[Openstack] Ceph.

Marcus White roastedseaweed.k at gmail.com
Sat Oct 4 16:45:35 UTC 2014

A bump!


On Tue, Sep 30, 2014 at 2:17 PM, Marcus White
<roastedseaweed.k at gmail.com> wrote:
> Hello,
> Had some basic Ceph questions.
> a. Ceph is strongly consistent and different from usual object, does
> that mean all metadata also, container and account etc is all
> consistent and everything is updated in the path of the client
> operation itself, even for a single site? Is it the same for block and
> file?
> b. If it is strongly consistent, is that the case across sites also?
> How can it be performant across geo sites if that is the case? If its
> choosing consistency over partitioning and availability...For block, I
> read somewhere that it is now eventually consistent(AP vs CP) via DR.
> Gets a bit confusing with all the literature out there. If it is DR,
> isnt that slightly different from the Swift case?
> c. For block, is it CP on a single site and then usual DR to another
> site using snapshotting?
> d. For block, is it just a linux block device or is it SCSI?
> TIA,
> MW

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