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From: | Liu Yuan |
Subject: | Re: [Qemu-devel] [PATCH] sheepdog: implement direct write semantics |
Date: | Tue, 08 Jan 2013 17:45:54 +0800 |
User-agent: | Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/17.0 Thunderbird/17.0 |
On 01/08/2013 05:40 PM, Stefan Hajnoczi wrote: > Otherwise use sheepdog writeback and let QEMU block.c decide when to > flush. Never use sheepdog writethrough because it's redundant here. I don't get it. What do you mean by 'redundant'? If we use virtio & sheepdog block driver, how can we specify writethrough mode for Sheepdog cache? Here 'writethrough' means use a pure read cache, which doesn't need flush at all. Thanks, Yuan
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