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<tt>On 1/4/2011 2:46 AM, Sean McCreadie wrote:</tt>
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<p class="MsoNormal"><tt><o:p></o:p></tt><tt>I have tested write
performance using fio and right now the best I can get is
write throughput and IOPS that are about 50-75% as good as
with drbd replication disabled. <o:p></o:p></tt><tt><br>
</tt></p>
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<tt><br>
Were you able to get closer to the throughput in non-replicated
configuration when using protocol A instead of C? Using very much
the same params as in your configuration, I see that protocol A
buys me better latency but not any further bandwidth. <br>
<br>
I'm on 500 MB/s for replicating one drbd lun, 1GB/s for two and
the same for three. My underline interconnect is Infiniband/DDR
whose bandwidth is 1900MB/s. These disks can yield 1600 MBs for
drbd read test or write test when the connection is off. So I'm
also hitting some unknown (yet, to me) bottleneck...<br>
<br>
Or.<br>
</tt>
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