ForgeRock Directory Services

Disk space thresholds

Replication servers record changes in changelog database files under the opendj/changelogDb directory.

Do not compress, tamper with, or otherwise alter changelog database files directly, unless specifically instructed to do so by a qualified ForgeRock technical support engineer.

External changes to changelog database files can render them unusable by the server.

Replication server configuration objects have changelog database properties, disk-low-threshold, and disk-full-threshold:

  • When available disk space falls below disk-low-threshold, the replication server triggers a warning alert notification to let you know to free disk space.

  • When available disk space falls below disk-full-threshold, the replication server triggers another warning alert notification, and disconnects from the replication topology.

    Connected directory servers fail over to another replication server until available disk space is above the disk-full-threshold again.

Set the thresholds high enough to allow time to react after the initial alert.

The following example sets disk-low-threshold to 10 GB and disk-full-threshold to 5 GB:

$ dsconfig \
 set-replication-server-prop \
 --provider-name "Multimaster Synchronization" \
 --set "disk-low-threshold:10 GB" \
 --set "disk-full-threshold:5 GB" \
 --hostname localhost \
 --port 4444 \
 --bindDN uid=admin \
 --bindPassword password \
 --usePkcs12TrustStore /path/to/opendj/config/keystore \
 --trustStorePassword:file /path/to/opendj/config/keystore.pin \
 --no-prompt

The disk-low-threshold and disk-full-threshold properties are advanced properties. Examine their values with the dsconfig --advanced option.