[lustre-discuss] Lustre over 10 Gb Ethernet with and without RDMA

INKozin i.n.kozin at googlemail.com
Fri Jun 19 02:42:37 PDT 2015

My question is about performance advantages of Lustre RDMA over 10 Gb
Ethernet. When using 10 Gb Ethernet to build Lustre, is it worth paying the
premium for iWARP? I understand that iWARP essentially reduces latency but
less sure of its specific implications for storage. Would it improve
performance on small files? Any pointers to representative benchmarks will
be very appreciated.

Celsio has released a white paper in which they compare Lustre RDMA over 40
Gb Ethernet and FDR IB
where they claim comparable performance of both.
How much worse the throughput on small block sizes would be without iWARP?

Thank you
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