What's New in This Guide

This section introduces the documentation updates for release 23.4.x:

Release 23.4.7 - F88999-09, February 2025

No changes are made to this document in this release.

Release 23.4.6 - F88999-08, August 2024

No changes are made to this document in this release.

Release 23.4.5 - F88999-07, July 2024

• Added the REPLICATION_SVC_STORAGE_FULL alert in the cnDBTier Replication Alerts section.
• Updated the response of the following APIs in the cnDBTier Status APIs section:
  • Site Specific Real Time Replication Status
  • Site Specific Replication Status
• Updated the response of the following APIs in the cnDBTier Backup APIs section:
  • Site Specific On-demand Backup Creation
  • Site Specific On-demand Backup Status
• Updated the request, response, or both details of the following APIs in the cnDBTier APIs for CNC Console section:
  • Site specific real time replication status
  • On-demand Backup
  • Initiate on-demand backup
• 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.

Release 23.4.4 - F88999-06, May 2024

• Replaced "fault recovery" with "georeplication recovery" in the entire document wherever the former term was used to indicate performing a georeplication recovery.
• Removed -k flag from the CURL commands in the cnDBTier APIs section as using this flag with CURL commands can compromise the security of the system.

Release 23.4.3 - F88999-05, April 2024

• Made the following changes in the cnDBTier Metrics section:
  • Added the Table 5-1 table to provide information about the metrics dimensions.
  • Updated the dimensions of all the metrics in the section to include the missed dimensions.
  • Added additional attributes to the per fragment metrics in the following sections:
    • cnDBTier ndbinfo Operations Per Fragment Metrics
    • cnDBTier ndbinfo Locks Per Fragment Metrics
• Added the Removing a Georedundant cnDBTier Cluster section with the following sub-sections to provide the procedures to remove a site from a multisite setup:
  • Removing cnDBTier Cluster 4
  • Removing cnDBTier Cluster 3
  • Removing cnDBTier Cluster 2
  • Removing cnDBTier Cluster 1

Release 23.4.2 - F88999-04, February 2024

There are no updates to this document in this release.

Release 23.4.1 - F88999-03, February 2024

• Updated the sample command to call the APIs in the following sections:
  • cnDBTier Stop Replica APIs
  • Starting cnDBTier Georeplication Between Sites
  • Stopping cnDBTier Georeplication Between Sites
• Removed a note from the cnDBTier Scaling section that stated that scaling is not supported in TLS enabled cnDBTier sites as this release supports this scenario.
• Added a step to use georeplication recovery procedure or the dbt_reorg_table_partition script to redistribute the cluster data in the Scaling ndbappmysqld Pods section.
• Added notes in the following sections to state that cnDBTier supports upgrade only while performing the scaling procedures:
  • Scaling ndbmtd Pods
  • Scaling ndbappmysqld Pods With Service Account
  • Scaling ndbappmysqld Pods Without Service Account
  • Scaling ndbmtd Pods
  • Vertical Scaling of db-replication-svc
  • Scaling ndbmysqld Pods
  • Scaling ndbappmysqld Pods
• Added the following sections to provide information to enable and configure TLS:
  • TLS Support for Georeplication
  • Enabling TLS for Georeplication
  • Modifying cnDBTier Certificates to Establish TLS Between Georeplication Sites

Release 23.4.0 - F88999-02, December 2023

Added the cnDBTier Architecture chapter to provide information about cnDBTier architecture and setups.

Release 23.4.0 - F88999-01, December 2023

• Added the Network Policies section to describe the functionality and configurations of network policies in cnDBTier.
• Added the following APIs in the cnDBTier APIs for CNC Console section:
  • List completed backups of the current site
  • Latest Backup of the current site
  • Database Statistic Reports
  • Overall HeartBeat Status
  • On-demand Backup
  • Initiate on-demand backup
• Updated the procedure to change the authentication plugin in the Changing Authentication Plugin on cnDBTier Sites section.
• Added the Recommended Actions row that describes the cause, diagnostic information, and recovery details for each alert in the cnDBTier Alerts section.
• Removed the Configuring cnDBTier SQL Nodes to Support TLS for Georeplication section as TLS is not supported in this release.
• Updated the following horizontal scaling procedures:
  • Scaling ndbappmysqld Pods Without Service Account
  • Scaling ndbappmysqld Pods With Service Account
  • Scaling ndbmtd Pods
• Added a note in the following procedures stating that the procedures are not supported on cnDBTier setups where TLS is enabled:
  • cnDBTier Scaling
  • Converting Multiple Replication Channel Groups to Single Replication Channel Group
  • Converting Single Replication Channel Group to Multiple Replication Channel Groups
  • Adding Georedundant cnDBTier Site
• Updated the following site addition procedures in the Adding Georedundant cnDBTier Site section:
  • 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
• Updated the MySQL version from 8.0.34 to 8.0.35 in the entire document.
• Updated the timestamps in the sample outputs in the entire document.