Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
On Tue, Oct 20, 2015 at 08:52:27PM +0200, Joeri Casteels wrote: > > Throughput is concurrency times request size by request completion latency. > > > > dd has no concurrency, in the given example, request size is 1M, > > if you get 450 MB/s, your latency apparently is in the order of 2.3 ms. > > > > If you want more throughput, > > you need to decrease latency, or increase concurrency. > > Any suggestions on how to improve that then? Increase concurrency? Use something that has concurrency (as I said, dd has not; fio would have) Or use more than one dd, concurrently ;-) Decrease latency? Check if it's your disk or network or both, and if possible, make it complete stuff faster (without losing it in volatile caches in the event of a hard crash). -- : Lars Ellenberg : http://www.LINBIT.com | Your Way to High Availability : DRBD, Linux-HA and Pacemaker support and consulting DRBD® and LINBIT® are registered trademarks of LINBIT, Austria. __ please don't Cc me, but send to list -- I'm subscribed