Cluster connection pooling
The new MySQL Cluster 7.6 GA supports NDB connection pooling – using multiple NDBAPI connections from a single mysqld to NDB – to allow increased concurrency and throughput.

Cluster connection pooling has been supported in MySQL Cluster for quite a while.

…

In one of the projects I have been working on, one requirement was the ability to stop traffic from reaching a MySQL host which has been lagging behind its master for longer than a specific amount of time and then bring it back online once the lag has gone away. Of course, this is all automated and no human intervention is required.

In this scenario, we are using HAProxy as the load balancer, and I will walk you through how to configure an agent so we can use HAProxy httpchk to flag the host as up or down, via systemd socket and then automatically set the host as being down/up when applicable, in HAProxy.

I will be setting up a systemd service (I’m running centos7 hosts) and creating a listening socket in the MySQL host we want to monitor so haproxy can have access to replication status.

Scenario:

master: po-mysql1
slaves: po-mysql2, po-mysql3, po-mysql4
secondary slaves: …

ProxySQL 1.4.2 introduced native clustering, allowing several ProxySQL instances to communicate with and share configuration updates with each other. In this blog post, I’ll review this new feature and how we can start working with 3 nodes.

Before I continue, let’s review two common methods to installing ProxySQL.

ProxySQL as a centralized server

This is the most common installation, where ProxySQL is between application servers and the database. It is simple, but without any high availability. If ProxySQL goes down you lose all connectivity to the database.

ProxySQL on app instances

Another common setup is to install ProxySQL onto each application server. This is good because the loss of one ProxySQL/App server will not bring down the entire application.

For more information about the previous installation, please visit this link …

Protective convenience
Recent versions of MySQL has an added security feature, the –login-path option. This feature puts your username and password in an encrypted file, and you refer clients to this file instead of typing plain text passwords on the console, or putting them in scripts.

…

MySQL Cluster 7.6 is GA!
If you’re eager to give the recently announced MySQL Cluster 7.6 GA a spin, I’ll walk you through a quick and simple way to get started using MySQL Cluster Manager 1.4.6.

Bootstrap and go!

1. Download and install MCM and MySQL Cluster
2. Bootstrap a cluster with MCM
   
   $ mcmd –bootstrap
3. Connect to the database, and have at it
   
   $ mysql -h 127.0.0.1 -P 3306 -u root

That simple.…

It gives us great pleasure to announce that the 7.6 release of MySQL Cluster is now ready for prime time.

MySQL Cluster is the distributed database combining linear scalability and high availability. It provides in-memory real-time access with transactional consistency across partitioned and distributed datasets designed for mission critical applications.…

In the Replication QA team, we have been continuing to improve test coverage for Replication and Group Replication primarily to ensure that we support the newest and latest offerings of MySQL Server 8.0 such as Generated Columns, Set Persist, User Roles, and User Management DDLs that are now atomic.…

This post is about setting up MySQL InnoDB Cluster with 5 nodes on a sandbox deployment.  Here, we focus on implementation part, the core concepts will be explained in separate posts.

Prerequisites:

• MySQL Engine
• MySQL Shell
• MySQL Router

Deploying MySQL InnoDB Cluster involves the following steps:

• Deploying MySQL Engine (Sandbox Instance)
• Creating an InnoDB Cluster
• Adding nodes to InnoDB Cluster
• Configuring MySQL Router for High Availability.
• Testing High Availability.

Deploying MySQL Engine:

If the MySQL engines are already installed on all the nodes, you can skip this step and directly move into creating an InnoDB Cluster part.

I am deploying 5 Sandbox instances (which is in-built on MySQL Shell application) on a same …

There are lots of new features in MySQL 8.0 that was recently released including our Document Store capability.  There are a few core capabilities related to InnoDB Cluster in 8.0 that I’d like to share but some will arrive in some coming blogs.  Primarily here I’ll point out some nice details with InnoDB Cluster 8.0… Read More »

MySQL Cluster Manager 1.4.6 is now available for download from My Oracle Support.

Overview
In MCM 1.4.6, the list backups command has been extended with a new –agent option for listing agent backups created with the backup agents command.

mcm> list backups --agent mysite;
+------------+-------+---------+----------------------+---------+
| BackupId   | Agent | Host    | Timestamp            | Comment |
+------------+-------+---------+----------------------+---------+
| 1522914101 | 0     | tonfisk | 2018-04-05 07:41:41Z |         |
| 1522914105 | 0     | tonfisk | 2018-04-05 07:41:45Z |         |
| 1522914121 | 0     | tonfisk | 2018-04-05 07:42:01Z |         | …