org.elasticsearch.cluster.metadata

Class IndexMetaData

java.lang.Object

org.elasticsearch.cluster.metadata.IndexMetaData

All Implemented Interfaces:

Diffable<IndexMetaData>, Writeable, ToXContent

public class IndexMetaData
extends java.lang.Object
implements Diffable<IndexMetaData>, ToXContent

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	IndexMetaData.Builder
static interface	IndexMetaData.Custom Deprecated.
static class	IndexMetaData.State

Nested classes/interfaces inherited from interface org.elasticsearch.common.io.stream.Writeable

Writeable.Reader<V>, Writeable.Writer<V>

Nested classes/interfaces inherited from interface org.elasticsearch.common.xcontent.ToXContent

ToXContent.DelegatingMapParams, ToXContent.MapParams, ToXContent.Params

Field Summary

Fields

Modifier and Type	Field and Description
static java.util.Map<java.lang.String,IndexMetaData.Custom>	customPrototypes
static MetaDataStateFormat<IndexMetaData>	FORMAT State format for IndexMetaData to write to and load from disk
static Setting<org.elasticsearch.cluster.metadata.AutoExpandReplicas>	INDEX_AUTO_EXPAND_REPLICAS_SETTING
static Setting<java.lang.Boolean>	INDEX_BLOCKS_METADATA_SETTING
static Setting<java.lang.Boolean>	INDEX_BLOCKS_READ_ONLY_ALLOW_DELETE_SETTING
static Setting<java.lang.Boolean>	INDEX_BLOCKS_READ_SETTING
static Setting<java.lang.Boolean>	INDEX_BLOCKS_WRITE_SETTING
static Setting<java.lang.String>	INDEX_DATA_PATH_SETTING
static Setting<java.lang.Integer>	INDEX_FORMAT_SETTING
static ClusterBlock	INDEX_METADATA_BLOCK
static Setting<java.lang.Integer>	INDEX_NUMBER_OF_REPLICAS_SETTING
static Setting<java.lang.Integer>	INDEX_NUMBER_OF_SHARDS_SETTING
static Setting<java.lang.Integer>	INDEX_PRIORITY_SETTING
static ClusterBlock	INDEX_READ_BLOCK
static ClusterBlock	INDEX_READ_ONLY_ALLOW_DELETE_BLOCK
static ClusterBlock	INDEX_READ_ONLY_BLOCK
static Setting<java.lang.Boolean>	INDEX_READ_ONLY_SETTING
static java.lang.String	INDEX_ROUTING_EXCLUDE_GROUP_PREFIX
static Setting<Settings>	INDEX_ROUTING_EXCLUDE_GROUP_SETTING
static java.lang.String	INDEX_ROUTING_INCLUDE_GROUP_PREFIX
static Setting<Settings>	INDEX_ROUTING_INCLUDE_GROUP_SETTING
static Setting<Settings>	INDEX_ROUTING_INITIAL_RECOVERY_GROUP_SETTING
static Setting<java.lang.Integer>	INDEX_ROUTING_PARTITION_SIZE_SETTING
static java.lang.String	INDEX_ROUTING_REQUIRE_GROUP_PREFIX
static Setting<Settings>	INDEX_ROUTING_REQUIRE_GROUP_SETTING
static java.lang.String	INDEX_SETTING_PREFIX
static Setting<java.lang.Boolean>	INDEX_SHADOW_REPLICAS_SETTING
static Setting<java.lang.Boolean>	INDEX_SHARED_FILESYSTEM_SETTING
static Setting<java.lang.Boolean>	INDEX_SHARED_FS_ALLOW_RECOVERY_ON_ANY_NODE_SETTING
static Setting<java.lang.String>	INDEX_SHRINK_SOURCE_NAME
static java.lang.String	INDEX_SHRINK_SOURCE_NAME_KEY
static Setting<java.lang.String>	INDEX_SHRINK_SOURCE_UUID
static java.lang.String	INDEX_SHRINK_SOURCE_UUID_KEY
static java.lang.String	INDEX_STATE_FILE_PREFIX
static java.lang.String	INDEX_UUID_NA_VALUE
static ClusterBlock	INDEX_WRITE_BLOCK
static java.lang.String	KEY_IN_SYNC_ALLOCATIONS
static java.lang.String	KEY_PRIMARY_TERMS
static java.lang.String	SETTING_AUTO_EXPAND_REPLICAS
static java.lang.String	SETTING_BLOCKS_METADATA
static java.lang.String	SETTING_BLOCKS_READ
static java.lang.String	SETTING_BLOCKS_WRITE
static java.lang.String	SETTING_CREATION_DATE
static java.lang.String	SETTING_CREATION_DATE_STRING
static java.lang.String	SETTING_DATA_PATH
static java.lang.String	SETTING_INDEX_PROVIDED_NAME The user provided name for an index.
static java.lang.String	SETTING_INDEX_UUID
static java.lang.String	SETTING_NUMBER_OF_REPLICAS
static java.lang.String	SETTING_NUMBER_OF_SHARDS
static java.lang.String	SETTING_PRIORITY
static java.lang.String	SETTING_READ_ONLY
static java.lang.String	SETTING_READ_ONLY_ALLOW_DELETE
static java.lang.String	SETTING_ROUTING_PARTITION_SIZE
static java.lang.String	SETTING_SHADOW_REPLICAS
static java.lang.String	SETTING_SHARED_FILESYSTEM
static java.lang.String	SETTING_SHARED_FS_ALLOW_RECOVERY_ON_ANY_NODE
static java.lang.String	SETTING_VERSION_CREATED
static java.lang.String	SETTING_VERSION_CREATED_STRING
static java.lang.String	SETTING_VERSION_UPGRADED
static java.lang.String	SETTING_VERSION_UPGRADED_STRING
static Setting<ActiveShardCount>	SETTING_WAIT_FOR_ACTIVE_SHARDS The number of active shard copies to check for before proceeding with a write operation.

