Re: [Aoetools-discuss] Use of rtt in AOE protocol
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From: Jesse B. <bec...@ma...> - 2009-11-16 13:07:35
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On Mon, Nov 16, 2009 at 03:33:46AM -0500, Simon Kirby wrote: >However, I am seeing a lot of cases (depending on the load) where this >algorithm is being confused by the time it takes for the response to come >back from the target. Since there is network-level ACK in the AOE >protocol, the actual time it takes for a response to come back depends >entirely on how long it gets wedged in the target buffer queues, disk >speed, etc. A request that happens to hit cache can come back very >quickly, while other requests can be quite slow. I'll just chime in here with a simple "me too." I see what appears to be the same symptoms, although apparently a lot more in the way of performance degredation. -- Jesse Becker NHGRI Linux support (Digicon Contractor) |