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

Christof Amelunxen ca at ordix.de
Wed Dec 14 19:51:04 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.


Lars Marowsky-Bree wrote:
> On 2005-12-14T18:59:29, Christof Amelunxen <ca at ordix.de> wrote:
>> 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?
> The writes are lost.

Does that mean in this case automatical failover without any human
intervention is not possible at all if data loss is unacceptable?


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