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Re: [Qemu-devel] [RFC 0/8] block: Live backup prototype
From: |
Dietmar Maurer |
Subject: |
Re: [Qemu-devel] [RFC 0/8] block: Live backup prototype |
Date: |
Mon, 11 Mar 2013 08:58:24 +0000 |
> > We track zero blocks at 4KB level to get small backup files. Restore
> > can handle those blocks differently, either pre-allocate or create holes.
> > That
> can even be a restore option.
>
> You are right, the behavior can be set at restore time.
>
> I'm curious how much of a win the 4 KB zero detection is on random Linux or
> Windows guest images. Have you collected numbers?
Well, seems that it does not help much - it saves about 0.2% space. So maybe we
can remove that feature (and increase address space in the VMA format instead).
- [Qemu-devel] [RFC 8/8] Add backup.py tool, (continued)
- [Qemu-devel] [RFC 8/8] Add backup.py tool, Stefan Hajnoczi, 2013/03/09
- [Qemu-devel] [RFC 3/8] backup: write to BlockDriverState instead of BackupDumpFunc, Stefan Hajnoczi, 2013/03/09
- Re: [Qemu-devel] [RFC 0/8] block: Live backup prototype, Dietmar Maurer, 2013/03/10
- Re: [Qemu-devel] [RFC 0/8] block: Live backup prototype, Stefan Hajnoczi, 2013/03/10
- Re: [Qemu-devel] [RFC 0/8] block: Live backup prototype, Dietmar Maurer, 2013/03/10
- Re: [Qemu-devel] [RFC 0/8] block: Live backup prototype, Stefan Hajnoczi, 2013/03/10
- Re: [Qemu-devel] [RFC 0/8] block: Live backup prototype,
Dietmar Maurer <=
- Re: [Qemu-devel] [RFC 0/8] block: Live backup prototype, Dietmar Maurer, 2013/03/11
- Re: [Qemu-devel] [RFC 0/8] block: Live backup prototype, Stefan Hajnoczi, 2013/03/11
- Re: [Qemu-devel] [RFC 0/8] block: Live backup prototype, Dietmar Maurer, 2013/03/11
- Re: [Qemu-devel] [RFC 0/8] block: Live backup prototype, Stefan Hajnoczi, 2013/03/11
Re: [Qemu-devel] [RFC 0/8] block: Live backup prototype, Dietmar Maurer, 2013/03/10