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Re: [Qemu-block] [PATCH] qcow2: Optimize L2 table cache size based on im
Re: [Qemu-block] [PATCH] qcow2: Optimize L2 table cache size based on image and cluster sizes
Fri, 7 Oct 2016 09:46:31 -0400
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On 10/07/2016 06:56 AM, Alberto Garcia wrote:
I would like to know what's the use case you (Frank, Ed)
are thinking about:
- Are we talking about command-line options, QMP, or both?
Command-line options alone are sufficient for my use case, which is configuring
and starting VMs using libvirt.
- Do you know the size of the disk image or you want to be able to set
the cache size without having access to that information? In other
words, what's preventing you from calculating the cache size that you
I know the disk image size, and can set cache size in bytes. l2-cache-size=max
would be a convenience feature, *especially if it could become the default*.
Then I could forget thinking about whether the image is larger than the current
8GB fully-cached threshold, and only have to calculate cache size in bytes in
case of very large images, multiple backing files, or very tight memory.
[Qemu-block] [PATCH v2] qcow2: Add cache-size=max option to optimize caches for performance, Ed Swierk, 2016/10/04
Re: [Qemu-block] [PATCH] qcow2: Optimize L2 table cache size based on image and cluster sizes, Frank Myhr, 2016/10/06