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Re: [Qemu-devel] [PATCH 1/5] RFC: Efficient VM backup for qemu (v1)
From: |
Stefan Hajnoczi |
Subject: |
Re: [Qemu-devel] [PATCH 1/5] RFC: Efficient VM backup for qemu (v1) |
Date: |
Fri, 23 Nov 2012 06:23:09 +0100 |
On Thu, Nov 22, 2012 at 6:46 PM, Dietmar Maurer <address@hidden> wrote:
>> > Did you look at the VMDK "Stream-Optimized Compressed" subformat?
>>
>> We've gone down several sub-threads discussing whether VMDK is suitable.
>> I want to summarize why this is a good approach:
>>
>> The VMDK format already allows for out-of-order data and is supported by
>> existing tools - this is very important for backups where people are
>> (rightfully) paranoid about putting their backups in an obscure format. They
>> want to be able to access their data years later, whether your tool is still
>> around or not.
>
> The VMDK format has strong disadvantages:
>
> - unclear License (the spec links to patents)
I've already pointed out that you're taking an inconsistent position
on this point. It's FUD.
> - they use a very slow compression algorithm (deflate), which makes it
> unusable for backup
I've already pointed out that we can optionally support other algorithms.
Stefan
- Re: [Qemu-devel] [PATCH 1/5] RFC: Efficient VM backup for qemu (v1), (continued)
Re: [Qemu-devel] [PATCH 1/5] RFC: Efficient VM backup for qemu (v1), Dietmar Maurer, 2012/11/22
Re: [Qemu-devel] [PATCH 1/5] RFC: Efficient VM backup for qemu (v1), Stefan Hajnoczi, 2012/11/22
Re: [Qemu-devel] [PATCH 1/5] RFC: Efficient VM backup for qemu (v1), Dietmar Maurer, 2012/11/23
Re: [Qemu-devel] [PATCH 1/5] RFC: Efficient VM backup for qemu (v1), Dietmar Maurer, 2012/11/22
Re: [Qemu-devel] [PATCH 1/5] RFC: Efficient VM backup for qemu (v1), Stefan Hajnoczi, 2012/11/23
Re: [Qemu-devel] [PATCH 1/5] RFC: Efficient VM backup for qemu (v1), Dietmar Maurer, 2012/11/22
Re: [Qemu-devel] [PATCH 1/5] RFC: Efficient VM backup for qemu (v1), Stefan Hajnoczi, 2012/11/23
Re: [Qemu-devel] [PATCH 1/5] RFC: Efficient VM backup for qemu (v1), Dietmar Maurer, 2012/11/23
Re: [Qemu-devel] [PATCH 1/5] RFC: Efficient VM backup for qemu (v1), Dietmar Maurer, 2012/11/22
Re: [Qemu-devel] [PATCH 1/5] RFC: Efficient VM backup for qemu (v1), Wenchao Xia, 2012/11/27