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Re: [Libguestfs] [PATCH 4/5] daemon: lvm: list PVs/VGs/LVs with --foreign



On Tue, Jul 26, 2016 at 05:41:28PM +0200, Pino Toscano wrote:
> The appliance has no LVM system ID set, which means that lvm commands
> will ignore VGs with a system ID set to anything.  Since we want to work
> with them, pass --foreign at least when listing them to see them.
> 
> See also lvmsystemid(7).

This is sort of a hack, if I'm understanding correctly.  Can we not
instead give the appliance a "system ID"?

Also, lvm(8) says:

       --foreign
              Cause the command to access foreign VGs, that would otherwise be
              skipped.  It can be used to report or display a VG that is owned
              by  another  host.   This  option can cause a command to perform
              poorly because lvmetad caching is not used and metadata is  read
              from disks.

which sounds bad.

Rich.

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