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From: | Anthony Liguori |
Subject: | Re: [Qemu-devel] [RFC] Disk integrity in QEMU |
Date: | Sun, 12 Oct 2008 13:02:57 -0500 |
User-agent: | Thunderbird 2.0.0.17 (X11/20080925) |
Dor Laor wrote:
Avi Kivity wrote:Since there is ongoing effort (both by IT and developers) to keep the base images as big as possible, it guarantees that this data is best suited for caching in the host while the private leaf images will be uncached.
A proper CAS solution is really such a better approach. qcow2 deduplification is an interesting concept, but such a hack :-)
This way we provide good performance and caching for the shared parent images while also promising correctness.
You get correctness by using O_DSYNC. cache=off should disable the use of the page cache everywhere.
Regards, Anthony Liguori
Actually this is what happens on mainline qemu with cache=off. Cheers, Dor -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to address@hidden More majordomo info at http://vger.kernel.org/majordomo-info.html
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