The Madrid MySQL Users Group has been a bit quiet recently so we thought it would be good to have a meeting again. The next meeting will take place next on Wednesday, 25th April and will cover Galera Cluster (Presentation by Emanuele Mottola).  We will also talk about MySQL 8.0 and any latest updates that … Continue reading MMUG18: Multi-instances with Galera Cluster and MySQL 8.0 on 25th April in Madrid

In this blog post, We will be explaining about the timeouts in SST on systemd implementation which we faced recently in Percona XtraDB Cluster  during our Consulting with a client. State Snapshot Transfers (SST) refers to complete data sync from one of the nodes from the cluster to the joining node.

SST will happen for one or more reasons listed below.

1. Initial sync to join a node to cluster.
2. Node is out of cluster and lost its ability to join back due to data corruption or inconsistencies and also when the node went far behind the node, …

Codership is pleased to announce the release of Galera Replication library 3.23, implementing wsrep API version 25.

This release incorporates all changes up to MySQL 5.7.21, MySQL 5.6.39 and MySQL 5.5.59, including several fixes to vulnerabilities reported by Oracle in here.

New features and notable fixes in Galera replication since last binary release
by Codership (3.22):

• Write set serialization has been changed to use proper memory alignment in order to avoid crashes on platforms which do not allow unaligned memory access (http://www2.galeracluster.com/e/38852/codership-galera-issues-445/88b8yp/875788176)

Notable bug fixes in MySQL 5.7.21: …

Join Percona Chief Evangelist Colin Charles as he covers happenings, gives pointers and provides musings on the open source database community.

Percona Live Santa Clara 2018 update: tutorials have been picked, and the schedule/press release should be announced by next week. We’ve (the committee) rated over 300+ talks, and easily 70% of the schedule should go live next week as well.

There’s a lot happening for FOSDEM this week — so expect a longer report of some sort next week.

A friend, Yanwei Zhou, DBA at Qunar in China, gave an excellent presentation in Chinese on how they use Percona Toolkit. …

“Our three megastores’ and webshop’s combined revenue was 432 million euros in the year 2017. Galera Cluster has been the cornerstone of the system, secured our sales and supported our growth.”

“MySQL master/slave setup was just too fragile and needed regular work to fix each time the slave got out of sync. Now with Galera we’ve found that even if we take a node offline for a while, it re-syncs automatically and without intervention.”

“The big plus is that all nodes have exact the same information, and no node is running for even a fraction of a second behind. This will also mean that no information will be lost!”

READ MORE CASE STUDIES AND TESTIMONIALS

Use the opportunity to talk to Galera Cluster developers and experts. Visit Galera Cluster booth at Conrad Hotel, New York City February 26-27. We will be happy to answer your questions and verify your Galera deployment plans.

There are many Galera Cluster presentations at the conference.

Under the Hood: Galera Cluster

Seppo Jaakola, CEO Codership

Tuesday 27th, 8:40 am – 9:30 am

This session will provide attendees with common use cases for clustering, a comprehensive explanation of how clustering works with Galera and introduce new features and improvements available in Galera Cluster 4.

Global Data Replication with Galera for Ansell Guardian

Greg Henderson and Louis Zircher

Monday 26th, 4:00 pm – 4:50 pm

In early 2017, we seamlessly replaced the global geo-distributed data synchronization …

“We wanted a solution which was backward compatible with our frameworks, as we have used mainly MySQL, which was reliable and nearly 100% data consistent.  If our application were to execute a commit and receive a successful response, we needed a 100% guarantee that we have rows of data in our database — and for more than that one instance.”

There were many options E-CARD explored. “First, we tried MySQL NDB Cluster. That was a very frustrating experience. After that we tried a few other plugins and extensions of MySQL, but they weren’t complete solutions. At the end of this process, we found Galera with MySQL. It responded to our needs nearly 100% of the time.”

Read the full story

Bulgarian National Lottery chooses Galera Cluster

Codership is pleased to announce a new release of Galera Cluster for MySQL consisting of MySQL-wsrep 5.5.58, 5.6.38, 5.7.20 and new Galera 3.22 library, wsrep API version 25.

NEW FEATURES AND NOTABLE FIXES IN THE GALERA REPLICATION LIBRARY SINCE LAST BINARY RELEASE BY CODERSHIP (3.21):

New features and notable fixes in Galera replication since last binary release

* Reporting last committed write set fixed to respect commit ordering (MW-341)

* GComm socket level error handling improved to avoid backend thread exit
in case of unexpected input from ASIO IO service (GAL-518)

* Race condition fixed in GComm message sending codepath (GAL-520)

* Fix for EVS protocol stall due to exhausted send window setting. This
bug could stall cluster messaging until the next keepalive was sent by
some node, causing …

Since its creation, Galera Cluster has established itself as the most popular high availability solution for MySQL and MariaDB users worldwide.

ClusterControl is the go-to automation and management system for Galera Cluster users.

And together, we’re going to walk you through all the different aspects that make Galera Cluster such a popular high availability solution for MySQL and MariaDB and how to best manage it with ClusterControl.

We’ll hear about the latest features of Galera Cluster directly from Codership, the creators of Galera Cluster. And we’ll look at how to automate everything from deployment, monitoring (how about ASCII-art graphs?), backups, failover, recovery, rolling upgrades and scaling using the ClusterControl CLI (for a change, we also have a GUI of course).

AGENDA

Introduction
About Codership, the makers of Galera Cluster
About Severalnines, the makers of …

Since its creation, Galera Cluster has established itself as the most popular high availability solution for MySQL and MariaDB users worldwide.

ClusterControl is the go-to automation and management system for Galera Cluster users.

And together, we’re going to walk you through all the different aspects that make Galera Cluster such a popular high availability solution for MySQL and MariaDB and how to best manage it with ClusterControl.

We’ll hear about the latest features of Galera Cluster directly from Codership, the creators of Galera Cluster. And we’ll look at how to automate everything from deployment, monitoring (how about ASCII-art graphs?), backups, failover, recovery, rolling upgrades and scaling using the ClusterControl CLI (for a change, we also have a GUI of course).

AGENDA

Introduction
About Codership, the makers of Galera Cluster
About Severalnines, the makers of …