com.gpudb.protocol

Class AdminRebalanceRequest.Options

java.lang.Object

com.gpudb.protocol.AdminRebalanceRequest.Options

Enclosing class:

AdminRebalanceRequest

public static final class AdminRebalanceRequest.Options
extends Object

Optional parameters.

• REBALANCE_SHARDED_DATA: If true, sharded data will be rebalanced approximately equally across the cluster. Note that for big clusters, this data transfer could be time consuming and result in delayed query responses. Supported values:
  • TRUE
  • FALSE
  The default value is TRUE.
• REBALANCE_UNSHARDED_DATA: If true, unsharded data (data without primary keys and without shard keys) will be rebalanced approximately equally across the cluster. Note that for big clusters, this data transfer could be time consuming and result in delayed query responses. Supported values:
  • TRUE
  • FALSE
  The default value is TRUE.
• TABLE_WHITELIST: Comma-separated list of unsharded table names to rebalance. Not applicable to sharded tables because they are always balanced in accordance with their primary key or shard key. Cannot be used simultaneously with table_blacklist.
• TABLE_BLACKLIST: Comma-separated list of unsharded table names to not rebalance. Not applicable to sharded tables because they are always balanced in accordance with their primary key or shard key. Cannot be used simultaneously with table_whitelist.
• AGGRESSIVENESS: Influences how much data to send per rebalance round. A higher aggressiveness setting will complete the rebalance faster. A lower aggressiveness setting will take longer, but allow for better interleaving between the rebalance and other queries. Allowed values are 1 through 10. The default value is '1'.
• COMPACT_AFTER_REBALANCE: Perform compaction of deleted records once the rebalance completes, to reclaim memory and disk space. Default is true, unless repair_incorrectly_sharded_data is set to true. Supported values:
  • TRUE
  • FALSE
  The default value is TRUE.
• COMPACT_ONLY: Only perform compaction, do not rebalance. Default is false. Supported values:
  • TRUE
  • FALSE
  The default value is FALSE.
• REPAIR_INCORRECTLY_SHARDED_DATA: Scans for any data sharded incorrectly and re-routes the correct location. This can be done as part of a typical rebalance after expanding the cluster, or in a standalone fashion when it is believed that data is sharded incorrectly somewhere in the cluster. Compaction will not be performed by default when this is enabled. This option may also lengthen rebalance time, and increase the memory used by the rebalance. Supported values:
  • TRUE
  • FALSE
  The default value is FALSE.

The default value is an empty Map. A set of string constants for the parameter options.

Field Summary

Fields

Modifier and Type	Field and Description
static String	AGGRESSIVENESS Influences how much data to send per rebalance round.
static String	COMPACT_AFTER_REBALANCE Perform compaction of deleted records once the rebalance completes, to reclaim memory and disk space.
static String	COMPACT_ONLY Only perform compaction, do not rebalance.
static String	FALSE
static String	REBALANCE_SHARDED_DATA If true, sharded data will be rebalanced approximately equally across the cluster.
static String	REBALANCE_UNSHARDED_DATA If true, unsharded data (data without primary keys and without shard keys) will be rebalanced approximately equally across the cluster.
static String	REPAIR_INCORRECTLY_SHARDED_DATA Scans for any data sharded incorrectly and re-routes the correct location.
static String	TABLE_BLACKLIST Comma-separated list of unsharded table names to not rebalance.
static String	TABLE_WHITELIST Comma-separated list of unsharded table names to rebalance.
static String	TRUE

Method Summary

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

REBALANCE_SHARDED_DATA

public static final String REBALANCE_SHARDED_DATA

If true, sharded data will be rebalanced approximately equally across the cluster. Note that for big clusters, this data transfer could be time consuming and result in delayed query responses. Supported values:

• TRUE
• FALSE

The default value is TRUE.

See Also:

Constant Field Values

TRUE

public static final String TRUE

See Also:

Constant Field Values

FALSE

public static final String FALSE

See Also:

Constant Field Values

REBALANCE_UNSHARDED_DATA

public static final String REBALANCE_UNSHARDED_DATA

If true, unsharded data (data without primary keys and without shard keys) will be rebalanced approximately equally across the cluster. Note that for big clusters, this data transfer could be time consuming and result in delayed query responses. Supported values:

• TRUE
• FALSE

The default value is TRUE.

See Also:

Constant Field Values

TABLE_WHITELIST

public static final String TABLE_WHITELIST

Comma-separated list of unsharded table names to rebalance. Not applicable to sharded tables because they are always balanced in accordance with their primary key or shard key. Cannot be used simultaneously with table_blacklist.

See Also:

Constant Field Values

TABLE_BLACKLIST

public static final String TABLE_BLACKLIST

Comma-separated list of unsharded table names to not rebalance. Not applicable to sharded tables because they are always balanced in accordance with their primary key or shard key. Cannot be used simultaneously with table_whitelist.

See Also:

Constant Field Values

AGGRESSIVENESS

public static final String AGGRESSIVENESS

Influences how much data to send per rebalance round. A higher aggressiveness setting will complete the rebalance faster. A lower aggressiveness setting will take longer, but allow for better interleaving between the rebalance and other queries. Allowed values are 1 through 10. The default value is '1'.

See Also:

Constant Field Values

COMPACT_AFTER_REBALANCE

public static final String COMPACT_AFTER_REBALANCE

Perform compaction of deleted records once the rebalance completes, to reclaim memory and disk space. Default is true, unless repair_incorrectly_sharded_data is set to true. Supported values:

• TRUE
• FALSE

The default value is TRUE.

See Also:

Constant Field Values

COMPACT_ONLY

public static final String COMPACT_ONLY

Only perform compaction, do not rebalance. Default is false. Supported values:

• TRUE
• FALSE

The default value is FALSE.

See Also:

Constant Field Values

REPAIR_INCORRECTLY_SHARDED_DATA

public static final String REPAIR_INCORRECTLY_SHARDED_DATA

Scans for any data sharded incorrectly and re-routes the correct location. This can be done as part of a typical rebalance after expanding the cluster, or in a standalone fashion when it is believed that data is sharded incorrectly somewhere in the cluster. Compaction will not be performed by default when this is enabled. This option may also lengthen rebalance time, and increase the memory used by the rebalance. Supported values:

• TRUE
• FALSE

The default value is FALSE.

See Also:

Constant Field Values