August 20, 2014

Introducing backup locks in Percona Server

TL;DR version: The backup locks feature introduced in Percona Server 5.6.16-64.0 is a lightweight alternative to FLUSH TABLES WITH READ LOCK and can be used to take both physical and logical backups with less downtime on busy servers. To employ the feature with mysqldump, use mysqldump –lock-for-backup –single-transaction. The next release of Percona XtraBackup will […]

Percona XtraDB Cluster 5.6.15-25.2 first Release Candidate is now available

Percona is glad to announce the first RC release of Percona XtraDB Cluster 5.6 on December 18th, 2013. Binaries are available from downloads area or from our software repositories. Based on Percona Server 5.6.15-63.0 including all the bug fixes in it, Galera Replicator 3.2 and on Codership wsrep API 5.6.15-25.2 is now the first RELEASE […]

Percona XtraDB Cluster 5.5.33-23.7.6 is now available

Percona is glad to announce the release of Percona XtraDB Cluster 5.5.33-23.7.6 on September 18, 2013. Binaries are available from the downloads area or from our software repositories. New Features: Default State Snapshot Transfer method, defined in wsrep_sst_method variable has been changed from mysqldump to rsync. New wsrep_reject_queries variable has been implemented that can be […]

Galera Flow Control in Percona XtraDB Cluster for MySQL

Last week at Percona Live, I delivered a six-hour tutorial about Percona XtraDB Cluster (PXC) for MySQL.  I actually had more material than I covered (by design), but one thing I regret we didn’t cover was Flow control.  So, I thought I’d write a post covering flow control because it is important to understand. What […]

MySQL Backup tools used by Percona Remote DBA for MySQL

As part of Percona Remote DBA for MySQL service we recognize that reliable backups are one of the most important things we can bring to the table. In my experience handling emergencies, the single worst thing that can happen is finding out you don’t have backups available when some sort of data loss or catastrophic […]

Best kept MySQLDump Secret

Many people use mysqldump –single-transaction to get consistent backup for their Innodb tables without making database read only. In most cases it works, but did you know there are some cases when you can get table entirely missing from the backup if you use this technique ? The problem comes from the fact how MySQL’s […]

Percona XtraDB Cluster Feature 1: High Availability

There and in coming posts I am going to cover main features of Percona XtraDB Cluster. The first feature is High Availability. But before jumping to HA, let’s review general architecture of the Percona XtraDB Cluster.

dbqp and Xtrabackup testing

So I’m back from the Percona dev team’s recent meeting.  While there, we spent a fair bit of time discussing Xtrabackup development.  One of our challenges is that as we add richer features to the tool, we need equivalent testing capabilities.  However, it seems a constant in the MySQL world that available QA tools often […]

Improved InnoDB fast index creation

One of the serious limitations in the fast index creation feature introduced in the InnoDB plugin is that it only works when indexes are explicitly created using ALTER TABLE or CREATE INDEX. Peter has already blogged about it before, here I’ll just briefly reiterate other cases that might benefit from that feature: when ALTER TABLE […]

InnoDB page sizes: plans and ideas

It is well known fact that InnoDB standard page size is 16K or 16384 bytes. Sometime ago we added feature to Percona Server to change that to 4K or 8K (innodb_page_size). That maybe useful for SSD that operates with 4K blocks and you can get really much better throughput with 4K ( however we need […]