MySQL InnoDB Cluster is the most easy and integrated High Availability solution for MySQL.

The solution is composed of:

• MySQL Server
• MySQL Group Replication Plugin
• MySQL Clone Plugin
• MySQL Router
• MySQL Shell

All those components are developed and tested together to provide the easiest and best experience to the MySQL users.

As the MySQL Router is a TCP Level 4 router (like HA Proxy), some users requiring a more “intelligent” proxy having other extra features like caching, read/write splitting in relation with the user or SQL, firewall, … may be interested in using ProxySQL… and this is a good choice !

ProxySQL / MySQL Router in OSI Model

However, even is ProxySQL supports MysQL Group Replication, for …

This post covers Proxysql start up process, Layers and configuration file.

The problem

In PXC 5.6 and 5.7, when using xtrabackup-v2 as the SST method, the DBA must create a user with the appropriate privileges for use by Percona XtraBackup (PXB). The username and password of this backup user are specified in the wsrep_sst_auth variable.

This is a problem because this username and password was being stored in plaintext and required that the configuration file be secured.

The PXC 8.0 solution

(This feature is still under development and may change before PXC 8.0 GA)

Because the wsrep_sst_auth is only needed on the donor side to take a backup, PXC 8.0 uses an internal user (created specifically for use by PXC) with a randomly generated password. Since this user is only needed on the donor, the plaintext password is not needed on the joiner …

Percona Live Europe Amsterdam Day 1 was a bunch of fun, especially since I didn’t have to give a talk or anything since my tutorial was over on Day 0.

At lunch, I realised that there are a lot more fringe events happening around Percona Live… and if you’ve seen how people do “tech weeks”, maybe this is what the event ends up being – a show, plus plenty of focused satellite events. FOSDEM in the open source world totally gets this, and best of all, also lists fringe events (see example from 2019).

So, Thursday evening gets a few fringe events, a relatively short train ride away:

• ClickHouse Paris Meetup 2019
• …

Percona is happy to announce the first experimental binary of Percona XtraDB Cluster 8.0 on October 1, 2019. This is a major step for tuning Percona XtraDB Cluster to be more cloud- and user-friendly. This release combines the updated and feature-rich Galera 4, with substantial improvements made by our development team.

Improvements and New Features

Galera 4, included in Percona XtraDB Cluster 8.0, has many new features. Here is a list of the most essential improvements:

• Streaming replication supports large transactions
• The synchronization functions allow action coordination (wsrep_last_seen_gtid, wsrep_last_written_gtid, wsrep_sync_wait_upto_gtid)
• More granular and improved error logging. wsrep_debug is now a multi-valued variable to assist in controlling the logging, and logging messages have been significantly improved.
…

Just delivered a tutorial on MariaDB Server 10.4. Decided to take a closer look at the schedule for Percona Live Europe Amsterdam 2019 and one thing is clear: feels like there should also be a ProxySQL tutorial, largely because at mine, I noticed like 20% of the folk saying they use it.

Seems like there are 2 talks about it though, one about real world usage on Oct 1, and one about firewall usage with AWS, given by Marco Tusa on Oct 2.

Which led me to the ProxySQL Technology Day 2019 in Ghent, Belgium. October 3 2019. 2 hour train ride away from Amsterdam Schipol (the airport stop). It is easy to grab a ticket at Schipol Plaza, first class is about €20 more per way than second class, and a good …

Multiplexing Background

Historically it’s a technique used in networking to integrate multiple analog and digital signals via a shared medium. The goal of multiplexing over the network was to enable signals to be transmitted more efficiently for a given communication channel, thus achieving cost efficiency. 

Since the term Multiplexing comes from telecommunications, the industry has heavily used a device called Multiplexers – aka Mux. There was even a term called muxing where signals were often analog and digital to be combined in a single line. 

The technique was developed in the early 1870s, it’s origins to be found in telegraphy, and it has become a standard for digital telecommunications in the 20th Century. 

Following multiplexing methods are currently available: 

• Frequency Division Multiplexing (FDM)
• Time Division Multiplexing (TDM) …

As people are getting back from vacations and application traffic is going back and hitting database backend hard, it is a good time to think about performance and prepare for the winter holiday spike. Whenever you are on-premise or in the cloud, questions are the same:

• Are we satisfied with the current MySQL performance?
• How much traffic are we currently serving?
• Is there enough capacity to stay stable as traffic increases?
• What would be the best way to stay cost-effective as we grow?

Unfortunately, the answers are not so obvious and require a thorough performance analysis. However, there is a chance that your problem has already been solved by someone else. I do not mean StackOverflow (which is a beautiful place, by the way), but some higher level questions which people usually discuss at conferences, and we have several of them ongoing or just a couple of weeks away.

…

Percona is happy to announce the release of Percona XtraDB Cluster 5.7.27-31.39 on September 18, 2019. Binaries are available from the downloads section or from our software repositories.

Percona XtraDB Cluster 5.7.27-31.39 is now the current release, based on the following:

• Percona Server for MySQL 5.7.27-30
• Codership WSREP API release 5.7.27
• Codership Galera library 3.28

All Percona software is open-source and free.

Bugs Fixed

• PXC-2432: PXC was not …

Percona is glad to announce the release of Percona XtraDB Cluster 5.6.45-28.36 on September 17, 2019. Binaries are available from the downloads section or from our software repositories.

Percona XtraDB Cluster 5.6.45-28.36 is now the current release, based on the following:

• Percona Server 5.6.45-86.1
• Codership WSREP API release 5.6.44
• Codership Galera library 3.28

All Percona software is open-source and free.

Bugs Fixed

• PXC-2432: PXC was not updating …