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MySQL Router HA with Pacemaker

This article will explain how to setup HA for MySQL Router as described in a previous article about where should the router stand. For this setup, I will use Pacemaker (part of RedHat High Availability Add-on and available on RHEL, CentOS, Oracle Linux, …). Of course we need a MySQL InnoDB Cluster but we won’t really use it for the … Read More

How to migrate from Galera Cluster to MySQL Group Replication

In this article, I will show you how it’s possible to perform an online migration from a 3 members Galera cluster setup (in this case I’m using PXC 5.7.14) to a 3 members MySQL Group Replication cluster setup (MySQL Community 5.7.17). Don’t forget that before adopting Group Replication as database backend, you should validate that your application do match GR … Read More

faker rpm: InnoDB fake changes based replication prefetcher

I wanted to speed up a slave using Percona’s InnoDB fake change feature, so I decided to use Facebook’s prefetcher called faker.

As I needed to compile it, with just some more minutes I could create a rpm package. So here is the RPM for CentOS 6.x 64bit.


Backport of Percona Audit Plugin

Since yesterday, the new Percona Server (5.5.37-35.0) includes an audit plugin.

This is the announcement on mysqlperformance blog.

I needed to have this feature for a customer running an older version of Percona Server (5.5.33-31.1), so I back ported the plugin (revision 654) removing some extra info that is not available on previous version of Percona Server.

The information above in struct mysql_event_general (include/mysql/plugin_audit.h) were not yet present:

MYSQL_LEX_STRING general_host;
MYSQL_LEX_STRING general_sql_command;
MYSQL_LEX_STRING general_external_user;
MYSQL_LEX_STRING general_ip;

Additionally, as I needed to parse the audit log quickly, I added a new format (CSV) to replace both implementation of XML output (OLD & NEW).

This is an example of the new output:

AUDIT_RECORD - Audit::35531_2014-05-07T06:15:32::2014-05-07T06:15:36 UTC::5.5.33-31.1::--basedir=/usr --datadir=/var/lib/mysql --plugin-dir=/usr/lib64/mysql/plugin --user=mysql --log-error=/var/lib/mysql/percona1.err --pid-file=/var/lib/mysql/percona1.pid::x86_64-Linux AUDIT_RECORD - Connect,35532_2014-05-07T06:15:32,2014-05-07T06:16:04 UTC,1,0,root,root,,,localhost, AUDIT_RECORD - Query::35533_2014-05-07T06:15:32::2014-05-07T06:16:04 UTC::1::0::select @@version_comment limit 1::root[root] @ localhost [] AUDIT_RECORD - Query::35534_2014-05-07T06:15:32::2014-05-07T06:16:20 UTC::1::0::SELECT DATABASE()::root[root] @ localhost [] AUDIT_RECORD - Init DB::35535_2014-05-07T06:15:32::2014-05-07T06:16:20 UTC::1::0::(null)::root[root] @ localhost [] AUDIT_RECORD - Query::35536_2014-05-07T06:15:32::2014-05-07T06:16:20 UTC::1::0::show databases::root[root] @ localhost [] AUDIT_RECORD - Query::35537_2014-05-07T06:15:32::2014-05-07T06:16:20 UTC::1::0::show tables::root[root] @ localhost [] AUDIT_RECORD - Field List::35538_2014-05-07T06:15:32::2014-05-07T06:16:20 UTC::1::0::::root[root] @ localhost [] AUDIT_RECORD - Field List::35539_2014-05-07T06:15:32::2014-05-07T06:16:20 UTC::1::0::::root[root] @ localhost [] AUDIT_RECORD - Query::35540_2014-05-07T06:15:32::2014-05-07T06:16:23 UTC::1::0::show databases::root[root] @ localhost [] AUDIT_RECORD - Query::35541_2014-05-07T06:15:32::2014-05-07T06:16:27 UTC::1::0::SELECT DATABASE()::root[root] @ localhost [] AUDIT_RECORD - Init DB::35542_2014-05-07T06:15:32::2014-05-07T06:16:27 UTC::1::0::(null)::root[root] @ localhost [] AUDIT_RECORD - Query::35543_2014-05-07T06:15:32::2014-05-07T06:16:29 UTC::1::0::show tables::root[root] @ localhost [] AUDIT_RECORD - Query::35544_2014-05-07T06:15:32::2014-05-07T06:16:34 UTC::1::0::select * from t::root[root] @ localhost []

The patch is available below and the compiled plugin for Centos 6 x86_64 for Percona Server 5.5.33-rel31.

Update: I’ve now added the code in launchpad and changed the default audit format to CVS, so the first time the plugin is loaded, CVS is used and no need to restart mysqld to enable CVS.

golden cage’s phone supported in Fedora 20

If you want to be able to use an iPhone with Fedora 20 to copy photos or songs, you will need to upgrade libimobiledevice to 1.1.6. If you don’t on the phone you will be constantly prompted to trust or not the computer:

You can find the rpms for libimobiledevice 1.1.6 here.