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Re: [Qemu-block] [Qemu-devel] [PATCH v6] migration/block: use blk_pwrite
From: |
858585 jemmy |
Subject: |
Re: [Qemu-block] [Qemu-devel] [PATCH v6] migration/block: use blk_pwrite_zeroes for each zero cluster |
Date: |
Mon, 24 Apr 2017 15:40:05 +0800 |
On Mon, Apr 17, 2017 at 12:00 PM, 858585 jemmy <address@hidden> wrote:
> On Mon, Apr 17, 2017 at 11:49 AM, Fam Zheng <address@hidden> wrote:
>> On Fri, 04/14 14:30, 858585 jemmy wrote:
>>> Do you know some other format which have very small cluster size?
>>
>> 64k is the default cluster size for qcow2 but it can be configured at image
>> creation time, as 512 bytes, for example:
>>
>> $ qemu-img create -f qcow2 test.qcow2 -o cluster_size=512 1G
>
> Thanks, i will test the performance again.
I find the performance reduce when cluster size is 512.
I will optimize the performance and submit a patch later.
Thanks.
>>
>> Fam
- [Qemu-block] [PATCH v6] migration/block: use blk_pwrite_zeroes for each zero cluster, jemmy858585, 2017/04/12
- Re: [Qemu-block] [PATCH v6] migration/block: use blk_pwrite_zeroes for each zero cluster, Stefan Hajnoczi, 2017/04/13
- Re: [Qemu-block] [PATCH v6] migration/block: use blk_pwrite_zeroes for each zero cluster, Fam Zheng, 2017/04/14
- Re: [Qemu-block] [PATCH v6] migration/block: use blk_pwrite_zeroes for each zero cluster, 858585 jemmy, 2017/04/14
- Re: [Qemu-block] [Qemu-devel] [PATCH v6] migration/block: use blk_pwrite_zeroes for each zero cluster, Fam Zheng, 2017/04/16
- Re: [Qemu-block] [Qemu-devel] [PATCH v6] migration/block: use blk_pwrite_zeroes for each zero cluster, 858585 jemmy, 2017/04/17
- Re: [Qemu-block] [Qemu-devel] [PATCH v6] migration/block: use blk_pwrite_zeroes for each zero cluster,
858585 jemmy <=
- Re: [Qemu-block] [Qemu-devel] [PATCH v6] migration/block: use blk_pwrite_zeroes for each zero cluster, 858585 jemmy, 2017/04/24
- Re: [Qemu-block] [Qemu-devel] [PATCH v6] migration/block: use blk_pwrite_zeroes for each zero cluster, Fam Zheng, 2017/04/24
- Re: [Qemu-block] [Qemu-devel] [PATCH v6] migration/block: use blk_pwrite_zeroes for each zero cluster, 858585 jemmy, 2017/04/24
- Re: [Qemu-block] [Qemu-devel] [PATCH v6] migration/block: use blk_pwrite_zeroes for each zero cluster, Fam Zheng, 2017/04/24
- Re: [Qemu-block] [Qemu-devel] [PATCH v6] migration/block: use blk_pwrite_zeroes for each zero cluster, 858585 jemmy, 2017/04/24
- Re: [Qemu-block] [Qemu-devel] [PATCH v6] migration/block: use blk_pwrite_zeroes for each zero cluster, Fam Zheng, 2017/04/24
- Re: [Qemu-block] [Qemu-devel] [PATCH v6] migration/block: use blk_pwrite_zeroes for each zero cluster, 858585 jemmy, 2017/04/24
Re: [Qemu-block] [PATCH v6] migration/block: use blk_pwrite_zeroes for each zero cluster, Stefan Hajnoczi, 2017/04/14