Re: Resizing bcache backing store
On Thu, Nov 01, 2012 at 07:06:01PM +0000, James Sefton wrote:
> Kent Overstreet <koverstreet <at> ...> writes:
> > For the backing device, I think things will just work - you'll just
> > have to close and reopen the backing device in order for bcache to
> > notice the new size. Bcache's superblock doesn't remember the size, it
> > just goes off of what the size of the backing device is when it's
> > registered.
> > There's currently no way to make bcache notice the backing device has
> > grown to do it at runtime, though that ought to be fairly simple too.
> > On Wed, Apr 11, 2012 at 6:47 PM, David Rhodes Clymer
> > <david <at> ...> wrote:
> > > In the case where the bcache backing store is resizeable (eg. a
> > > logical volume), is it possible to resize the backing store without
> > > breaking bcache? Let's say, for example, that I would
> > > unmount/unregister /dev/bcacheX, resize the backing store,
> > > reregister/remount the cache.
> > >
> > > I imagine a better approach would be to layer LVM on the cache device
> > > itself. However, in this particular case, I set up the bcache before I
> > > had learned how to get LVM to use a bcache device as a PV.
> > >
> > > -davidc
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