Hi, What makes this cluster a non-local cluster? 0'6 and 1 millisecond RTT latency seems too high for all-flash clusters and intense 4K write workloads. The upmap-read or read balancer modes may help with reads but not writes where 1.2ms+ latency will still be observed. Regards, Frédéric. ----- Le 1 Oct 24, à 18:23, Victor Rodriguez vrodriguez@xxxxxxxxxxxxx a écrit : > Hello, > > I'm trying to get the most from a Ceph Reef 3 node clusters, with 6 NVMe > OSD each. Each node is between 0'6 and 1 millisecond RTT. Obviously > performance isn't as good as with local clusters, usually around ~0'2ms. > 4k in Q1D1 I/O write request are the most affected by this, as expected, > with a performance loss of around 70% from an all local cluster with > similar hardware. In general, measurements match the increased latency. > > Are there any guidelines about what to tune or adjust to get the most of > this kind of setups with "high" latencies? > > Thanks in advance! > > Victor > > _______________________________________________ > ceph-users mailing list -- ceph-users@xxxxxxx > To unsubscribe send an email to ceph-users-leave@xxxxxxx _______________________________________________ ceph-users mailing list -- ceph-users@xxxxxxx To unsubscribe send an email to ceph-users-leave@xxxxxxx
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