Object storage multi-site is very specific to using object storage. It uses the RGW API's to sync s3 uploads between each site. For CephFS you might be able to do a sync of the rados pools, but I don't think that's actually a thing yet. RBD mirror is also a layer on top of things to sync between sites. Basically I think you need to do something on top of the Filesystem as opposed to within Ceph to sync it between sites.
On Wed, May 16, 2018 at 9:51 AM Up Safe <upandsafe@xxxxxxxxx> wrote:
But this is not the question here.The question is whether I can configure multi site for CephFS.Will I be able to do so by following the guide to set up the multi site for object storage?Thanks_______________________________________________On Wed, May 16, 2018, 16:45 John Hearns <hearnsj@xxxxxxxxxxxxxx> wrote:The answer given at the seminar yesterday was that a practical limit was around 60km.I don't think 100km is that much longer. I defer to the experts here._______________________________________________On 16 May 2018 at 15:24, Up Safe <upandsafe@xxxxxxxxx> wrote:Hi,About a 100 km.I have a 2-4ms latency between them.LeonOn Wed, May 16, 2018, 16:13 John Hearns <hearnsj@xxxxxxxxxxxxxx> wrote:Leon,I was at a Lenovo/SuSE seminar yesterday and asked a similar question regarding separated sites.How far apart are these two geographical locations? It does matter._______________________________________________On 16 May 2018 at 15:07, Up Safe <upandsafe@xxxxxxxxx> wrote:LeonThanks,Or am I totally off here?Following this logic - it should be possible, right?Also, if I understand correctly - cephfs is just a component on top of the object storage.Is this possible?I.e. I need to have 2 synced file storages at 2 geographical locations.What I need is cephfs.But the only guides I've found on the net were about building it with object storage or rbd.Hi,I'm trying to build a multi site setup.
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