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Explain which nodes participate in master election 

This commit updates the Zen Discovery documentation to explain which
nodes partcipate in master election (by default) as well as the
configuration parameters for controlling this.

Closes #12727
This commit is contained in:
Jason Tedor 2015-08-07 11:30:36 -04:00
parent 40cd460647
commit c9d4d40169
1 changed files with 6 additions and 0 deletions
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6
docs/reference/modules/discovery/zen.asciidoc
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@ -82,6 +82,12 @@ serves as a protection against (partial) network failures where node may unjustl
think that the master has failed. In this case the node will simply hear from
other nodes about the currently active master.
If `discovery.zen.master_election.filter_client` is `true`, pings from client nodes (nodes where `node.client` is
`true`, or both `node.data` and `node.master` are `false`) are ignored during master election; the default value is
`true`. If `discovery.zen.master_election.filter_data` is `true`, pings from non-master-eligible data nodes (nodes
where `node.data` is `true` and `node.master` is `false`) are ignored during master election; the default value is
`false`. Pings from master-eligible nodes are always observed during master election.
Nodes can be excluded from becoming a master by setting `node.master` to
`false`. Note, once a node is a client node (`node.client` set to
`true`), it will not be allowed to become a master (`node.master` is