Cluster Linking Monitoring

Cluster Link jobs provide dedicated management interfaces for mirror topics and consumer groups. Unlike connector-based jobs, Cluster Link allows dynamic addition, promotion, and failover of mirror topics without stopping the underlying link.

Manage Mirror Topics

The Manage Mirror Topics section provides full control over which topics are mirrored through the cluster link.

Summary Counters

Metric	Description
Total Topics	All topics discovered on the source cluster
Mirrored	Topics currently being mirrored through the link
Available to Add	Topics eligible to be added as mirror topics

Mirror Topic States

State	Indicator	Available Actions
Mirrored	Green badge	Promote, Failover
Available	Default	Add Mirror
Conflicting	Warning badge	None (naming conflict on destination)

Sync Progress

For each mirrored topic, the interface displays:

• Partition Count: Number of partitions in the topic
• Replication Factor: Replica configuration
• Progress Bar: Visual indicator of replication completeness
• Per-partition Lag: Offset difference between source and mirror for each partition

Tip

Use the Promote action when you are ready to convert a mirror topic into a regular topic on the destination cluster. This is a one-way operation and should only be performed during cutover. The Failover action handles the same conversion but is intended for disaster recovery scenarios.

Manage Mirror Consumer Groups

The Manage Mirror Consumer Groups section controls which consumer groups have their offsets synchronized through the cluster link.

Summary Counters

Metric	Description
Total Groups	All consumer groups discovered on the source cluster
Mirrored	Groups currently being synchronized through the link
Available to Add	Groups eligible to be added for offset synchronization

Mirror Consumer Group States

State	Indicator	Available Actions
Already Mirrored	Green badge	Exclude
Not Selected	Default	Add Mirror
Excluded	Red badge	Re-add available

Per-Group Details

For each mirrored consumer group, the interface displays:

• Subscribed Topics: Topics the group consumes
• Sync Progress: Visual indicator of offset synchronization
• Offset Lag: Difference between source and destination offsets per partition

Manage Schemas

The Manage Schemas section is available when schema management is enabled. It provides control over which schema subjects are synchronized as part of the Cluster Link migration.

Summary Counters

Metric	Description
Total Schemas	All schema subjects discovered on the source registry
Mirrored	Subjects currently being synchronized
Available to Add	Subjects eligible to be added for synchronization

Schema Subject States

State	Indicator	Available Actions
Mirrored	Green badge	Exclude
Available	Default	Add

Per-Subject Details

For each mirrored schema subject, the interface displays:

• Type: Serialization format (JSON, AVRO, PROTOBUF)
• Source Version: Current version on the source registry
• Destination Version: Current version on the destination registry
• Status: Synchronization state (Synced, Syncing, Version Mismatch)

Caution

Adding or removing mirror topics and consumer groups takes effect immediately on the cluster link. Ensure you coordinate changes with your team to avoid disrupting active consumers or producers.