答复: [Libvir] Is it possible to add an interface to intercept themigration process?
Jack.Meng
Jack.Meng at Sun.COM
Thu Oct 18 17:32:21 UTC 2007
Hi Dan,
Thanks for the info,
/Jack
> -----邮件原件-----
> 发件人: libvir-list-bounces at redhat.com
> [mailto:libvir-list-bounces at redhat.com] 代表 Daniel P. Berrange
> 发送时间: 2007年10月18日 23:28
> 收件人: Jack Meng
> 抄送: libvir-list at redhat.com; mengran at tsinghua.org.cn
> 主题: Re: [Libvir] Is it possible to add an interface to
> intercept themigration process?
>
>
> On Thu, Oct 18, 2007 at 05:29:53PM +0800, Jack Meng wrote:
> > Thanks for your reply.
> > Actually I'm thinking about how to recognize the same storage
> > (probably
> > external), not things on them. Sometimes storages are
> shared between
> > hosts but have different paths to access, e.g., for fibre channel
> > storages. So an update to the conf file is probably needed
> here to let
> > the dest attach 'right' storages.
>
> Frankly this is a a solved problem already. If you need
> persistent device names, don't use /dev/sdN.
>
> With SAN you can use device mapper multipath to make your
> devices appear as /dev/mpath/<WWN> where WWN is the world
> world name for the LUN. Or you can setup udev rules to give
> a similar persistent name. 'man scsi_id'
>
> Re-writing config files in Xen or libvir is just the wrong
> place todo this.
>
> Dan.
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