Setting Node Type
When you create a node, Vertica automatically sets its type to PERMANENT
. This enables Vertica to use this node to store data. You can change a node's type with ALTER NODE
, to one of the following:
EPHEMERAL
: A node that is in transition from one type to another—typically, fromPERMANENT
to eitherSTANDBY
orEXECUTE
.STANDBY
: A node that is reserved to replace any node when it goes down. When used as a replacement node, Vertica changes its type toPERMANENT
. A standby node stores no segments or data until it is called to replace a down node. At that time, Vertica changes its type toPERMANENT
. For more information, see Active Standby Nodes.EXECUTE
: A node that is reserved for computation purposes only. An execute node contains no segments or data.