On Tue, 2002-02-05 at 15:26, Wietse Venema wrote: > Erik Smit: > > On Tue, 2002-02-05 at 14:08, Wietse Venema wrote: > > > Erik Smit: > > > > On Tue, 2002-02-05 at 04:20, Wietse Venema wrote: > > > > > ext3 is unsafe for maildir, and with softupdates, so is ffs. > > > > > One step forwards, two steps back. > > > > > > > > > > Fortunately, some people still have a choice. > > > > > > > > For the newbies among us (me :) would you mind explaining what exactly > > > > causes it to be unsafe? As far I know (but like I said, I'm just a noob) > > > > ext3 is journalling metadata and data so I cannot understand how data > > > > could be lost. > > > > > > maildir delivery requires that certain file system operations are > > > atomic and synchronous. > > > > > > [...] > > > > > > Translated into ext3 speak that means: the link and unlink operations > > > are written to the log before the respective system call returns. > > > > Excuse my ignorance, but since it has been written to log and the > > machine would crash before the systemcall returns wouldn't this mean it > > would be recovered (by journal replaying) during boot? > > IFF the information is written to the ON DISK log, then the > recovery is possible. Wasn't that the whole point to journaling filesystems (and chattr +S)? Regards, Erik Smit
