Messages in this thread | | | Date | Mon, 18 Dec 2006 18:24:39 +0545 | From | "Manish Regmi" <> | Subject | Re: Linux disk performance. |
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On 12/18/06, Arjan van de Ven <arjan@infradead.org> wrote: > if you want truely really smooth writes you'll have to work for it, > since "bumpy" writes tend to be better for performance so naturally the > kernel will favor those. > > to get smooth writes you'll need to do a threaded setup where you do an > msync/fdatasync/sync_file_range on a frequent-but-regular interval from > a thread. Be aware that this is quite likely to give you lower maximum > performance than the batching behavior though. >
Thanks...
But isn't O_DIRECT supposed to bypass buffering in Kernel? Doesn't it directly write to disk? I tried to put fdatasync() at regular intervals but there was no visible effect.
-- --------------------------------------------------------------- regards Manish Regmi
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