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| From: | Anthony Liguori |
| Subject: | Re: [Qemu-devel] Re: Strategic decision: COW format |
| Date: | Mon, 14 Mar 2011 10:13:22 -0500 |
| User-agent: | Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.14) Gecko/20110223 Lightning/1.0b2 Thunderbird/3.1.8 |
On 03/14/2011 10:03 AM, Kevin Wolf wrote:
The only problem with them is that they are metadata that must be updated. However, I think we have discussed enough how to avoid the greatest part of that cost.Maybe I missed it, but in the WCE=0 mode, is it really possible to avoid the writes for the refcount table?Protected by a dirty flag (and/or a journal), sure. I mean, wasn't that the whole point of starting the qcow3 discussion?
Okay, I thought you had something else in mind. Regards, Anthony Liguori
Kevin
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