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Re: [Xen-users] Disk performance

To: xen-users@xxxxxxxxxxxxxxxxxxx
Subject: Re: [Xen-users] Disk performance
From: Bart Coninckx <bart.coninckx@xxxxxxxxxx>
Date: Sat, 3 Jul 2010 16:43:01 +0200
Cc: Jonathan Tripathy <jonnyt@xxxxxxxxxxx>
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On Saturday 03 July 2010 15:17:13 Jonathan Tripathy wrote:
> Hi Everyone,
> 
> My Xen host has 2 X 1TB hard drives in a RAID1 setup. If one DomU starts
> to dd a 5GB file (A ran it in a loop as a test), access ssh on the other
> DomU becomes very slow.
> 
> Is this normal?
> 
> Many Thanks
> 
> _______________________________________________
> Xen-users mailing list
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> 

I think this can be expected with things like a dd which could hog the disk 
bandwidth. Do a bonnie++ benchmark to see what the disk can do and then do a 
iotop while you are doing the dd and you will see how much is consumed and how 
much is left for the other DomUs.

B.

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