Fields inherited from interface org.elasticsearch.common.xcontent.ToXContent

EMPTY_PARAMS

Method Summary

Modifier and Type	Method and Description
static Settings	addHumanReadableSettings(Settings settings) Adds human readable version and creation date settings.
static IndexMetaData.Builder	builder(IndexMetaData indexMetaData)
static IndexMetaData.Builder	builder(java.lang.String index)
<T extends IndexMetaData.Custom> T	custom(java.lang.String type)
Diff<IndexMetaData>	diff(IndexMetaData previousState) Returns serializable object representing differences between this and previousState
boolean	equals(java.lang.Object o)
DiscoveryNodeFilters	excludeFilters()
static IndexMetaData	fromXContent(XContentParser parser)
ImmutableOpenMap<java.lang.String,AliasMetaData>	getAliases()
long	getCreationDate()
Version	getCreationVersion() Return the Version on which this index has been created.
ImmutableOpenMap<java.lang.String,IndexMetaData.Custom>	getCustoms()
Index	getIndex()
java.lang.String	getIndexUUID()
DiscoveryNodeFilters	getInitialRecoveryFilters()
ImmutableOpenIntMap<java.util.Set<java.lang.String>>	getInSyncAllocationIds()
ImmutableOpenMap<java.lang.String,MappingMetaData>	getMappings()
Index	getMergeSourceIndex()
int	getNumberOfReplicas()
int	getNumberOfShards()
int	getRoutingFactor() Returns the routing factor for this index.
static int	getRoutingFactor(IndexMetaData sourceIndexMetadata, int targetNumberOfShards) Returns the routing factor for and shrunk index with the given number of target shards.
int	getRoutingNumShards() Returns the number of shards that should be used for routing.
int	getRoutingPartitionSize()
Settings	getSettings()
IndexMetaData.State	getState()
int	getTotalNumberOfShards()
Version	getUpgradedVersion() Return the Version on which this index has been upgraded.
long	getVersion()
ActiveShardCount	getWaitForActiveShards() Returns the configured SETTING_WAIT_FOR_ACTIVE_SHARDS, which defaults to an active shard count of 1 if not specified.
int	hashCode()
DiscoveryNodeFilters	includeFilters()
java.util.Set<java.lang.String>	inSyncAllocationIds(int shardId)
static boolean	isIndexUsingShadowReplicas(Settings settings) Returns true iff the given settings indicate that the index associated with these settings uses shadow replicas.
static boolean	isOnSharedFilesystem(Settings settings) Returns true iff the given settings indicate that the index associated with these settings allocates it's shards on a shared filesystem.
boolean	isRoutingPartitionedIndex()
boolean	isSameUUID(java.lang.String otherUUID) Test whether the current index UUID is the same as the given one.
static <T extends IndexMetaData.Custom> T	lookupPrototype(java.lang.String type)
static <T extends IndexMetaData.Custom> T	lookupPrototypeSafe(java.lang.String type)
MappingMetaData	mapping(java.lang.String mappingType)
MappingMetaData	mappingOrDefault(java.lang.String mappingType) Sometimes, the default mapping exists and an actual mapping is not created yet (introduced), in this case, we want to return the default mapping in case it has some default mapping definitions.
long	primaryTerm(int shardId) The term of the current selected primary.
static Diff<IndexMetaData>	readDiffFrom(StreamInput in)
static IndexMetaData	readFrom(StreamInput in)
static void	registerPrototype(java.lang.String type, IndexMetaData.Custom proto) Register a custom index meta data factory.
DiscoveryNodeFilters	requireFilters()
static java.util.Set<ShardId>	selectShrinkShards(int shardId, IndexMetaData sourceIndexMetadata, int numTargetShards) Returns the source shard ids to shrink into the given shard id.
XContentBuilder	toXContent(XContentBuilder builder, ToXContent.Params params)
void	writeTo(StreamOutput out) Write this into the StreamOutput.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.elasticsearch.common.xcontent.ToXContent

