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Re: [Qemu-devel] [RFC PATCH 36/36] mirror: allow customizing the granula
From: |
Eric Blake |
Subject: |
Re: [Qemu-devel] [RFC PATCH 36/36] mirror: allow customizing the granularity |
Date: |
Fri, 15 Jun 2012 17:24:57 -0600 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:12.0) Gecko/20120430 Thunderbird/12.0.1 |
On 06/15/2012 09:05 AM, Paolo Bonzini wrote:
> The desired granularity may be very different depending on the kind of
> operation
> (e.g. continous replication vs. collapse-to-raw) and whether the VM is
> expected
> to perform lots of I/O while mirroring is in progress. Allow the user to
> customize
> it.
> +++ b/qapi-schema.json
> @@ -1383,6 +1383,8 @@
> # (all the disk, only the sectors allocated in the topmost image, or
> # only new I/O).
> #
> +# @granularity: #optional granularity of the dirty bitmap, default is 64K.
What happens if the user doesn't pass in a power of 2? Is there a
minimum or maximum acceptable value?
--
Eric Blake address@hidden +1-919-301-3266
Libvirt virtualization library http://libvirt.org
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- [Qemu-devel] [RFC PATCH 25/36] mirror: add support for on_source_error/on_target_error, (continued)
- [Qemu-devel] [RFC PATCH 25/36] mirror: add support for on_source_error/on_target_error, Paolo Bonzini, 2012/06/15
- [Qemu-devel] [RFC PATCH 24/36] mirror: support querying target file, Paolo Bonzini, 2012/06/15
- [Qemu-devel] [RFC PATCH 29/36] mirror: implement completion, Paolo Bonzini, 2012/06/15
- [Qemu-devel] [RFC PATCH 34/36] block: return count of dirty sectors, not chunks, Paolo Bonzini, 2012/06/15
- [Qemu-devel] [RFC PATCH 33/36] mirror: perform COW if the cluster size is bigger than the granularity, Paolo Bonzini, 2012/06/15
- [Qemu-devel] [RFC PATCH 26/36] block: live snapshot documentation tweaks, Paolo Bonzini, 2012/06/15
- [Qemu-devel] [RFC PATCH 35/36] block: allow customizing the granularity of the dirty bitmap, Paolo Bonzini, 2012/06/15
- [Qemu-devel] [RFC PATCH 36/36] mirror: allow customizing the granularity, Paolo Bonzini, 2012/06/15
- Re: [Qemu-devel] [RFC PATCH 36/36] mirror: allow customizing the granularity,
Eric Blake <=
- [Qemu-devel] [RFC PATCH 17/36] block: add bdrv_query_stats, Paolo Bonzini, 2012/06/15
- [Qemu-devel] [RFC PATCH 30/36] add hierarchical bitmap data type and test cases, Paolo Bonzini, 2012/06/15
- [Qemu-devel] [RFC PATCH 18/36] block: make device optional in BlockInfo, Paolo Bonzini, 2012/06/15
- [Qemu-devel] [RFC PATCH 16/36] block: add bdrv_query_info, Paolo Bonzini, 2012/06/15
- [Qemu-devel] [RFC PATCH 31/36] block: implement dirty bitmap using HBitmap, Paolo Bonzini, 2012/06/15
- [Qemu-devel] [RFC PATCH 27/36] block: add bdrv_ensure_backing_file, Paolo Bonzini, 2012/06/15
- [Qemu-devel] [RFC PATCH 28/36] block: add block-job-complete, Paolo Bonzini, 2012/06/15
- [Qemu-devel] [RFC PATCH 32/36] block: make round_to_clusters public, Paolo Bonzini, 2012/06/15