Messages in this thread | | | Date | Fri, 30 May 2008 03:31:49 -0400 | From | Christoph Hellwig <> | Subject | Re: [help]How to block new write in a "Thin Provisioning" logical volume manager as a virtual device driver when physical spaces run out? |
| |
On Fri, May 30, 2008 at 09:04:41AM +1000, Dave Chinner wrote: > > In a block based thin provisioning system, like you proposed, there > > is no way to free up space. Once a user's filesystem has written a > > block, it is allocated - when the user deletes a file inside the > > filesystem, the space will not be freed again... > > That's where we've been discussing bio hints to help communicate > space being allocated and freed by the filesystem to the lower layers.
Or use the XFS multiple subvolume support based on that:
http://verein.lst.de/~hch/xfs/xfs-multiple-containers.txt
and yeah, I really need to finish the lose bits up and actually post it. Hopefully next month.
| |