Codership is pleased to announce the release of Galera Replication library 3.24, implementing wsrep API version 25.  The new release includes improved deadlock error management with foreign keys and security fixes. As always, Galera Cluster is now available as targeted packages and package repositories for a number of Linux distributions, including Ubuntu, Red Hat, Debian, CentOS, OpenSUSE and SLES, as well as FreeBSD. Obtaining packages using a package repository removes the need to download individual files and facilitates the easy deployment and upgrade of Galera Cluster nodes.

This release incorporates all changes up to MySQL 5.7.23, MySQL 5.6.41 and MySQL 5.5.61.

Galera Replication Library 3.24
New features and notable fixes in Galera replication since last binary release by Codership (3.23)

* A support for new …

Galera Cluster is the leading high availability solution for MySQL and MariaDB. We are always looking for bright and driven people who have a passion for technology, especially for database replication and clustering. If you are interested in challenging work, being part of a innovative team and world’s leading MySQL clustering company-then Codership is right place for you!  This is a remote job.

Job Description and Responsibilities

• Write Galera Cluster technical marketing material (blogs, white papers, benchmarks)
• Prepare presentations and present at webinars and conferences
• Be active in social media channels and forums
• Consult customers for Galera Cluster best practices
• Pre-sales support
• Interface with the development team to provide user feedback
• Assist in writing Galera documentation

…

In the previous article we researched MySQL Client / Server Protocol using WireShark. Now lets start to write our codes in python to simulate MySQL native client. Ready codes are here: Github repo

First of all we have to create MYSQL_PACKAGE class. MYSQL_PACKAGE class is the parent of all other package classes (HANDSHAKE_PACKAGE, LOGIN_PACKAGE, OK_PACKAGE and etc.)

class MYSQL_PACKAGE: “””Data between client and server is exchanged in packages of max 16MByte size.”””    def __init__(self, resp= b”):       self.resp = resp       self.start =0       …

MySQL Client / Server protocol is used in many areas. For example:

• MySQL Connectors like ConnectorC, ConnectorJ and etc.
• MySQL proxy
• Between master and slave

What is MySQL Client / Server protocol?

MySQL Client / Server protocol is accepted conventions (rules). Through these rules client and server “talks” and understand each other. Client connects to server through TCP connection with special socket, sends to server special packets and accepts them from server. There are two phases of this connection:

• Connection phase
• Command phase

Next illustration describes phases:

STRUCTURE OF PACKETS

Each packet consists of valuable data types. Maximum length of each packet can be 16MB. If the length of packet is more than 16MB, then it is separated into several chunks (16MB). First of all let’s see the protocol data types. …

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: …

“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 …

Let’s look at some of the most popular Percona Database Performance Blog posts in 2017.

The closing of a year lends itself to looking back. And making lists. With the Percona Database Performance Blog, Percona staff and leadership work hard to provide the open source community with insights, technical support, predictions and metrics around multiple open source database software technologies. We’ve had over three and a half million visits to the blog in 2017: thank you! We look forward to providing you with even better articles, news and information in 2018.

As 2017 moves into 2018, let’s take a quick look back at some of the most popular posts on the blog this year.

Top 10 Most Read

These posts had the most number of views (working down from the highest):

…

“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

Idea to create channel in the telegram came me from my friend. I have a lot of  useful electronic materials about programming, and he offered me to share them in telegram channel. To create channel is very easy. But share materials manually is very boring and wasting time. That’s why I’ve decided to automate it using mysql and python. First of all I’ve created table in the mysql to store my books there. And then i’ve created my first bot in telegram. Documentation of telegram bots: https://core.telegram.org/bots

Also you can find API documentation of telegram bots here: https://core.telegram.org/bots/api

And than was created channel. You can learn how to create channel from here:  …