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Percona XtraDB Cluster 5.6.27-25.13 is now available

 | January 11, 2016 |  Posted In: Events and Announcements, MySQL, Percona Software, Percona XtraDB Cluster

How to calculate the correct size of Percona XtraDB Cluster's gcache

Percona is glad to announce the new release of Percona XtraDB Cluster 5.6 on January 11, 2016. Binaries are available from the downloads area or from our software repositories. Percona XtraDB Cluster 5.6.27-25.13 is now the current release, based on the following: Percona Server 5.6.27-75.0 Percona Server 5.6.27-76.0 Galera Replicator 3.13 Codership wsrep API 25.12 All […]

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Better high availability: MySQL and Percona XtraDB Cluster with good application design

 | December 21, 2015 |  Posted In: High-availability, Insight for DBAs, MySQL, Percona XtraDB Cluster, Replication, XtraDB Cluster

High Availability Have you ever wondered if your application should be able to work in read-only mode? How important is that question? MySQL seems to be the most popular database solution for web-based products. Most typical Internet application workloads consist of many reads, with usually few writes. There are exceptions of course – MMO games […]

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How Big Can Your Galera Transactions Be

 | October 26, 2015 |  Posted In: Percona XtraDB Cluster

While we should be aiming for small and fast transactions with Galera, it is always possible at some point you might want a single large transaction, but what is involved? First, this is supposed to be controlled by two settings, wsrep_max_ws_rows  and wsrep_max_ws_size . The first variable is not yet enforced and has no effect – see […]

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Proxy Protocol and Percona XtraDB Cluster: A Quick Guide

 | October 15, 2015 |  Posted In: MySQL, Percona XtraDB Cluster

cluster3

On September 21st, we released Percona XtraDB Cluster 5.6.25. This is the first PXC release supporting proxy-protocol that has been included in Percona Server since 5.6.25-73.0. With this blog post, I want to promote a new feature that you may have ignored. Let’s start with a description of the use case: Architecture Overview: HAProxy is configured like […]

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Percona XtraDB Cluster 5.6.26-25.12 is now available

 | October 15, 2015 |  Posted In: Events and Announcements, MySQL, Percona Software, Percona XtraDB Cluster

Percona is glad to announce the new release of Percona XtraDB Cluster 5.6 on October 15th 2015. Binaries are available from downloads area or from our software repositories. Based on Percona Server 5.6.26-74.0 including all the bug fixes in it, Galera Replicator 3.12, and on Codership wsrep API 25.11, Percona XtraDB Cluster 5.6.26-25.12 is now […]

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Percona XtraDB Cluster 5.6.25-25.12 is now available

 | September 21, 2015 |  Posted In: Events and Announcements, MySQL, Percona Software, Percona XtraDB Cluster

Percona is glad to announce the new release of Percona XtraDB Cluster 5.6 on September 21st 2015. Binaries are available from downloads area or from our software repositories. Based on Percona Server 5.6.25-73.1 including all the bug fixes in it, Galera Replicator 3.12, and on Codership wsrep API 25.11, Percona XtraDB Cluster 5.6.25-25.12 is now […]

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Clarification on “Call me Maybe: MariaDB Galera Cluster”

 | September 17, 2015 |  Posted In: InnoDB, MariaDB, MySQL, Percona XtraDB Cluster

Recently Aphyr (Kyle Kingsbury) published https://aphyr.com/posts/327-call-me-maybe-mariadb-galera-cluster The article is technically valid, I am not going to dispute a conclusion Aphyr made, but it is also quite technically involved, so users who just jump to conclusion may get the wrong impression and we’re left with more questions than ever. So, let me state what is the […]

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High-load clusters and desynchronized nodes on Percona XtraDB Cluster

 | August 31, 2015 |  Posted In: MySQL, Percona XtraDB Cluster

There can be a lot of confusion and lack of planning in Percona XtraDB Clusters in regards to nodes becoming desynchronized for various reasons.  This can happen a few ways: An IST or SST joining node catching up after a state transfer (Joined/Joining state) Using wsrep_desync for something like a backup Executing a rolling-schema-upgrade using […]

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