[DRBD-user] Question about Linux-HA, stonith and data loss

Christof Amelunxen ca at ordix.de
Wed Dec 14 18:59:29 CET 2005

Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.


Hi all,

we are currently implementing an informix dbms cluster using Linux-HA
(1.2.3) and drbd (0.7.5) on SLES9 SP2. Everything is working perfectly
well so far, thanks a lot for all the work that has been done.

I have a question about a special situation that may be an FAQ but still I
didnt find any answers yet:

1. NodeA (P) --- NodeB (S)   # everything ok
2. NodeA (P) - - NodeB (S)   # DRBD detects connection loss, goes WFC
3. NodeA (P) - - NodeB (S)   # Linux-HA detects split brain, A kills B
4.   /       - - NodeB (P)   # NodeB takes over, goes primary

There have been writes on NodeA between step 2 and 3. These are lost after
Linux-HA has killed A and made B primary. I know the best solution is to
avoid this situation by any chance and we are using serial heartbeats,
too, but what if it happens anyway?


Thanks for any help,
Christof







More information about the drbd-user mailing list