<div>Dave, as much as I wouldent mind playing with that... I dont believe my uppers will go for changing this... one of those... "I have been doing this for 20 years... i know everyting and like the way things are".</div>
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<div>I guess im just stuck with my io bottleneck... but thanks for the knowledge that you could actually change that. </div>
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<div>I will look into the nice command... I have actually ground up quite a bit of the processor before.<br><br></div>
<div class="gmail_quote">On Wed, May 7, 2008 at 7:06 PM, David Black <<a href="mailto:dave@jamsoft.com">dave@jamsoft.com</a>> wrote:<br>
<blockquote class="gmail_quote" style="PADDING-LEFT: 1ex; MARGIN: 0px 0px 0px 0.8ex; BORDER-LEFT: #ccc 1px solid">You may find using a different I/O scheduler will help. Assuming a 2.6<br>kernel, here's some background: <a href="http://www.linuxjournal.com/article/6931" target="_blank">http://www.linuxjournal.com/article/6931</a><br>
<br>In recent 2.6 kernels the default I/O scheduler is cfq, and is<br>selectable on a per-device basis. Here's how to change it to (for<br>instance) deadline for /dev/hda:<br><br># cd /sys/block/hda/queue<br># cat scheduler<br>
noop anticipatory deadline [cfq]<br># echo deadline > scheduler<br># cat scheduler<br>noop anticipatory [deadline] cfq<br><br>The 'best' I/O scheduler depends on the kind of load the machine is<br>seeing. Since there are currently only four to choose from, why not try<br>
your test with each?<br><br>Dave<br>
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<div class="Wj3C7c"><br>Jason Watts wrote:<br>> so... i discovered (it was quite obvious actually) that to run an rsync<br>> and an un-tar command at the same time on the same set of drives that it<br>> really causes the system to lag.<br>
><br>> My question is for the next time I need to do something like that. how<br>> would I set the priority of the un-tar to a lower priority... that way<br>> it is only using what resources are left over that aren't being used?<br>
> if that's really possible (my bottleneck was actually the spindle<br>> speeds of the drives)<br>><br>> thanks,<br>> Jason<br>><br>><br></div></div>> ------------------------------------------------------------------------<br>
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