Hi:
I am providing a HA solution base on hb+drbd7. And I have a question how
hb+drbd prevent data corruption when the following events happen.
Suppose there are two nodes A, B in the cluster.
1. A is primary and B is slavery. The state transforming like this:
A(running) B(running)---->A(running)
B(hangup)---->A(hangup)B(hangup)--->A(hangup)B(start)
When B starts, How can it know that the data will be corrupt and do not
start as primary DRBD.
2. A is primary and B is slavery. The drbd net is broken. Before B know
this( the drbd state switch to *Inconsistent*), A write some data to drbd
disk and hangup. Then how can B know that the data will be corrupt and do
not start as primary DRBD.
Best Regards
Mia Lueng
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