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Re: [Qemu-devel] Design of the blobstore

From: Gleb Natapov
Subject: Re: [Qemu-devel] Design of the blobstore
Date: Thu, 15 Sep 2011 13:20:54 +0300

On Thu, Sep 15, 2011 at 06:18:35AM -0400, Stefan Berger wrote:
> On 09/15/2011 01:47 AM, Gleb Natapov wrote:
> >On Wed, Sep 14, 2011 at 01:05:44PM -0400, Stefan Berger wrote:
> >>   One property of the blobstore is that it has a certain required
> >>size for accommodating all blobs of device that want to store their
> >>blobs onto. The assumption is that the size of these blobs is know
> >>a-priori to the writer of the device code and all devices can
> >>register their space requirements with the blobstore during device
> >>initialization. Then gathering all the registered blobs' sizes plus
> >>knowing the overhead of the layout of the data on the disk lets QEMU
> >>calculate the total required (minimum) size that the image has to
> >>have to accommodate all blobs in a particular blobstore.
> >>
> >I do not see the point of having one blobstore for all devices. Each
> >should have its own. We will need permanent storage for UEFI firmware
> >too and creating new UEFI config for each machine configuration is not
> >the kind of usability we want to have.
> >
> You will have the possibility of storing all devices' state into one
> blobstore or each devices' state in its own or any combination in
> between.
Good, thanks.


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