Re: [cephfs] About feature 'snapshot'

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On Thu, Mar 17, 2016 at 1:41 PM, Gregory Farnum <gfarnum@xxxxxxxxxx> wrote:
> On Thu, Mar 17, 2016 at 3:49 AM, John Spray <jspray@xxxxxxxxxx> wrote:
>> Snapshots are disabled by default:
>> http://docs.ceph.com/docs/hammer/cephfs/early-adopters/#most-stable-configuration
>
> Which makes me wonder if we ought to be hiding the .snaps directory
> entirely in that case. I haven't previously thought about that, but it
> *is* a bit weird.

Hmm, we could use the ever_allowed_snaps field to hide .snap.

However, we would still want to prevent people creating a directory
with that name, because if they ever enabled snapshots, we wouldn't
have a way of resolving that.  So it would be weird to omit .snap from
the directory listing, but then give an error if someone tries to
create a folder with that name.  Perhaps showing the folder (even if
snaps are disabled) is the lesser evil.

John

> -Greg
>
>>
>> John
>>
>> On Thu, Mar 17, 2016 at 10:02 AM, 施柏安 <desmond.s@xxxxxxxxxxxxxx> wrote:
>>> Hi all,
>>> I encounter a trouble about cephfs sanpshot. It seems that the folder
>>> '.snap' is exist.
>>> But I use 'll -a' can't let it show up. And I enter that folder and create
>>> folder in it, it showed something wrong to use snapshot.
>>>
>>> Please check : http://imgur.com/elZhQvD
>>>
>>>
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