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Re: [PATCH 0/1] qcow2: Skip copy-on-write when allocating a zero cluster
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From: |
Alberto Garcia |
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Subject: |
Re: [PATCH 0/1] qcow2: Skip copy-on-write when allocating a zero cluster |
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Date: |
Wed, 19 Aug 2020 17:53:07 +0200 |
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User-agent: |
Notmuch/0.18.2 (http://notmuchmail.org) Emacs/24.4.1 (i586-pc-linux-gnu) |
On Wed 19 Aug 2020 05:37:12 PM CEST, Alberto Garcia wrote:
> I ran the test again on a newly created filesystem just to make sure,
> here are the full results (numbers are IOPS):
>
> |----------------------+-------+-------|
> | preallocation | ext4 | xfs |
> |----------------------+-------+-------|
> | off | 11688 | 6981 |
> | off (w/o ZERO_RANGE) | 2780 | 3196 |
> | metadata | 9132 | 5764 |
> | falloc | 13108 | 5727 |
> | full | 16351 | 40759 |
> |----------------------+-------+-------|
Oh, and this is probably relevant, but the ext4 fs has much more free
space than the xfs one (which is almost full with the fully allocated
image). I'll try to run the tests again tomorrow with a larger
filesystem.
Berto
- Re: [PATCH 0/1] qcow2: Skip copy-on-write when allocating a zero cluster, (continued)
- Re: [PATCH 0/1] qcow2: Skip copy-on-write when allocating a zero cluster, Vladimir Sementsov-Ogievskiy, 2020/08/14
- Re: [PATCH 0/1] qcow2: Skip copy-on-write when allocating a zero cluster, Kevin Wolf, 2020/08/17
- Re: [PATCH 0/1] qcow2: Skip copy-on-write when allocating a zero cluster, Brian Foster, 2020/08/19
- Re: [PATCH 0/1] qcow2: Skip copy-on-write when allocating a zero cluster, Alberto Garcia, 2020/08/20
- Re: [PATCH 0/1] qcow2: Skip copy-on-write when allocating a zero cluster, Dave Chinner, 2020/08/20
- Re: [PATCH 0/1] qcow2: Skip copy-on-write when allocating a zero cluster, Brian Foster, 2020/08/21
- Re: [PATCH 0/1] qcow2: Skip copy-on-write when allocating a zero cluster, Alberto Garcia, 2020/08/21
- Re: [PATCH 0/1] qcow2: Skip copy-on-write when allocating a zero cluster, Alberto Garcia, 2020/08/21
- Re: [PATCH 0/1] qcow2: Skip copy-on-write when allocating a zero cluster, Brian Foster, 2020/08/21
- Re: [PATCH 0/1] qcow2: Skip copy-on-write when allocating a zero cluster, Alberto Garcia, 2020/08/25
- Re: [PATCH 0/1] qcow2: Skip copy-on-write when allocating a zero cluster, Brian Foster, 2020/08/25
- Re: [PATCH 0/1] qcow2: Skip copy-on-write when allocating a zero cluster, Alberto Garcia, 2020/08/25