isFragment

Field Detail

customPrototypes

public static java.util.Map<java.lang.String,IndexMetaData.Custom> customPrototypes

INDEX_READ_ONLY_BLOCK

public static final ClusterBlock INDEX_READ_ONLY_BLOCK

INDEX_READ_BLOCK

public static final ClusterBlock INDEX_READ_BLOCK

INDEX_WRITE_BLOCK

public static final ClusterBlock INDEX_WRITE_BLOCK

INDEX_METADATA_BLOCK

public static final ClusterBlock INDEX_METADATA_BLOCK

INDEX_READ_ONLY_ALLOW_DELETE_BLOCK

public static final ClusterBlock INDEX_READ_ONLY_ALLOW_DELETE_BLOCK

INDEX_SETTING_PREFIX

public static final java.lang.String INDEX_SETTING_PREFIX

See Also:

Constant Field Values

SETTING_NUMBER_OF_SHARDS

public static final java.lang.String SETTING_NUMBER_OF_SHARDS

See Also:

Constant Field Values

INDEX_NUMBER_OF_SHARDS_SETTING

public static final Setting<java.lang.Integer> INDEX_NUMBER_OF_SHARDS_SETTING

SETTING_NUMBER_OF_REPLICAS

public static final java.lang.String SETTING_NUMBER_OF_REPLICAS

See Also:

Constant Field Values

INDEX_NUMBER_OF_REPLICAS_SETTING

public static final Setting<java.lang.Integer> INDEX_NUMBER_OF_REPLICAS_SETTING

SETTING_SHADOW_REPLICAS

public static final java.lang.String SETTING_SHADOW_REPLICAS

See Also:

Constant Field Values

INDEX_SHADOW_REPLICAS_SETTING

public static final Setting<java.lang.Boolean> INDEX_SHADOW_REPLICAS_SETTING

SETTING_ROUTING_PARTITION_SIZE

public static final java.lang.String SETTING_ROUTING_PARTITION_SIZE

See Also:

Constant Field Values

INDEX_ROUTING_PARTITION_SIZE_SETTING

public static final Setting<java.lang.Integer> INDEX_ROUTING_PARTITION_SIZE_SETTING

SETTING_SHARED_FILESYSTEM

public static final java.lang.String SETTING_SHARED_FILESYSTEM

See Also:

Constant Field Values

INDEX_SHARED_FILESYSTEM_SETTING

public static final Setting<java.lang.Boolean> INDEX_SHARED_FILESYSTEM_SETTING

SETTING_AUTO_EXPAND_REPLICAS

public static final java.lang.String SETTING_AUTO_EXPAND_REPLICAS

See Also:

Constant Field Values

INDEX_AUTO_EXPAND_REPLICAS_SETTING

public static final Setting<org.elasticsearch.cluster.metadata.AutoExpandReplicas> INDEX_AUTO_EXPAND_REPLICAS_SETTING

SETTING_READ_ONLY

public static final java.lang.String SETTING_READ_ONLY

See Also:

Constant Field Values

INDEX_READ_ONLY_SETTING

public static final Setting<java.lang.Boolean> INDEX_READ_ONLY_SETTING

SETTING_BLOCKS_READ

public static final java.lang.String SETTING_BLOCKS_READ

See Also:

Constant Field Values

INDEX_BLOCKS_READ_SETTING

public static final Setting<java.lang.Boolean> INDEX_BLOCKS_READ_SETTING

SETTING_BLOCKS_WRITE

public static final java.lang.String SETTING_BLOCKS_WRITE

See Also:

