Messages in this thread |  | | | Date | Sat, 26 Jun 2010 11:27:59 +0200 | | From | Christoph Hellwig <> | | Subject | Re: trying to understand READ_META, READ_SYNC, WRITE_SYNC & co |
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On Sat, Jun 26, 2010 at 07:25:56PM +1000, Nick Piggin wrote: > Biggest thing is multiple small files operations like on the same > directory. Best case I measured back when doing AS io scheduler > versus deadline was about 100x improvement on a uncached kernel > grep workload when competing with a streaming writeout (the writeout > probably ended up going somewhat slower naturally, but it is fairer).
As I mentioned below I absolutely see the case for reads. A normal grep basically is a dependent read kind of workload. For for writes it should either be O_SYNC-style workloads or batched I/O.
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