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
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