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Re: Regarding cluster config for mysql-5.1.30 ndb-6.3.20
Posted by: Matthew Montgomery
Date: September 21, 2009 02:52PM

You need a minimum of 3 physical nodes for HA. SQL and NDBD nodes can co-exist, SQL and NDB_MGMD nodes can co-exist but NDB_MGMD and NDBD nodes must not reside on the same hardware.

A partitioned cluster is formed when there is a interruption or saturation of the network between these two nodes. In this situation both sides believe they are able for form a surviving cluster. One of the surviving clusters should be shutdown to avoid it diverging from the other. This case requires an arbitrator to decide. If the host serving the elected arbitrator and an ndbd node is down the remaining node(s) will not be able to contact the arbitrator and will also shutdown.

See previous discussion about arbitration and split-brain handling.

http://forums.mysql.com/read.php?25,281038,281368#msg-281368

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Re: Regarding cluster config for mysql-5.1.30 ndb-6.3.20
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