On Tue, Apr 23, 2013 at 03:11:26PM -0400, Wolfgang Richter wrote: > On Tue, Apr 23, 2013 at 2:31 PM, Wolfgang Richter <w...@cs.cmu.edu> wrote: > > > On Tue, Apr 23, 2013 at 2:21 PM, Stefan Hajnoczi <stefa...@gmail.com>wrote: > > > >> Eric's suggestion to use NBD makes sense to me. The block-backup code > >> can be extended fairly easier using sync mode=none (do not perform a > >> background copy of the entire disk) and by disabling the bitmap > >> (essentially "tap" mode). > > > > > Also, as another thought, I think I can actually use the bitmap to implement > an optimization. In my code, I already use a bitmap to determine which > sectors I want to introspect (ignoring portions of the disk greatly reduces > required bandwidth and overhead; swap space for example isn't generally > interesting unless you can interpret memory as well). So I think I can > adapt > my code here as well.
Cool. By the way, do you actually care about the data being written or just which sectors were touched? Stefan
