| |||||||||||||
snapshots?snapshots?Posted Feb 2, 2006 16:06 UTC (Thu) by anton (guest, #25547)In reply to: snapshots? by nix Parent article: MD / DM
Log-structured filesystems are one of those things that seem terribly neat at the start --- Recant was originally going to be a log-structured FS --- but I spent some time trying to figure out a way to expire them without doing a massive pass over the entire disk and vast memory consumption and never thought of a way. Well, I also failed to see a good way for combining the segments and garbage collection ideas of the original LFS proposals with snapshots and clones; moreover, the speed disadvantages of using a free-blocks approach seem to have been mostly eliminated by clustering and delayed writing. But other ideas and properties of log-structured file systems still seem to be worthwhile to me, in particular the possibility of having decent data consistency guarantees and snapshots. So my thoughts have turned to implementing LFSs with mostly conventional free-blocks management, and I have written up these ideas.
(Log in to post comments)
|
|||||||||||||