Appliance Shutdown Procedure

Rupert Harwood -

The proper procedure to shut down a Clustrix Appliance node is as follows:

  • shutdown node with "shutdown -h now".
  • remove cables from node and remove node from rack
  • move rails
  • re-plug node in to infiniband and ethernet
  • re-plug node into power
  • power node on
  • wait for node to re-join cluster and full protection restored for all data alert to be sent
  • repeat

Note that shutting down the node and powering the node back on will both result in a group change.

By default the cluster will wait for 10 minutes before reprotecting around a removed node. If you are planning on re-incorporating the node you should endeavor to have the node back online before this time expires. If you need more than 10 minutes you can change this with a global variable.

The global variable that defines how long the cluster waits for a node to come back before it starts the reprotection process is: rebalancer_reprotect_queue_interval. This is by default set to 600 seconds (10 minutes).

If you want to change this, you can do this with:

set global rebalancer_reprotect_queue_interval=1200;

or some other value in seconds.

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