Constant Field Values

INDEX_BLOCKS_WRITE_SETTING

public static final Setting<java.lang.Boolean> INDEX_BLOCKS_WRITE_SETTING

SETTING_BLOCKS_METADATA

public static final java.lang.String SETTING_BLOCKS_METADATA

See Also:

Constant Field Values

INDEX_BLOCKS_METADATA_SETTING

public static final Setting<java.lang.Boolean> INDEX_BLOCKS_METADATA_SETTING

SETTING_READ_ONLY_ALLOW_DELETE

public static final java.lang.String SETTING_READ_ONLY_ALLOW_DELETE

See Also:

Constant Field Values

INDEX_BLOCKS_READ_ONLY_ALLOW_DELETE_SETTING

public static final Setting<java.lang.Boolean> INDEX_BLOCKS_READ_ONLY_ALLOW_DELETE_SETTING

SETTING_VERSION_CREATED

public static final java.lang.String SETTING_VERSION_CREATED

See Also:

Constant Field Values

SETTING_VERSION_CREATED_STRING

public static final java.lang.String SETTING_VERSION_CREATED_STRING

See Also:

Constant Field Values

SETTING_VERSION_UPGRADED

public static final java.lang.String SETTING_VERSION_UPGRADED

See Also:

Constant Field Values

SETTING_VERSION_UPGRADED_STRING

public static final java.lang.String SETTING_VERSION_UPGRADED_STRING

See Also:

Constant Field Values

SETTING_CREATION_DATE

public static final java.lang.String SETTING_CREATION_DATE

See Also:

Constant Field Values

SETTING_INDEX_PROVIDED_NAME

public static final java.lang.String SETTING_INDEX_PROVIDED_NAME

The user provided name for an index. This is the plain string provided by the user when the index was created. It might still contain date math expressions etc. (added in 5.0)

See Also:

Constant Field Values

SETTING_PRIORITY

public static final java.lang.String SETTING_PRIORITY

See Also:

Constant Field Values

INDEX_PRIORITY_SETTING

public static final Setting<java.lang.Integer> INDEX_PRIORITY_SETTING

SETTING_CREATION_DATE_STRING

public static final java.lang.String SETTING_CREATION_DATE_STRING

See Also:

Constant Field Values

SETTING_INDEX_UUID

public static final java.lang.String SETTING_INDEX_UUID

See Also:

Constant Field Values

SETTING_DATA_PATH

public static final java.lang.String SETTING_DATA_PATH

See Also:

Constant Field Values

INDEX_DATA_PATH_SETTING

public static final Setting<java.lang.String> INDEX_DATA_PATH_SETTING

SETTING_SHARED_FS_ALLOW_RECOVERY_ON_ANY_NODE

public static final java.lang.String SETTING_SHARED_FS_ALLOW_RECOVERY_ON_ANY_NODE

See Also:

Constant Field Values

INDEX_SHARED_FS_ALLOW_RECOVERY_ON_ANY_NODE_SETTING

public static final Setting<java.lang.Boolean> INDEX_SHARED_FS_ALLOW_RECOVERY_ON_ANY_NODE_SETTING

INDEX_UUID_NA_VALUE

public static final java.lang.String INDEX_UUID_NA_VALUE

See Also:

Constant Field Values

INDEX_ROUTING_REQUIRE_GROUP_PREFIX

public static final java.lang.String INDEX_ROUTING_REQUIRE_GROUP_PREFIX

See Also:

Constant Field Values

INDEX_ROUTING_INCLUDE_GROUP_PREFIX

public static final java.lang.String INDEX_ROUTING_INCLUDE_GROUP_PREFIX

See Also:

Constant Field Values

INDEX_ROUTING_EXCLUDE_GROUP_PREFIX

public static final java.lang.String INDEX_ROUTING_EXCLUDE_GROUP_PREFIX

See Also:

Constant Field Values

INDEX_ROUTING_REQUIRE_GROUP_SETTING

public static final Setting<Settings> INDEX_ROUTING_REQUIRE_GROUP_SETTING

INDEX_ROUTING_INCLUDE_GROUP_SETTING

public static final Setting<Settings> INDEX_ROUTING_INCLUDE_GROUP_SETTING

INDEX_ROUTING_EXCLUDE_GROUP_SETTING

public static final Setting<Settings> INDEX_ROUTING_EXCLUDE_GROUP_SETTING

INDEX_ROUTING_INITIAL_RECOVERY_GROUP_SETTING

public static final Setting<Settings> INDEX_ROUTING_INITIAL_RECOVERY_GROUP_SETTING

SETTING_WAIT_FOR_ACTIVE_SHARDS

public static final Setting<ActiveShardCount> SETTING_WAIT_FOR_ACTIVE_SHARDS

The number of active shard copies to check for before proceeding with a write operation.

