Filtering the List of Nodes

The filter lets you build search expressions to provide sophisticated filtering capabilities for locating specific data on views that display a large number of nodes. Expressions are implicitly connected by the AND operator.

Filtering the Node List in the MapR Control System

  1. Log in to MCS and click Nodes to filter the list of nodes in the Nodes pane.
  2. Click and select one of the following from the Add Filter dropdown menu.
    • Health — to filter the list by node health
    • Hostname — to filter the list by hostname of node
    • Physical IP — to filter the list by IP address of node
    • Last FS Heartbeat — to filter the list by number of heartbeats sent to FS
    • CPU Utilized — to filter the list by number of cores utilized
    • Physical Topology — to filter the list by rack path
    • Configured Services — to filter the list by configured services
    • Memory Used — to filter the list by amount of memory used
    • Running Services — to filter the list by installed services
    • Used Disk Space — to filter the list by amount of disk space used
    • Virtual IP — to filter the list by virtual IP address
  3. Specify the value in the dropdown field for the selected filter (to filter the list of nodes by) and click Filter.

    As you make selections and specify the filtering criteria, the pane displays only the nodes that match the specified filtering criteria.

  4. Click:
    • Add Filter to add another filtering criteria.
    • to remove a filtering criteria.
    • to clear all filter settings.

Filtering the List Using the CLI

The node list command can be used with the -filter option, which let you specify large numbers of nodes by matching specified values in specified fields rather than by typing each name explicitly. For example, you can retrieve all nodes on a specific subnet as follows:

maprcli volume list -filter [ip==20.30.40.*]

For more information, see Filters.