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From: | Anthony Liguori |
Subject: | Re: [Qemu-devel] Default cache mode |
Date: | Wed, 29 Jun 2011 07:06:03 -0500 |
User-agent: | Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.17) Gecko/20110424 Lightning/1.0b2 Thunderbird/3.1.10 |
On 06/29/2011 06:59 AM, Kevin Wolf wrote:
Hi, I think we have touched this topic before during some IRC discussions or somewhere deep in a mailing list thread, but I think it hasn't been discussed on the list. Our default cache mode of cache=writethrough is extremely conservative and provides absolute safety at the cost of performance,
But for the most part, we track bare metal fairly well in terms of block performance, no?
Or are you really referring to qcow2 as a specific example? In the past, we used a different default caching mode for qcow2. I think that could be done again if there was a compelling reason.
Regards, Anthony Liguori
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