Cloning with Hermes Messaging Service enabled
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- UpdatedJan 30, 2025
- 2 minutes to read
- Yokohama
- Now Platform Capabilities
To clone your database from one instance to another successfully with Hermes enabled, you must ensure that certain Hermes tables are preserved and excluded. The list of tables in the preserve list should match those in the exclude list and vice versa.
Before you request a clone, verify the Hermes tables in the preserve and exclude lists. For example, make sure the sys_kafka_topic table is in the preserve list to maintain the current Hermes topics in the target instance. If the sys_kafka_topic table is not preserved, it is overwritten when the clone operation occurs.
The following sections assume that Hermes is installed on both the source and target instances before the clone. For example, if Hermes is not installed on the target instance, there are no Hermes tables to preserve.
To avoid losing this data, capture the data in the following Hermes tables using an update set:
- hermes_cluster_config
- hermes_topics_state
- hermes_topic_location
- hermes_topics_metrics
- hermes_metrics
You must ensure the hermes_cluster_config and hermes_topic_location tables are preserved to ensure the Hermes Messaging Service is functional.
Hermes tables to preserve
Add the following Hermes tables to the Clone Data Preservers list if they're missing. Remove any Hermes tables that aren't in this list.
- hermes_app_services
- hermes_audit_operational_metadata
- hermes_audit_records
- hermes_client_metrics
- hermes_cluster_config
- hermes_metrics
- hermes_metrics_collection
- hermes_system_status
- hermes_topic_audit_records
- hermes_topic_location
- hermes_topics_metrics
- hermes_topics_state
- hermes_usage_metrics
- sys_kafka_namespace
- sys_kafka_topic
Hermes tables to exclude
Add the following Hermes tables to the Clone Exclude Tables list if they're missing. Remove any Hermes tables that aren't in this list.
- hermes_app_services
- hermes_audit_operational_metadata
- hermes_audit_records
- hermes_client_metrics
- hermes_cluster_config
- hermes_metrics
- hermes_metrics_collection
- hermes_system_status
- hermes_topic_audit_records
- hermes_topic_location
- hermes_topics_metrics
- hermes_topics_state
- hermes_usage_metrics
- sys_kafka_namespace
- sys_kafka_topic
Related Content
- Check the status of and connection to the Hermes Kafka cluster
Check the status of and test the connection to the Hermes Kafka cluster by sending and receiving test messages.
- Monitoring data throughput in Hermes
Monitor data that is processed by the Hermes Messaging Service over time.
- Tracking message usage in Hermes
Message usage through the Hermes Messaging Service is tracked for monitoring and management purposes through the Kafka topic name.
- View Hermes Messaging Service log messages
Review Hermes event details by viewing log messages.