[DRBD-user] DRBD over 10GE, limited throughput

Steve Thompson smt at vgersoft.com
Fri Apr 11 12:30:13 CEST 2014

Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.

On Fri, 11 Apr 2014, Ben RUBSON wrote:

> Replication link is a a 10 Ge link, throughput with iperf (6 threads or
> more) gives 7.7 Gb/s (918 MB/s) bidirectional.
> Could be tuned, but well, enough to sustain my RAID array at 680 MB/s.
> Latency of 10.8 ms between the 2 servers.
> MTU 9012.

Something that strikes me is your latency and throughput: assuming it is 
not a typo, that latency is remarkably high. Between two of my 10GbE 
servers, I see an average latency of 0.07ms (from ping) and an iperf 
throughput of 9.8 Gb/s with MTU=9000 and 1 thread.


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