ALTER_LOCATION_SIZE

Eon Mode only

Resizes the depot on one node, all nodes in a subcluster, or all nodes in the database.

This is a meta-function. You must call meta-functions in a top-level SELECT statement.

Behavior type

Syntax

ALTER_LOCATION_SIZE( 'location', '[target]', 'size')

Parameters

location

Specifies the location to resize, one of the following:

• depot: Resizes the node's current depot.

• The depot's absolute path in the Linux filesystem. If you change the depot size on multiple nodes and specify a path, the path must be identical on all affected nodes . By default, this is not the case, as the node's name is typically this path. For example, the default depot path for node 1 in the verticadb database is /vertica/data/verticadb/v_verticadb_node0001_depot.

target

The node or nodes on which to change the depot, one of the following:

• Node name: Resize the specified node.

• Subcluster name: Resize depots of all nodes in the specified subcluster.

• Empty string: Resize all depots in the database.

size

Valid only if the storage location usage type is set to DEPOT, specifies the maximum amount of disk space that the depot can allocate from the storage location's file system.

You can specify size in two ways:

• integer%: Percentage of storage location disk size.

• integer{K|M|G|T}: Amount of storage location disk size in kilobytes, megabytes, gigabytes, or terabytes.

Important

The depot size cannot exceed 80 percent of the file system disk space where the depot is stored. If you specify a value that is too large, Vertica issues a warning and automatically changes the value to 80 percent of the file system size.

Privileges

Examples

Increase depot size on all nodes to 80 percent of file system:

=> SELECT node_name, location_label, location_path, max_size, disk_percent FROM storage_locations WHERE location_usage = 'DEPOT' ORDER BY node_name;
    node_name     | location_label  |      location_path      |  max_size   | disk_percent
------------------+-----------------+-------------------------+-------------+--------------
 v_vmart_node0001 | auto-data-depot | /home/dbadmin/verticadb | 36060108800 | 70%
 v_vmart_node0002 | auto-data-depot | /home/dbadmin/verticadb | 36059377664 | 70%
 v_vmart_node0003 | auto-data-depot | /home/dbadmin/verticadb | 36060108800 | 70%
(3 rows)

=> SELECT alter_location_size('depot', '','80%');
 alter_location_size
---------------------
 depotSize changed.
(1 row)

=> SELECT node_name, location_label, location_path, max_size, disk_percent FROM storage_locations WHERE location_usage = 'DEPOT' ORDER BY node_name;
    node_name     | location_label  |      location_path      |  max_size   | disk_percent
------------------+-----------------+-------------------------+-------------+--------------
 v_vmart_node0001 | auto-data-depot | /home/dbadmin/verticadb | 41211552768 | 80%
 v_vmart_node0002 | auto-data-depot | /home/dbadmin/verticadb | 41210717184 | 80%
 v_vmart_node0003 | auto-data-depot | /home/dbadmin/verticadb | 41211552768 | 80%
(3 rows)

Change the depot size to 75% of the filesystem size for all nodes in the analytics subcluster:

=> SELECT subcluster_name, subclusters.node_name, storage_locations.max_size, storage_locations.disk_percent FROM subclusters INNER JOIN storage_locations ON subclusters.node_name = storage_locations.node_name WHERE storage_locations.location_usage='DEPOT';
  subcluster_name   |      node_name       |   max_size  | disk_percent
--------------------+----------------------+----------------------------
 default_subcluster | v_verticadb_node0001 | 25264737485 | 60%
 default_subcluster | v_verticadb_node0002 | 25264737485 | 60%
 default_subcluster | v_verticadb_node0003 | 25264737485 | 60%
 analytics          | v_verticadb_node0004 | 25264737485 | 60%
 analytics          | v_verticadb_node0005 | 25264737485 | 60%
 analytics          | v_verticadb_node0006 | 25264737485 | 60%
 analytics          | v_verticadb_node0007 | 25264737485 | 60%
 analytics          | v_verticadb_node0008 | 25264737485 | 60%
 analytics          | v_verticadb_node0009 | 25264737485 | 60%
(9 rows)

=> SELECT ALTER_LOCATION_SIZE('depot','analytics','75%');
 ALTER_LOCATION_SIZE
---------------------
 depotSize changed.
(1 row)

=> SELECT subcluster_name, subclusters.node_name, storage_locations.max_size, storage_locations.disk_percent FROM subclusters INNER JOIN storage_locations ON subclusters.node_name = storage_locations.node_name WHERE storage_locations.location_usage='DEPOT';
  subcluster_name   |      node_name       |   max_size  | disk_percent
--------------------+----------------------+----------------------------
 default_subcluster | v_verticadb_node0001 | 25264737485 | 60%
 default_subcluster | v_verticadb_node0002 | 25264737485 | 60%
 default_subcluster | v_verticadb_node0003 | 25264737485 | 60%
 analytics          | v_verticadb_node0004 | 31580921856 | 75%
 analytics          | v_verticadb_node0005 | 31580921856 | 75%
 analytics          | v_verticadb_node0006 | 31580921856 | 75%
 analytics          | v_verticadb_node0007 | 31580921856 | 75%
 analytics          | v_verticadb_node0008 | 31580921856 | 75%
 analytics          | v_verticadb_node0009 | 31580921856 | 75%
(9 rows)

See also