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Automatic Schema Synchronization in NDB Cluster 8.0: Part 2
In part 1, we took a brief, high-level look at the various protocols and mechanisms used to keep the Data Dictionary (DD) of MySQL servers connected to a MySQL Cluster in synchronization with each other and with the NDB Dictionary.…

Faster restarts with local and partial checkpoints in MySQL NDB Cluster
The MySQL NDB Cluster team works on fundamental redesigns of core parts of NDB architecture. One of these changes is the partial checkpoint algorithm. You can now take full advantage of it when building much larger clusters: NDB 8.0 can use 16 TB data memory per data node for in-memory...

Automatic Schema Synchronization in NDB Cluster 8.0: Part 1
Data nodes are the distributed, sharded storage core of MySQL NDB Cluster. Its data is usually accessed by MySQL Servers (also called SQL nodes in NDB parlance). The MySQL servers each have their own transactional Data Dictionary (DD) where all the metadata describing tables, databases,...

Upgrading MySQL InnoDB Cluster Metadata
As on every release MySQL Shell 8.0.19 includes several bug fixes as well as new features. However, this release includes some significant changes: Fixes for bugs in the schema definition:  Cascading keys in multi-primary mode. Introduction of InnoDB ReplicaSet. These changes required updates to...

A Tale of UDFs with Character Sets
If you are reading this blog post, you likely already know the purpose of user-defined functions (UDF) in MySQL. If you need a quick refresher on UDF’s take a look at the MySQL reference manual.  You may have created your own UDFs as well.…

A new, simple way to figure out why your recursive CTE is running away
In MySQL 8.0.1, we introduced support for recursive common table expressions (CTE). There are quite a few blog entries showcasing the feature, starting from this one, and there is also a complete documentation. Today, I would like to present a solution to a problem which nearly everybody meets when...

Announcing MySQL Cluster 8.0.19, 7.6.13, 7.5.17, 7.4.27, and 7.3.28
We are pleased to announce the release of MySQL Cluster 8.0.19, a new GA, along with 7.6.13, 7.5.17, 7.4.27, and 7.3.28. MySQL Cluster is the distributed, shared-nothing variant of MySQL. This storage engine provides: In-Memory storage – Real-time performance (with optional checkpointing to...

NDB Cluster 8.0 is Generally Available
MySQL’s NDB Cluster Development team proudly announces NDB Cluster 8.0 General Availability. NDB 8.0.19 GA is a completely new generation of the world’s highest throughput transactional datastore MySQL NDB Cluster. Some of the key highlights of 8.0 are NDB is now fully aligned with...

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