[ceph-users] Cephfs snapshot work

Dan van der Ster dan at vanderster.com
Tue Nov 7 07:28:12 PST 2017


On Tue, Nov 7, 2017 at 4:15 PM, John Spray <jspray at redhat.com> wrote:
> On Tue, Nov 7, 2017 at 3:01 PM, Dan van der Ster <dan at vanderster.com> wrote:
>> On Tue, Nov 7, 2017 at 12:57 PM, John Spray <jspray at redhat.com> wrote:
>>> On Sun, Nov 5, 2017 at 4:19 PM, Brady Deetz <bdeetz at gmail.com> wrote:
>>>> My organization has a production  cluster primarily used for cephfs upgraded
>>>> from jewel to luminous. We would very much like to have snapshots on that
>>>> filesystem, but understand that there are risks.
>>>>
>>>> What kind of work could cephfs admins do to help the devs stabilize this
>>>> feature?
>>>
>>> If you have a disposable test system, then you could install the
>>> latest master branch of Ceph (which has a stream of snapshot fixes in
>>> it) and run a replica of your intended workload.  If you can find
>>> snapshot bugs (especially crashes) on master then they will certainly
>>> attract interest.
>>
>> Hi John. Are those fixes in master expected to make snapshots stable
>> with rados namespaces (a la Manila) ?
>
> Was there a specific bug with snapshots+namespaces?  I may be having a
> failure of memory or have not been paying enough attention :-)
>

I might be misremembering, but I recall a mail from Greg? a few months
ago saying that snapshots would surely not work with multiple
namespaces.
Can't find the mail, though....

-- dan


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