DBLE 2.19.09.0 Release Notes – New Features, Bug Fixes, HA Interface and Dump‑Split Command

Project Overview

DBLE (also known as “MyCat Plus”) is an enterprise‑grade open‑source distributed middleware that provides data horizontal partitioning, read/write separation, distributed transaction support, multi‑shard algorithms, global IDs, and IP/SQL black‑white lists.

Official resources: GitHub repository , Documentation , and release packages at GitHub releases .

New Version Highlights (2.19.09.0)

Added eight refactored functions and 34 defect fixes.

Introduced external MySQL‑HA interface with three management commands: dataHost @@disable , dataHost @@enable , and dataHost @@swtich , plus a status query dataHost @@events .

Provided a dump‑file split command mysql > split src dest [-r500] [-w500] [-l10000] to partition mysqldump files per backend datanode.

These HA commands work with Zookeeper clusters, allowing a single node notification to trigger coordinated failover.

External HA Interaction Diagram

Dump‑File Split Command Details

The command splits a source dump file into per‑datanode files, supporting options for read/write queue sizes ( -r , -w ) and maximum values per INSERT ( -l ). Example:

split /tmp/mysql_dump.sql /tmp/dump/

For full usage, see the documentation links provided in the original notes.

Complete Release Notes (Translated)

Features added include external MySQL‑HA interface, dump‑file split support, new ChildTable property incrementColumn , new partition algorithm parameter ruleFile , JWS upgrade, heartbeat name distinction, and refactoring of Dbleserver startup.

Bug‑fixes cover cluster restart checks, incorrect EXPLAIN results with using() , privilege‑related query inaccuracies, transaction handling issues, back‑quote handling, and many other edge cases.

Compatibility changes modify reload @@config behavior, add heartbeat name, and refactor show @@directmemory .

Breaking backward compatibility notes summarize the same three changes.