> From: drbd-user-boun...@lists.linbit. > Sent: Wednesday, December 29, 2010 4:49 PM > > I really think drbd is being brain-dead here. Concurrent writes to > the same LBA aren't an issue... just do it! Note the below is using a > primary/secondary setup on two raw drbd devices; no GFS anywhere.
<snip> But the result is undefined! What should DRBD write to the other member? The result of the first or the second write? You are using a tool that permits the execution of stupid I/O streams. Good for stress testing, but not good for data integrity. If you want undefined data on a DRBD pair, then disconnect before the I/O, do the undefined thing, and upon reconnect DRBD will faithfully replicate the garbage. It will still be undefined stuff, but it will be identical undefined stuff. Dan in Atlanta
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