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Sun OpenDS Standard Edition 2.2 Administration Guide |
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Starting and Stopping Your Server Instance
Configuring the Server Instance
Configuring the Proxy Components
Configuring Security Between Clients and Servers
Configuring Security Between the Proxy and the Data Source
Configuring Servers With the Control Panel
Configuring Data Replication With dsreplication
To Enable Replication Between Two Servers
To Initialize a Replicated Server
To Initialize an Entire Topology
To Obtain the Status of a Replicated Topology
Configuring Large Replication Topologies
Modifying the Replication Configuration With dsconfig
Retrieving the Replication Domain Name
Changing the Replication Purge Delay
To Change the Replication Purge Delay
To Change the Isolation Policy
Configuring Encrypted Replication
To Configure Encrypted Replication
Configuring Replication Groups
To Configure A Replication Group
Configuring Assured Replication
To Configure Assured Replication in Safe Data Mode
To Configure Assured Replication in Safe Read Mode
Configuring Fractional Replication
Configuring Replication Status
To Configure the Degraded Status Threshold
Initializing a Replicated Server With Data
Initializing a Single Replicated Server
Initializing a New Replicated Topology
Adding a Directory Server to an Existing Replicated Topology
Changing the Data Set in an Existing Replicated Topology
To Change the Data Set With import-ldif or Binary Copy
Appending Data in an Existing Replicated Topology
To Initialize a Client Application to Use the External Change Log
Configuring Schema Replication
Replicating to a Read-Only Server
To Configure a Replica as Read-Only
Detecting and Resolving Replication Inconsistencies
Types of Replication Inconsistencies
The heartbeat interval is a property of the replication domain and specifies the frequency with which the replication domain communicates with the replication server. The replication domain expects a regular heartbeat at this interval from the replication server. If the heartbeat is not received, the domain closes its connection and connects to another replication server in the topology.
The default heartbeat interval is ten seconds. If replication is running over a WAN or a network with slow response times, you might want to increase the heartbeat interval. In addition, if you observe an error similar to the following in the logs, it is probably necessary to increase the heartbeat interval.
[26/May/2009:16:32:50 +0200] category=SYNC severity=NOTICE msgID=15138913 msg=Replication Heartbeat Monitor on RS rserver/192.157.197.62:8989 30382 for dc=example,dc=com in DS 10879 is closing the session because it could not detect a heartbeat
The heartbeat interval is sensitive to the settings of your JVM. If you require a lower heartbeat interval than the default, you must configure your JVM to have a low pause time during garbage collection by setting the -XX:+UseConcMarkSweepGC option. For more information, see Configuring the JVM, Java Options, and Database Cache in Sun OpenDS Standard Edition 2.2 Installation Guide.
$ dsconfig -h localhost -p 4444 -D "cn=directory manager" -w password -n \ get-replication-domain-prop \ --provider-name "Multimaster Synchronization" \ --domain-name "dc=example,dc=com (domain 15853)" --advanced \ --property heartbeat-interval Property : Value(s) -------------------:--------- heartbeat-interval : 10 s
The following command changes the heartbeat interval to 5 seconds.
$ dsconfig -h localhost -p 4444 -D "cn=directory manager" -w password -n \ set-replication-domain-prop \ --provider-name "Multimaster Synchronization" \ --domain-name "dc=example,dc=com (domain 15853)" --set heartbeat-interval:5s
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