator
>
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>
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