On Wed, Feb 28, 2018 at 2:42 PM, Brady Deetz <bdeetz@xxxxxxxxx> wrote: > I'm considering doing one-way rbd mirroring to a DR site. The documentation > states that my link to the DR site should have sufficient throughput to > support replication. > > Our write activity is bursty. As such, we tend to see moments of high > throughput 4-6gbps followed by long bouts of basically no activity. > > 1) how sensitive is rbd mirroring to latency? It's not sensitive at all -- at the worse case, your journals will expand during the burst period and shrink again during the idle period. > 2) how sensitive is rbd mirroring to falling behind on replication and > having to catch up? It's designed to be asynchronous replication w/ consistency so it doesn't matter to rbd-mirror if it's behind. In fact, you can even configure it to always be X hours behind if you want to have a window for avoiding accidents from propagating to the DR site. > > _______________________________________________ > ceph-users mailing list > ceph-users@xxxxxxxxxxxxxx > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > -- Jason _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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