My understanding is that all reads are copied to the cache pool. This would indicate that cache will be evicted. I don't know to what extent this will affect the hot cache because we have not used a cache pool yet. I'm currently looking into bcache fronting the disks to provide caching there. Robert LeBlanc On Fri, Aug 22, 2014 at 12:41 PM, Andrei Mikhailovsky <andrei at arhont.com> wrote: > Hello guys, > > I am planning to perform regular rbd pool off-site backup with rbd export > and export-diff. I've got a small ceph firefly cluster with an active > writeback cache pool made of couple of osds. I've got the following > question which I hope the ceph community could answer: > > Will this rbd export or import operations affect the active hot data in > the cache pool, thus evicting from the cache pool the real hot data used by > the clients. Or does the process of rbd export/import effect only the osds > and does not touch the cache pool? > > Many thanks > > Andrei > > _______________________________________________ > ceph-users mailing list > ceph-users at lists.ceph.com > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.ceph.com/pipermail/ceph-users-ceph.com/attachments/20140822/aa7630a4/attachment.htm>
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