On 6 January 2011 20:01, Olaf van der Spek <olafvds...@gmail.com> wrote: > Hi, > > Does btrfs support atomic file data replaces?
Hi Olaf, Yes btrfs does support atomic replace, since kernel 2.6.30 circa June 2009. [1] Special handling was added to ext3, ext4, btrfs (and probably other Linux FSs) for your replace-via-truncate and the alternative replace-via-rename application patterns. Try reading "Delayed allocation and the zero-length file problem" article and comments by Ted Ts'o for further discussion. [2] Mike -- [1] http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=5a3f23d515a2ebf0c750db80579ca57b28cbce6d [2] http://thunk.org/tytso/blog/2009/03/12/delayed-allocation-and-the-zero-length-file-problem/ -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
