Re: Ceph snapshots

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You may find my talk at OpenStack Boston’s Ceph day last year to be useful: https://www.youtube.com/watch?v=rY0OWtllkn8
-Greg
On Wed, Jun 27, 2018 at 9:06 AM Marc Schöchlin <ms@xxxxxxxxxx> wrote:
Hello list,

i currently hold 3 snapshots per rbd image for my virtual systems.

What i miss in the current documentation:

  * details about the implementation of snapshots
      o implementation details
      o which scenarios create high overhead per snapshot
      o what causes the really short performance degration on snapshot
        creation/deletion
      o why do i not see a significant rbd performance degration if
        there a numerous snapshots
      o ....
  * details and recommendations about the overhead of snapshots
      o what performance penalty do i have to expect for a write/read iop
      o what are the edgecases of the implemnetation
      o how many snapshots per image (i.e virtual machine) might be a
        good idea
      o ...

Regards
Marc


Am 27.06.2018 um 15:37 schrieb Brian ::
> Hi John
>
> Have you looked at ceph documentation?
>
> RBD: http://docs.ceph.com/docs/luminous/rbd/rbd-snapshot/
>
> The ceph project documentation is really good for most areas. Have a
> look at what you can find then come back with more specific questions!
>
> Thanks
> Brian
>
>
>
>
> On Wed, Jun 27, 2018 at 2:24 PM, John Molefe <John.Molefe@xxxxxxxxx> wrote:
>> Hi everyone
>>
>> I would like some advice and insight into how ceph snapshots work and how it
>> can be setup.
>>
>> Responses will be much appreciated.
>>
>> Thanks
>> John
>>
>> Vrywaringsklousule / Disclaimer:
>> http://www.nwu.ac.za/it/gov-man/disclaimer.html
>>
>>
>> _______________________________________________
>> ceph-users mailing list
>> ceph-users@xxxxxxxxxxxxxx
>> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
>>
> _______________________________________________
> ceph-users mailing list
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> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com


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