On Thu, Dec 23, 2010 at 04:49:53PM +0100, Olaf van der Spek wrote: > On Sun, Dec 19, 2010 at 5:39 PM, Olaf van der Spek <olafvdspek@xxxxxxxxx> wrote: > > On Sat, Dec 18, 2010 at 11:15 PM, Calvin Walton <calvin.walton@xxxxxxxxx> wrote: > >> Hmm. Iâm doing a little interpretation of what Olaf said here; but I > >> think you may have misunderstood the question? > >> > >> He doesnât care about whether or not the file is securely written to > >> disk (durable); however he doesnât want to see any partially written > >> files. In other words, something like > >> > >> Â Â 1. Write to temp file > >> Â Â 2. Rename temp file over original file > > > > Meta data, including file owner, should be preserved. > > Ideally, no temp files should be visible either. > > > >> Where the rename is only committed to disk once the entire contents of > >> the file have been written securely â whenever that may eventually > >> happen. > >> > >> He doesnât want to synchronously wait for the file to be written, > >> because the new data isnât particularly important. The only important > >> thing is that the file either contains the old or new data after a > >> filesystem crash; not incomplete data. So, itâs more of an ordering > >> problem, I think? (Analogous to putting some sort of barrier between the > >> file write/close and the file rename to maintain ordering.) > >> > >> Hopefully Iâve interpreted the original question correctly, because this > >> is something I would find interesting as well. > > > > Yes, you did. > > Somebody? So you are looking for something like: http://developer.apple.com/library/mac/#DOCUMENTATION/Darwin/Reference/ManPages/man2/exchangedata.2.html ? Cheers, Dave. -- Dave Chinner david@xxxxxxxxxxxxx -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
