Re: rbd image mount on multiple clients

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Hello Dan,


please read here (i've just read it myself a few days ago):
http://lists.ceph.com/pipermail/ceph-users-ceph.com/2013-May/021351.html

Long story short: yes, you can mount it, but to be able to do
reads/writes one has to use cluster aware filesystem on top of a
block device.

That said, would it be perfectly safe to mount a protected snapshot
clone on multiple clients?

Thanks and kind regards,
Ivan




On Mon, Dec 21, 2015 at 1:28 PM, Wade Holler <wade.holler@xxxxxxxxx> wrote:
> Hi Dan ,
>
> When we say "mount" we are usually referring to a file system. Mounting a
> non shared filesystem on multiple hosts concurrently will certainly break
> things since each non shared filesystem host thinks it has exclusive access.
> Of course this is not true if a shared / clustered filesystem is deployed.
>
> If what you mean is "map" a RBD device to multiple hosts concurrently then
> of course this by itself is fine. It's just a block device.
>
> However it's what you do above the block layer that matters.
>
> Hope this helps.
>
> Best Regards
> Wade
>
> On Mon, Dec 21, 2015 at 5:41 AM Dan Nica <dan.nica@xxxxxxxxxxxxxxxxxxxx>
> wrote:
>>
>> Hi,
>>
>>
>>
>> Is it possible/safe to mount a rbd image and use it on multiple clients
>> will this break anything ?
>>
>>
>>
>> Thanks,
>>
>> Dan
>>
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>
>
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