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From: | Dietmar Maurer |
Subject: | Re: [Qemu-devel] [PATCH v4 2/6] add basic backup support to block driver |
Date: | Mon, 25 Feb 2013 15:49:11 +0000 |
> > We previously used LVM and run backup with 'idle' IO priority (CFQ) to avoid > such behavior. > > > > But qemu does not provide an IO queue where we can set scheduling > priorities? > > QEMU block jobs support rate-limiting. Set it to 10-20% of the disk's > throughput > and the slowness should go away but the backup takes longer. Sorry, but I don't want to set a rate limit. I want to set an IO priority - this is something different. My solution does not delay the backup.
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