linux-kernel - Re: Disk schedulers

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Message-ID: <47B4D697.3030106@gmail.com>
Date:	Fri, 15 Feb 2008 09:02:31 +0900
From:	Tejun Heo <htejun@...il.com>
To:	Lukas Hejtmanek <xhejtman@....muni.cz>
CC:	linux-kernel@...r.kernel.org
Subject: Re: Disk schedulers

Lukas Hejtmanek wrote:
> Hello,
> 
> whom should I blame about disk schedulers?
> 
> I have the following setup:
> 1Gb network
> 2GB RAM
> disk write speed about 20MB/s
> 
> If I'm scping file (about 500MB) from the network (which is faster than the
> local disk), any process is totally unable to read anything from the local disk
> till the scp finishes. It is not caused by low free memory, while scping
> I have 500MB of free memory (not cached or buffered).
> 
> I tried cfq and anticipatory scheduler, none is different.
> 

Does deadline help?

-- 
tejun
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