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Mapr Vertica DR failover

HI All:

 

This is what we need to achieved.

 

  • 6 nodes production, 6 nodes DR
  • Production: n001 …n006,   DR d001…d006  (production and DR has different IPs)
  • Vertica data “/vertica” hosted on mapr FS
  • /vertica mirrored from production to DR
  • Production Vertica is Up and Dr Vertica is standby (not running)
  • In DR situation.  Mirrored volume on DR site will be promoted from read-only to read/write
  • Since IP is different on Production and DR, Vertica will not start up without modification
  • Due to lacking of official procedure and best practice. I have come up with the follow procedure and tested it work.

 

Procedure to up an DR node from mirror data volume

  • Edit admintool.conf on each DR notes (replace hostname and IP for new nodes on DR clusther)
  • Edit config.cat  for each database on each DR notes (replace hostname and IP for new nodes on DR clusther)
  • Edit all files in Txnlog dir (replace hostname and IP for new nodes on DR clusther)
  • Start vertica (notes, config.cat will be reverted back automatically on vertica startup)
  • Down 1 node at a time (until all nodes are done)
    • Run “alter node” to change node IP  of the down node
    • Restart the down node.

 

Will this be a recommended way to proceed?

 

 

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