Il 02/09/2013 12:16, Benoît Canet ha scritto: >> If op_size is non-zero, iops limits are merely a fixed proportion of bps >> > limits, which means the lower set of the two is applied and the higher >> > skipped. >> > I understand the amazon uses op_size like accounting for big IO requests, >> > but >> > we don't do it condionally on io size or anything here, so that once user >> > sets >> > op_size, it simply kicks either bps_{,rd,wr} or iops_{,rd,wr} out the >> > game, is >> > that true? > It will combine with iops_{,rd,wr}.
I think what Fam asked is this: what is the difference between bps=524288 and iops=1/op_size=524288? And I think the answer should be that bs=524288 will allow many requests up to 524288 bytes, while with iops all requests should be rounded up to the op_size. However, I think this is not what the code is doing right now, isn't it? Paolo