INDEX_FORMAT_SETTING

public static final Setting<java.lang.Integer> INDEX_FORMAT_SETTING

KEY_IN_SYNC_ALLOCATIONS

public static final java.lang.String KEY_IN_SYNC_ALLOCATIONS

See Also:

Constant Field Values

KEY_PRIMARY_TERMS

public static final java.lang.String KEY_PRIMARY_TERMS

See Also:

Constant Field Values

INDEX_STATE_FILE_PREFIX

public static final java.lang.String INDEX_STATE_FILE_PREFIX

See Also:

Constant Field Values

INDEX_SHRINK_SOURCE_UUID_KEY

public static final java.lang.String INDEX_SHRINK_SOURCE_UUID_KEY

See Also:

Constant Field Values

INDEX_SHRINK_SOURCE_NAME_KEY

public static final java.lang.String INDEX_SHRINK_SOURCE_NAME_KEY

See Also:

Constant Field Values

INDEX_SHRINK_SOURCE_UUID

public static final Setting<java.lang.String> INDEX_SHRINK_SOURCE_UUID

INDEX_SHRINK_SOURCE_NAME

public static final Setting<java.lang.String> INDEX_SHRINK_SOURCE_NAME

FORMAT

public static final MetaDataStateFormat<IndexMetaData> FORMAT

State format for IndexMetaData to write to and load from disk

Method Detail

registerPrototype

public static void registerPrototype(java.lang.String type,
                                     IndexMetaData.Custom proto)

Register a custom index meta data factory. Make sure to call it from a static block.

lookupPrototype

@Nullable
public static <T extends IndexMetaData.Custom> T lookupPrototype(java.lang.String type)

lookupPrototypeSafe

public static <T extends IndexMetaData.Custom> T lookupPrototypeSafe(java.lang.String type)

getIndex

public Index getIndex()

getIndexUUID

public java.lang.String getIndexUUID()

isSameUUID

public boolean isSameUUID(java.lang.String otherUUID)

Test whether the current index UUID is the same as the given one. Returns true if either are _na_

getVersion

public long getVersion()

primaryTerm

public long primaryTerm(int shardId)

The term of the current selected primary. This is a non-negative number incremented when a primary shard is assigned after a full cluster restart or a replica shard is promoted to a primary. Note: since we increment the term every time a shard is assigned, the term for any operational shard (i.e., a shard that can be indexed into) is larger than 0. See IndexMetaDataUpdater.applyChanges(org.elasticsearch.cluster.metadata.MetaData, org.elasticsearch.cluster.routing.RoutingTable).

getCreationVersion

public Version getCreationVersion()

Return the Version on which this index has been created. This information is typically useful for backward compatibility.

getUpgradedVersion

public Version getUpgradedVersion()

Return the Version on which this index has been upgraded. This information is typically useful for backward compatibility.

getCreationDate

public long getCreationDate()

getState

public IndexMetaData.State getState()

getNumberOfShards

public int getNumberOfShards()

getNumberOfReplicas

public int getNumberOfReplicas()

getRoutingPartitionSize

public int getRoutingPartitionSize()

isRoutingPartitionedIndex

public boolean isRoutingPartitionedIndex()

getTotalNumberOfShards

public int getTotalNumberOfShards()

getWaitForActiveShards

public ActiveShardCount getWaitForActiveShards()

Returns the configured SETTING_WAIT_FOR_ACTIVE_SHARDS, which defaults to an active shard count of 1 if not specified.

getSettings

public Settings getSettings()

getAliases

public ImmutableOpenMap<java.lang.String,AliasMetaData> getAliases()

getMappings

public ImmutableOpenMap<java.lang.String,MappingMetaData> getMappings()

mapping

@Nullable
public MappingMetaData mapping(java.lang.String mappingType)

getMergeSourceIndex

public Index getMergeSourceIndex()

mappingOrDefault

@Nullable
public MappingMetaData mappingOrDefault(java.lang.String mappingType)

Sometimes, the default mapping exists and an actual mapping is not created yet (introduced), in this case, we want to return the default mapping in case it has some default mapping definitions.

