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Re: [linux-lvm] Cluster LVM



On Thu, Feb 28, 2002 at 05:03:37AM -0800, Prashant Kharche wrote:
> 
>   Basically, we are putting a lock on the VG while it
> is getting resized or for any tool which tries to
> access VG .. So that no other user can access the
> metadata of that VG.. 
> WE ARE ONLY MATAINING THE CONSISTENCY OF THE VG
> METADATA.. 
> We thought of protecting VG DATA (NOT METADATA), but
> it becomes very completed.. so as if now we are not
> taking care of FS access..  

You need to take care that the volume groups running on all nodes
*always* reflect the metadata on disk.

For instance, if have two nodes running vg0/lvol0, and I issue a
pvmove from node1, when does node2 find out that the mapping has
changed ?

- Joe



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