--- title: Leader Based Replication Synchronization Provider description: The Leader Based Replication Synchronization Provider provides leader based eventually consistent replication of data across multiple directory server instances. component: pingds version: 8 page_id: pingds:configref:objects-leader-based-replication-synchronization-provider canonical_url: https://docs.pingidentity.com/pingds/8.1/configref/objects-leader-based-replication-synchronization-provider.html llms_txt: https://docs.pingidentity.com/pingds/llms.txt docs_for_agents: https://developer.pingidentity.com/build-with-ai/docs-for-agents.md superseded_by: https://docs.pingidentity.com/pingds/8.1/configref/objects-leader-based-replication-synchronization-provider.html section_ids: parent: Parent leader_based_replication_synchronization_provider_properties: Leader Based Replication Synchronization Provider properties basic_properties: Basic properties bootstrap-replication-server: bootstrap-replication-server enabled: enabled replication-purge-delay: replication-purge-delay advanced_properties: Advanced properties java-class: java-class solve-conflicts: solve-conflicts --- # Leader Based Replication Synchronization Provider The Leader Based Replication Synchronization Provider provides leader based eventually consistent replication of data across multiple directory server instances. ## Parent The Leader Based Replication Synchronization Provider object inherits from [Synchronization Provider](objects-synchronization-provider.html). ## Leader Based Replication Synchronization Provider properties You can use configuration expressions to set property values at startup time. For details, see [Property value substitution](expressions.html). | Basic Properties | Advanced Properties | | ------------------------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------- | | [bootstrap-replication-server](#bootstrap-replication-server) [enabled](#enabled) [replication-purge-delay](#replication-purge-delay) | [java-class](#java-class) [solve-conflicts](#solve-conflicts) | ### Basic properties Use the `--advanced` option to access advanced properties. ### bootstrap-replication-server | | | | ----------------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | *Synopsis* | The addresses of one or more replication servers within the topology which this server should connect to in order to discover the rest of the topology. | | *Description* | Addresses must be specified using the replication port of the remote replication servers using the syntax "hostname:repl-port". When using an IPv6 address as the hostname, put brackets around the address as in "\[IPv6Address]:repl-port". | | *Default value* | Adding a replication server or a replication domain requires this to be filled. | | *Allowed values* | A host name or an IP address followed by a ":" and a port number.Port number must be greater than 1 and less than 65535. | | *Multi-valued* | Yes | | *Required* | No | | *Admin action required* | None | | *Advanced* | No | | *Read-only* | No | ### enabled | | | | ----------------------- | ------------------------------------------------------------------ | | *Synopsis* | Indicates whether the Synchronization Provider is enabled for use. | | *Default value* | None | | *Allowed values* | truefalse | | *Multi-valued* | No | | *Required* | Yes | | *Admin action required* | None | | *Advanced* | No | | *Read-only* | No | ### replication-purge-delay | | | | ----------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | *Synopsis* | Minimum lifetime of changelog data and old replication meta-data in directory entries. Changelog data and replication meta-data older than this setting is eligible to be removed. | | *Description* | After the purge delay has passed, the server removes old changelog data over time when it applies new updates. Replication meta-data is stored in changed directory entries. The server removes old replication meta-data either when the entry is next modified, or by a dedicated purge task, whichever happens first. The server temporarily stops removing old data when it has been unable to process updates for an extended period of time. For example, the server stops removing data when the server is offline, and when it cannot access other servers due to a network partition. Once old data is removed, the server can no longer use it for replication. Changelog and replication meta-data older than the purge delay must therefore be considered stale. Backups must be newer than the purge delay, including the time it takes to restore a backup. | | *Default value* | 3 days | | *Allowed values* | Uses [duration syntax](duration-syntax.html).Lower limit: 0 seconds. | | *Multi-valued* | No | | *Required* | No | | *Admin action required* | None | | *Advanced* | No | | *Read-only* | No | ## Advanced properties Use the `--advanced` option to access advanced properties. ### java-class | | | | ----------------------- | ---------------------------------------------------------------------------------------------------------------------------------------- | | *Synopsis* | Specifies the fully-qualified name of the Java class that provides the Leader Based Replication Synchronization Provider implementation. | | *Default value* | org.forgerock.opendj.server.leaderbasedreplication.LeaderBasedReplicationSynchronizationProvider; | | *Allowed values* | A Java class that extends or implements:- org.opends.server.api.SynchronizationProvider | | *Multi-valued* | No | | *Required* | Yes | | *Admin action required* | None | | *Advanced* | Yes | | *Read-only* | No | ### solve-conflicts | | | | ----------------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | *Synopsis* | Indicates if this server solves conflict. | | *Description* | This boolean indicates if this domain keeps the historical meta-data necessary to solve conflicts. When set to false the server will not maintain historical meta-data and will therefore not be able to solve conflict. This should therefore be done only if the replication is used in a single master type of deployment. | | *Default value* | true | | *Allowed values* | truefalse | | *Multi-valued* | No | | *Required* | No | | *Admin action required* | None | | *Advanced* | Yes | | *Read-only* | No |