>> As for online dedupe (which seems useful for reducing writes), would it
>> be useful if one could, given a write request, compare each of the
>> dirty pages in that request against whatever else the fs has loaded in
>> the page cache, and try to dedupe against that? We could probably
>> speed u
On Thu, 25 Oct 2012 23:26:14 -0700, Darrick J. Wong wrote:
>> Now, here's my proposal for fixing that:
>> A BTRFS_IOC_SAME_RANGE ioctl would be ideal. Takes two file
>> descriptors, two offsets, one length, does some locking, checks that
>> the ranges are identical (returns EINVAL if not), and defe
On Wed, Oct 17, 2012 at 11:39:42AM +, Gabriel wrote:
> On Mon, 15 Oct 2012 22:15:16 +0200, David Sterba wrote:
> > On Mon, Oct 15, 2012 at 07:09:23PM +0200, Bob Marley wrote:
> >> I would really appreciate a systemcall (or ioctl or the like) to allow
> >> deduplication of a block of a file agai
On Mon, 15 Oct 2012 22:15:16 +0200, David Sterba wrote:
> On Mon, Oct 15, 2012 at 07:09:23PM +0200, Bob Marley wrote:
>> I would really appreciate a systemcall (or ioctl or the like) to allow
>> deduplication of a block of a file against a block of another file.
>> (ok if blocks need to be aligned