Note, once the mapping type is introduced, the default mapping is applied on the actual typed MappingMetaData, setting its routing, timestamp, and so on if needed.

getCustoms

public ImmutableOpenMap<java.lang.String,IndexMetaData.Custom> getCustoms()

custom

public <T extends IndexMetaData.Custom> T custom(java.lang.String type)

getInSyncAllocationIds

public ImmutableOpenIntMap<java.util.Set<java.lang.String>> getInSyncAllocationIds()

inSyncAllocationIds

public java.util.Set<java.lang.String> inSyncAllocationIds(int shardId)

requireFilters

@Nullable
public DiscoveryNodeFilters requireFilters()

getInitialRecoveryFilters

@Nullable
public DiscoveryNodeFilters getInitialRecoveryFilters()

includeFilters

@Nullable
public DiscoveryNodeFilters includeFilters()

excludeFilters

@Nullable
public DiscoveryNodeFilters excludeFilters()

equals

public boolean equals(java.lang.Object o)

Overrides:

equals in class java.lang.Object

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object

diff

public Diff<IndexMetaData> diff(IndexMetaData previousState)

Description copied from interface: Diffable

Returns serializable object representing differences between this and previousState

Specified by:

diff in interface Diffable<IndexMetaData>

readDiffFrom

public static Diff<IndexMetaData> readDiffFrom(StreamInput in)
                                        throws java.io.IOException

Throws:

java.io.IOException

fromXContent

public static IndexMetaData fromXContent(XContentParser parser)
                                  throws java.io.IOException

Throws:

java.io.IOException

toXContent

public XContentBuilder toXContent(XContentBuilder builder,
                                  ToXContent.Params params)
                           throws java.io.IOException

Specified by:

toXContent in interface ToXContent

Throws:

java.io.IOException

readFrom

public static IndexMetaData readFrom(StreamInput in)
                              throws java.io.IOException

Throws:

java.io.IOException

writeTo

public void writeTo(StreamOutput out)
             throws java.io.IOException

Description copied from interface: Writeable

Write this into the StreamOutput.

Specified by:

writeTo in interface Writeable

Throws:

java.io.IOException

builder

public static IndexMetaData.Builder builder(java.lang.String index)

builder

public static IndexMetaData.Builder builder(IndexMetaData indexMetaData)

isOnSharedFilesystem

public static boolean isOnSharedFilesystem(Settings settings)

Returns true iff the given settings indicate that the index associated with these settings allocates it's shards on a shared filesystem. Otherwise false. The default setting for this is the returned value from isIndexUsingShadowReplicas(org.elasticsearch.common.settings.Settings).

isIndexUsingShadowReplicas

public static boolean isIndexUsingShadowReplicas(Settings settings)

Returns true iff the given settings indicate that the index associated with these settings uses shadow replicas. Otherwise false. The default setting for this is false.

addHumanReadableSettings

public static Settings addHumanReadableSettings(Settings settings)

Adds human readable version and creation date settings. This method is used to display the settings in a human readable format in REST API

getRoutingNumShards

public int getRoutingNumShards()

Returns the number of shards that should be used for routing. This basically defines the hash space we use in OperationRouting.generateShardId(IndexMetaData, String, String) to route documents to shards based on their ID or their specific routing value. The default value is getNumberOfShards(). This value only changes if and index is shrunk.

getRoutingFactor

public int getRoutingFactor()

Returns the routing factor for this index. The default is 1.

See Also:

for details

selectShrinkShards

public static java.util.Set<ShardId> selectShrinkShards(int shardId,
                                                        IndexMetaData sourceIndexMetadata,
                                                        int numTargetShards)

Returns the source shard ids to shrink into the given shard id.

Parameters:

shardId - the id of the target shard to shrink to

sourceIndexMetadata - the source index metadata

numTargetShards - the total number of shards in the target index

Returns:

a set of shard IDs to shrink into the given shard ID.

getRoutingFactor

public static int getRoutingFactor(IndexMetaData sourceIndexMetadata,
                                   int targetNumberOfShards)

Returns the routing factor for and shrunk index with the given number of target shards. This factor is used in the hash function in OperationRouting.generateShardId(IndexMetaData, String, String) to guarantee consistent hashing / routing of documents even if the number of shards changed (ie. a shrunk index).

Parameters:

sourceIndexMetadata - the metadata of the source index

targetNumberOfShards - the total number of shards in the target index

Returns:

the routing factor for and shrunk index with the given number of target shards.

Throws:

java.lang.IllegalArgumentException - if the number of source shards is greater than the number of target shards or if the source shards are not divisible by the number of target shards.