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XQuery tieredstorage:forest-migrate

MarkLogic Server 11.0 Product Documentation
tieredstorage.forestMigrate

tieredstorage.forestMigrate(
   forest-ids as (Number|String)[],
   [new-host-id as (Number|String)?],
   [new-data-directory as String?],
   [new-large-data-directory as String?],
   [new-fast-data-directory as String?],
   [options as String[]]
) as null

Summary

This function moves data in a forest to new data directories and optionally sets new host for the forest. If no data directory is specified, the default data directory will be used. For details, see Migrating Forests and Partitions in the Administrator's Guide.

Parameters
forest-ids IDs of the forests to migrate.
new-host-id ID of the destination host.
new-data-directory The optional data directory of the forest. If no directory is specified, then it will be a private forest.
new-large-data-directory The optional directory where large objects are stored. If no directory is specified, then large objects will be stored in DATA_DIR/Forests/FOREST_NAME/Large.
new-fast-data-directory The optional directory for the fast data directory for this forest. The fast data directory is typically located on a fast storage device, such as an SSD.
options Valid option values include: 
timeout=N
Specifies the number of seconds to wait for a forest to re-open after a configuration is made during the migration operation. 
local-to-local
Indicates that the migration is between local storage to local storage. This is the default when no other direction parameter is specified and the type of storage cannot be derived from either the data directory path. 
local-to-shared
Indicates that the migration is between local storage and shared storage. This type of migration supports changing the host. 
shared-to-local
Indicates that the migration is to move data from shared storage to local storage. This type of migration supports changing the host. 
shared-to-shared
Indicates that the migration is to move data from shared storage to shared storage. This type of migration supports changing the host.

Example

// Moves the Forest1 from its current location to /tmp/test and sets their 
// timeouts to 20 seconds. 

const ts = require('/MarkLogic/tieredstorage');

ts.forestMigrate(
    xdmp.forest('Forest1'), 
    xdmp.host('host1'), 
    '/tmp/test', 
    null, 
    null, 
    ['timeout=20']);

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