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Re: [Qemu-devel] [PATCH] migration: Increase default max_downtime from 3
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From: |
Amit Shah |
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Subject: |
Re: [Qemu-devel] [PATCH] migration: Increase default max_downtime from 30ms to 300ms |
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Date: |
Fri, 6 Jun 2014 18:20:36 +0530 |
On (Thu) 27 Mar 2014 [14:57:26], Alexey Kardashevskiy wrote:
> The existing timeout is 30ms which on 100MB/s (1Gbit) gives us
> 3MB/s rate maximum. If we put some load on the guest, it is easy to
> get page dirtying rate too big so live migration will never complete.
> In the case of libvirt that means that the guest will be stopped
> anyway after a timeout specified in the "virsh migrate" command and
> this normally generates even bigger delay.
>
> This changes max_downtime to 300ms which seems to be more
> reasonable value.
>
> Signed-off-by: Alexey Kardashevskiy <address@hidden>
Reviewed-by: Amit Shah <address@hidden>
Amit