What's New in This Guide

This section introduces the documentation updates for release 24.2.x.

Release 24.2.6 - F98188-07, July 2025

• Updated the sections Starting cnDBTier Georeplication Between Sites and Stopping cnDBTier Georeplication Between Sites to add example scenarios and provided details on the APIs that can be used to start or stop georeplication services.

Release 24.2.5 - F98188-06, May 2025

Added a note in the Scaling ndbmtd Pods section to provide the information about rerunning the dbt_reorg_table_partition script when a restart or a backup operation is ongoing.

Release 24.2.4 - F98188-05, February 2025

No changes are made to this document in this release.

Release 24.2.3 - F98188-04, January 2025

• Updated the following vertical scaling procedures to include the steps to scale PVCs using the dbtscale_vertical_pvc script:
  • Scaling ndbmtd Pods
  • Scaling ndbappmysqld Pods
  • Scaling ndbmysqld Pods
  • Vertical Scaling of db-replication-svc Pods
  • Scaling of ndbmgmd Pods
• Updated the backup size limit after which the BACKUP_SIZE_GROWTH alert is triggered from 5% to 20% in the cnDBTier Automated Backup Alerts section.

Release 24.2.2 - F98188-03, October 2024

• Added the Scaling of ndbmgmd Pods section to describe the procedure to scale ndbmgmd pods vertically.
• Added the Modifying HTTPS Certificates section to describe the procedure to modify HTTPS certificates.
• Updated the descriptions of HIGH_CPU (Major and Critical) alerts in the cnDBTier CPU Usage Alerts section to indicate that these alerts are specific to cnDBTier data nodes.

Release 24.2.1 - F98188-02, September 2024

• Added the Ingress and Egress Communication Over External IPs section to provide details about the ingress and egress routes in multi-cluster setups.
• Updated the overview of the REST APIs for CNC Console feature in the REST APIs for CNC Console section to add details about georeplication recovery using CNC console.
• Added the Support for CNE Cloud Native Load Balancer (CNLB) section to provide details about the CNLB feature.
• Added the cnDBTier Password Encryption section to provide details about encrypting cnDBTier passwords.
• Added the cnDBTier API Node Read and Write Metrics section to provide information about the following metrics:
  • db_tier_api_node_bytes_writes
  • db_tier_api_node_bytes_reads
• Added the db_tier_cluster_status metrics in the cnDBTier Node Status Metrics section to provide details about the metric used to measure the cluster status.
• Made the following updates in the cnDBTier Alerts section:
  • Added the REPLICATION_SVC_STORAGE_FULL alert in the cnDBTier Replication Alerts section.
  • Updated the conditions of the following alerts in the cnDBTier Memory Usage Alerts:
    • LOW_MEMORY
    • OUT_OF_MEMORY
  • Updated the SNMP Trap ID value of the BACKUP_STORAGE_LOW alert from 2024 to 2014 in the cnDBTier Automated Backup Alerts section.
  • Updated the SNMP Trap ID value of the REPLICATION_EPOCHS_LOST alert from 2024 to 2023 in the cnDBTier Replication Error Skip Alerts section.
  • Updated the SNMP Trap ID value of the HIGH_CPU (critical) alert from 2002 to 2035 in the cnDBTier CPU Usage Alerts section.
  • Updated the condition of the NODE_DOWN alert in the cnDBTier Node Status Alerts section.
  • Updated the SNMP Trap ID value of the BINLOG_STORAGE_LOW (major) alert from 2007 to 2036 in the cnDBTier Bin Log Usage Alerts section.
• Made the following updates in the cnDBTier APIs section:
  • Updated the response payload of the APIs in following sections:
    • cnDBTier Backup APIs
    • cnDBTier Status APIs
    • cnDBTier APIs for CNC Console
  • Added the following APIs that are used to perform georeplication recovery using CNC Console in the cnDBTier APIs for CNC Console section:
    • cnDBTier Cluster Details
    • Get Failed cnDBTier Clusters
    • Mark cnDBTier Clusters As Failed
    • Monitor Georeplication Recovery Status
    • Start Georeplication Recovery
• Added a note in the Scaling ndbmtd Pods section to state that the newly added ndbmtd pods can crash and restart after an upgrade and this error can be ignored.
• Added the Modifying cnDBTier Password Encryption Key section to describe the procedure to modify the encryption key used to encrypt the replication username and password.
• Updated the following site addition procedures by removing redundant steps:
  • Adding cnDBTier Georedundant Cluster to Single Site cnDBTier Cluster
  • Adding cnDBTier Georedundant Cluster to Two-Site cnDBTier Clusters
  • Adding cnDBTier Georedundant Cluster to Three-Site cnDBTier Clusters
• Made the following changes in the Removing a Georedundant cnDBTier Cluster section:
  • Added the Extracting cnDBTier Cluster Script section to describe the procedure to extract the dbtremovesite script.
  • Updated the following site removal procedures with the steps to remove cnDBTier sites using the dbtremovesite script:
    • Removing cnDBTier Cluster 4
    • Removing cnDBTier Cluster 3
    • Removing cnDBTier Cluster 2
    • Removing cnDBTier Cluster 1
• Added a note in the following sections to inform that the "occne-cndbtier" namespace name used in the section is only an example and must be configured according to the user's environment:
  • cnDBTier APIs
  • Maintenance Procedures
• Updated the MySQL version from "8.0.36" to "8.0.37" in the entire document.
• Updated the timestamps in the sample outputs in the entire document.