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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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PXC – Incremental State transfers in detail

 | August 5, 2015 |  Posted In: MySQL, Percona XtraDB Cluster

IST Basics State transfers in Galera remain a mystery to most people.  Incremental State transfers (as opposed to full State Snapshot transfers) are used under the following conditions: The Joiner node reports Galera a valid Galera GTID to the cluster The Donor node selected contains all the transactions the Joiner needs to catch up to […]

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TOI wsrep_RSU_method in PXC 5.6.24 and up

 | July 6, 2015 |  Posted In: MySQL, Percona XtraDB Cluster

I noticed that in the latest release of Percona XtraDB Cluster (PXC), the behavior of wsrep_OSU_method changed somewhat.  Prior to this release, the variable was GLOBAL only, meaning to use it you would:

This had the (possibly negative) side-effect that ALL DDL’s issued on this node would be affected by the setting while in […]

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Playing with Percona XtraDB Cluster in Docker

 | June 30, 2015 |  Posted In: High-availability, MySQL, Percona XtraDB Cluster, Quality Assurance, XtraDB Cluster

Like any good, thus lazy, engineer I don’t like to start things manually. Creating directories, configuration files, specify paths, ports via command line is too boring. I wrote already how I survive in case when I need to start MySQL server (here). There is also the MySQL Sandbox which can be used for the same […]

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