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From: | Paolo Bonzini |
Subject: | Re: [Qemu-block] [Qemu-devel] [PATCH 3/3] block: mirror - zero unallocated target sectors when zero init not present |
Date: | Wed, 30 Sep 2015 17:16:36 +0200 |
User-agent: | Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.2.0 |
On 30/09/2015 16:43, Jeff Cody wrote: > One issue is that QEMU will do mode!='existing' && sync!='full' for > drivers that do not support backing files (raw host devices, for > instance). Yup, this can be used to get a mirror of future operations (the idea was to support things such as antiviruses, where the antivirus connects to QEMU via NBD). I think it's okay to ignore this case, since the resulting image is bogus anyway. What is interesting is only the stream of writes which you can get through NBD. Paolo
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