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Re: [Qemu-devel] CoW image commit+shrink(= make_empty) support
From: |
Kevin Wolf |
Subject: |
Re: [Qemu-devel] CoW image commit+shrink(= make_empty) support |
Date: |
Mon, 11 Jun 2012 09:59:42 +0200 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:12.0) Gecko/20120430 Thunderbird/12.0.1 |
Am 10.06.2012 18:10, schrieb Paolo Bonzini:
> Il 08/06/2012 19:57, Kevin Wolf ha scritto:
>>>>
>>>> I agree, doing it like mirroring for new writes on the top layer makes
>>>> sense, as long as you are willing to violate the (optional) speed
>>>> parameter. I wouldn't think violating the speed parameter in that case
>>>> would be an issue, as long as it is a documented affect of performing a
>>>> live commit on the active (top) layer.
>> The question is what the speed parameter really means for a live commit
>> block job (or for an active mirror). I think it would make sense to
>> limit only the speed of I/O that doesn't come from the guest but is from
>> the background copying.
>
> Not necessarily, you can throttle the copying speed. If the I/O from
> the guest has bursts, you will pick up the work later when the rate
> calms down.
Then it's not an active mirror any more, but a passive one.
Kevin
- Re: [Qemu-devel] CoW image commit+shrink(= make_empty) support, (continued)
- Re: [Qemu-devel] CoW image commit+shrink(= make_empty) support, Stefan Hajnoczi, 2012/06/08
- Re: [Qemu-devel] CoW image commit+shrink(= make_empty) support, Jeff Cody, 2012/06/08
- Re: [Qemu-devel] CoW image commit+shrink(= make_empty) support, Kevin Wolf, 2012/06/08
- Re: [Qemu-devel] CoW image commit+shrink(= make_empty) support, Jeff Cody, 2012/06/08
- Re: [Qemu-devel] CoW image commit+shrink(= make_empty) support, Kevin Wolf, 2012/06/08
- Re: [Qemu-devel] CoW image commit+shrink(= make_empty) support, Jeff Cody, 2012/06/08
- Re: [Qemu-devel] CoW image commit+shrink(= make_empty) support, Kevin Wolf, 2012/06/08
- Re: [Qemu-devel] CoW image commit+shrink(= make_empty) support, Jeff Cody, 2012/06/09
- Re: [Qemu-devel] CoW image commit+shrink(= make_empty) support, Kevin Wolf, 2012/06/11
- Re: [Qemu-devel] CoW image commit+shrink(= make_empty) support, Paolo Bonzini, 2012/06/10
- Re: [Qemu-devel] CoW image commit+shrink(= make_empty) support,
Kevin Wolf <=
- Re: [Qemu-devel] CoW image commit+shrink(= make_empty) support, Paolo Bonzini, 2012/06/11
- Re: [Qemu-devel] CoW image commit+shrink(= make_empty) support, Stefan Hajnoczi, 2012/06/11
- Re: [Qemu-devel] CoW image commit+shrink(= make_empty) support, Kevin Wolf, 2012/06/11
- Re: [Qemu-devel] CoW image commit+shrink(= make_empty) support, Stefan Hajnoczi, 2012/06/11
- Re: [Qemu-devel] CoW image commit+shrink(= make_empty) support, Jeff Cody, 2012/06/11
- Re: [Qemu-devel] CoW image commit+shrink(= make_empty) support, Paolo Bonzini, 2012/06/11
- Re: [Qemu-devel] CoW image commit+shrink(= make_empty) support, Zhi Hui Li, 2012/06/12
- Re: [Qemu-devel] CoW image commit+shrink(= make_empty) support, Stefan Hajnoczi, 2012/06/12
- Re: [Qemu-devel] CoW image commit+shrink(= make_empty) support, Supriya Kannery, 2012/06/13
- Re: [Qemu-devel] CoW image commit+shrink(= make_empty) support, Zhi Hui Li, 2012/06/14