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Displaying posts with tag: arbitration (reset)

MySQL Cluster on two hosts - options and implications
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Considering that you have the following hosts and MySQL Cluster deployed in the following ways:

A: ndb_mgmd, ndbd , mysqld
B: ndb_mgmd, ndbd , mysqld

Now you have a couple of options on how to handle potential network partitioning/split brain which could occur if the computer A and B lose contact with each other. Let's see the implications of these options.

Option 1: ArbitrationRank=1, no NIC bonding
  • If ndb_mgmd on A is elected as the arbitrator and host A crashes, then data node on host B will also die (cannot reach arbitrator).
  • If ndb_mgmd on A is elected as the arbitrator and host B lose contact with host A, then the data node on B will shut down since it can't reach the arbitrator. For further discussions, call this situation X.
  • If you are in situation X and if you restart data node on B and you








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