Re: Domain Save Image Format proposal (draft B)

[Andrew Cooper <andrew.cooper3@citrix.com>]

On 10/02/14 17:20, David Vrabel wrote:
> Here is a draft of a proposal for a new domain save image format.  It
> does not currently cover all use cases (e.g., images for HVM guest are
> not considered).
>
> http://xenbits.xen.org/people/dvrabel/domain-save-format-B.pdf
>
> Introduction
> ============
>
> Revision History
> ----------------
>
> --------------------------------------------------------------------
> Version  Date         Changes
> -------  -----------  ----------------------------------------------
> Draft A  6 Feb 2014   Initial draft.
>
> Draft B  10 Feb 2014  Corrected image header field widths.
>
>                       Minor updates and clarifications.
> --------------------------------------------------------------------
>
> Purpose
> -------
>
> The _domain save image_ is the context of a running domain used for
> snapshots of a domain or for transferring domains between hosts during
> migration.
>
> There are a number of problems with the format of the domain save
> image used in Xen 4.4 and earlier (the _legacy format_).
>
> * Dependant on toolstack word size.  A number of fields within the
>   image are native types such as `unsigned long` which have different
>   sizes between 32-bit and 64-bit hosts.  This prevents domains from
>   being migrated between 32-bit and 64-bit hosts.

s/hosts/toolstacks/ (or toolstack domains)

~Andrew