75 ways to demystify DB2: #29: Techtip : What is a tiebreaker in DB2 HA (High Availability)?
DougRK 310000EQT1 Visits (9700)
Rocks, Paper, Scissors?
Heads or Tail?
Good guess's but none of the above.
A tiebreaker is a object used in a DB2 HA (High Availability) cluster environment comprised of even number of nodes.
In such a cluster environment, when both nodes cannot communicate with each other, the tiebreaker is used by both nodes to see which node is still active and can continue to host cluster resources. This in essence, is "breaking a tie", hence, a tiebreaker.
There are three types of tiebreakers that can be used with DB2 HA, network, disk and cloud.
Stay tuned to this blog for a forth-coming discussion on the three types of tiebreakers next.