On 17/11/2011 09:19, Alex Peshkoff wrote: > On 11/17/11 14:14, Adriano dos Santos Fernandes wrote: >> On 17/11/2011 07:52, Dmitry Yemanov wrote: >>> The only way to guarantee ordered writes is to flush individual pages >>> and this is what FW=ON does. >> Or to flush group of independent pages at once, like I proposed. I think >> this can be a great improvement for FW=ON. > The suggestion appears very interesting, even with average size of group > == 2 engine shoudl run almost twice faster. > > BTW, Vlad asked about fdatasync (instead of O_DSYNC) performance in multi-thread environment. I didn't noted any problem.
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