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答复: [Libvir] Is it possible to add an interface to intercept themigration process?



Hi Dan,

Thanks for the info,

/Jack

> -----邮件原件-----
> 发件人: libvir-list-bounces redhat com 
> [mailto:libvir-list-bounces 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 redhat com; mengran 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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