The content of this article is outdated, look here for more up to date information. Over the last year, the frustration of many of us at Percona regarding issues with MMM has grown to a level where we started looking at other ways of achieving higher availability using MySQL replication. One of the weakness of [...]
Percona Replication Manager, a solution for MySQL high availability with replication using Pacemaker
November 29, 2011 By 102 Comments
Shard-Query EC2 images available
May 11, 2011 By 2 Comments
Infobright and InnoDB AMI images are now available There are now demonstration AMI images for Shard-Query. Each image comes pre-loaded with the data used in the previous Shard-Query blog post. The data in the each image is split into 20 “shards”. This blog post will refer to an EC2 instances as a node from here [...]
Percona XtraBackup 1.6
April 12, 2011 By 15 Comments
Percona XtraBackup 1.6 is now available for download and is the current stable release version of XtraBackup.
More on MySQL Error Messages
April 6, 2011 By 9 Comments
I wrote about MySQL Error Messages before and as you might guess I’m not very happy with quality for error messages it produces. Now I’m revisiting this subject with couple of more annoying examples I ran into during last couple of days.
1 2 | mysql> drop database test; ERROR 1010 (HY000): Error dropping database (can't rmdir './test/', errno: 17) |
Using Flexviews – part two, change data capture
March 25, 2011 By 26 Comments
In my previous post I introduced materialized view concepts. This post begins with an introduction to change data capture technology and describes some of the ways in which it can be leveraged for your benefit. This is followed by a description of FlexCDC, the change data capture tool included with Flexviews. It continues with an [...]
How Percona diagnoses MySQL server stalls
March 3, 2011 By 6 Comments
We receive many requests for help with server stalls. They come under various names: lockup, freeze, sudden slowdown. When something happens only once or twice a day, it can be difficult to catch it in action. Unfortunately, this often leads to trial-and-error approaches, which can drag on for days (or even months), and cause a [...]
Why you can’t rely on a replica for disaster recovery
July 31, 2010 By 25 Comments
A couple of weeks ago one of my colleagues and I worked on a data corruption case that reminded me that sometimes people make unsafe assumptions without knowing it. This one involved SAN snapshotting that was unsafe. In a nutshell, the client used SAN block-level replication to maintain a standby/failover MySQL system, and there was [...]
xtrabackup-0.9.5rc
October 24, 2009 By 13 Comments
Dear Community, As of today release 0.9.5rc is available. In this release there are following changes: Changelog: Option –no-lock is added to innobackupex-1.5.1. Use it only while ALL your tables are InnoDB and you DO NOT CARE about binary log position of backup XtraBackup is ported for InnoDB Plugin 1.0.4. Barracuda file format as well [...]
xtrabackup-0.5, bugfixes, incremental backup introduction
April 7, 2009 By 6 Comments
I am happy to announce next build of our backup tool. This version contains several bugfixes and introduces initial implementation of incremental backup. Incremental backup works in next way. When you do regular backup, at the end of procedure you can see output:
1 2 3 4 5 6 7 8 9 10 | The latest check point (for incremental): '1319:813219999' >> log scanned up to (1319 813701532) Transaction log of lsn (1318 3034677302) to (1319 813701532) was copied. 090404 06:03:29 innobackupex: All tables unlocked 090404 06:03:29 innobackupex: Connection to database server closed innobackupex: Backup created in directory '/mnt/data/tmp' innobackupex: MySQL binlog position: filename 'db02-bin.001271', position 247627478 090404 06:07:58 innobackupex: innobackup completed OK! innobackupex: You must use -i (--ignore-zeros) option for extraction of the tar stream. |
which gives start point 1319:813219999 for further incremental backup. This point [...]
Living with backups
November 6, 2008 By 28 Comments
Everyone does backups. Usually it’s some nightly batch job that just dumps all MySQL tables into a text file or ordinarily copies the binary files from the data directory to a safe location. Obviously both ways involve much more complex operations than it would seem by my last sentence, but it is not important right [...]
