Re: howto boost write(2) performance?

[Gustavo Chain]

El Tue, 09 Oct 2007 15:50:17 +0200
Michael Stiller <ms@xxxxxxxxxx> escribiÃ:

> Hi list,
> 
> i'm developing an application (in C) which needs to write about 
> 1Gbit/s (125Mb/s) to a disk array attached via U320 SCSI. 
> It runs on Dual Core 2 Xeons @2Ghz utilizing kernel 2.6.22.7. 
> 
> I buffer the data in (currently 4) 400Mb buffers and use write(2) in a
> dedicated thread to write them to the raw disk (no fs). 
> 
> The write(2) performance is not good enough, the writer threads take
> to much time, and i ask you for ideas, howto to boost the write
> performance. 
> 
> Maybe mmaping the disk would work? 
> 
> Cheers,
> 
> -Michael
> 
> PS. I would like to be cc'd as i usually don't read the list due to
> high traffic.
> 
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Create a 1GB ram disk, write data there, and then backup into a hard
disk

-- 
Gustavo ChaÃn Dumit
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