Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
On Wed, Jun 15, 2011 at 11:47:20PM +0900, Motoharu Kubo wrote: > Hi Lars, > > > If your file system or application is not crash safe, > > DRBD cannot magically make it so, no matter what, > > regardless of replication protocol. > > I do understand the point. > > For our good usage, could you give me some examples of crash-safe and > non-cclash-safe filesesystems, or good pointer to learn more? "crash-safe file system": hopefully all of them. Of course they will need some sort of crash recovery procedure. The two main categories are: non-journaling file systems (e.g. ext2) need a full fsck run, where the journaling file systems (e.g. ext3) only need a journal replay. Anything that has a reliable crash recovery procedure to recover from hard crash on a single node can safely run on a DRBD based failover cluster. Anything that has serious problems to recover from a hard crash, even on a single node, won't really get better by adding DRBD and failover. -- : Lars Ellenberg : LINBIT | Your Way to High Availability : DRBD/HA support and consulting http://www.linbit.com