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Last week, the Linux-HA project made its Heartbeat 3.0.4 and Cluster Glue 1.0.7 release, and Pacemaker released 1.0.10 a few weeks back. Thanks to the amazing Simon Horman (
horms to IRC regulars), those releases have been uploaded to Debian unstable (
sid is the permanent code name of the Debian unstable distribution. It’s where package maintainers upload fresh builds and maintain the latest versions of distribution packages. It’s not meant for general
There has been a lot happening in the MariaDB community recently, and there has been growth. Here are some of the highlights. Thank you to all our current contributors, and to others that want to contribute, shoot community[at]askmonty[dot]org an e-mail.
MariaDB 5.2.3 binaries for Solaris and Debian Sparc
Our Sparc community contributor, Mark, has continued to make popular binaries for Solaris 10 and Debian Sparc. He’s kept up to speed with MariaDB 5.2.3, so please visit him and download the binaries.
MariaDB 5.2.3 on the openSUSE Build Service
Community contributor Michal Hrušecký has packaged MariaDB for openSUSE and its available via the[Read more...]
Today I will describe the setup of a Hadoop / HDSF multi-node cluster on Debian Lenny with a redundant Namenode using DRBD and Heartbeat, four Datanodes and Tasktracker, a Backup- Checkpointnode and Rack awareness.Hadoop Cluster Setup on Debian Lenny purposes
This article descibes how to setup a hadoop (version 0.21.0) cluster on debian lenny (version 5.x). I will not describe how to use MapReduce.general
Hadoop is a framework for distributed computing written in Java. The project includs the following subprojects:
How To Set Up MySQL Database Replication With SSL Encryption On Debian Lenny
This tutorial describes how to set up database replication in MySQL using an SSL connection for encryption (to make it impossible for hackers to sniff out passwords and data transferred between the master and slave). MySQL replication allows you to have an exact copy of a database from a master server on another server (slave), and all updates to the database on the master server are immediately replicated to the database on the slave server so that both databases are in sync. This is not a backup policy because an accidentally issued DELETE command will also be carried out on the slave; but replication can help protect against hardware failures though.
Installing A Web, Email And MySQL Database Cluster (Mirror) On Debian 5.0 With ISPConfig 3
This tutorial describes the installation of a clustered Web, Email, Database and DNS server to be used for redundancy, high availability and load balancing on Debian 5 with the ISPConfig 3 control panel. GlusterFS will be used to mirror the data between the servers and ISPConfig for mirroring the configuration files. I will use a setup of two servers here for demonstration purposes but the setup can scale to a higher number of servers with only minor modifications in the GlusterFS configuration files.
A couple of new webinar recordings are available from our web site:
Like our live webinars, the recordings are of course free of charge. Enjoy!
Apache And MySQL Monitoring With Bijk On Debian Lenny
This tutorial describes how you can monitor your server with the tool Bijk. Bijk creates online 30 graphs about load, CPU, memory, traffic, Apache, NginX, PostreSQL and others with alerts. Bijk can be used on Debian, Ubuntu, CentOS, RedHat and Gentoo. In this article I will explain how to install Bijk on Debian.
Martin Loschwitz, the longest-serving Debian Developer in our ranks, will present a walk-through of going from Linux clustering on Debian lenny (with Heartbeat 2.1.3, shudder) to squeeze (with Heartbeat 3 and Pacemaker). In this webinar you will learn everything you need to know about a painless migration to the new Linux cluster stack.
This webinar will be held on Monday, June 7, at 1400 UTC. You must provide a valid email address to receive a meeting key. Register below!
The widget should
Sphinx As MySQL Storage Engine (SphinxSE)
SphinX is a great full-text search engine for MySQL. Installing the Sphinx daemon was straightforward as you can compile it from the source or use a .DEB/.RPM package but SphinxSE was a little bit tricky since it needed to be installed as a plugin on a running MySQL server. So if you use Debian or Centos and install your MySQL from a .deb or .rpm package this is how you do it.
The full Linux cluster stack, including Pacemaker, Heartbeat, Corosync and related packages, cleared all hurdles and migrated to the Debian testing repository this morning. This means that Pacemaker and both messaging layers it supports will be in the upcoming Debian release, codenamed squeeze.[Read more...]
Thanks to the efforts of the Debian HA Maintainers team, the complete Pacemaker cluster stack is now available in Debian GNU/Linux. Packages are currently included only in Debian unstable (“sid“), but we expect them to make their way into squeeze (and lenny, via backports.org) relatively soon.
See the following links in the Debian package database for details:[Read more...]
It started with Brian Evans’ github repository, some good instructions on the mailing list for Building MariaDB on Gentoo, to a request for packaging, and guess what? Its now officially in Gentoo! Thanks Brian, and Robin Johnson!
Today I ran into my first MySQL binlog race condition: The initial problem was quite simple: A typical MySQL master->slave setup with heavy load on the master and nearly no load on the slave, which only serves as a hot fallback and job machine, showed differences on the same table on both machines. The differences showed up from time to time: entries that have been deleted from the master were still on the slave.
After several investigations I started examining the MySQL binlog from the master – a file containing all queries that will be transferred to the slave (and executed there if they don’t match any ignore-db-pattern). I grepped for ids of rows that have not been deleted on the slave as I’s interested if the DELETE statement was[Read more...]
The aims of this kind of blog post is simple – I want to help keep the masses informed as to what’s happening with MariaDB, as a whole. There is a community growing, and MariaDB is a community project, not necessarily a Monty Program Ab baby (and we’re clear on this distinction: think of it like Canonical/Ubuntu). So, think of it as such that I’m sharing the good news, and summarising what’s been happening, to save you time.
MariaDB added to the Debian/Ubuntu wishlists
One of MariaDB’s goals is that it should be easily available for download. While we provide binaries and source at
How To Back Up MySQL Databases With mylvmbackup On Debian Lenny
mylvmbackup is a Perl script for quickly creating MySQL backups. It uses LVM's snapshot feature to do so. To perform a backup, mylvmbackup obtains a read lock on all tables and flushes all server caches to disk, creates a snapshot of the volume containing the MySQL data directory, and unlocks the tables again. This article shows how to use it on a Debian Lenny server.
One of the things that I am really happy about in MariaDB is that we have our releases available as apt (and yum for Centos) repositories. This is largely thanks to being able to build this on the OurDelta package build infrastructure (which again builds on things like the Debian packaging scripts for MySQL).
Something like the Debian
apt-get package system (which is also
used by Ubuntu) is one of the major innovations in the Free Software world in
my opinion. Debian has spent many years refining this system to where it is
today. Want to run the mysql client, but it isn't installed? Just try to run
it on your local Ubuntu host:
$ mysql The program 'mysql' can be found in the following packages: * mysql-client-5.0 * mysql-client-5.1 Try: sudo apt-get install <selected package> -bash: mysql:[Read more...]
DRBD has entered a new phase. After being developed out of tree for 9 years, and after an extended review and streamlining phase since March, Phil submitted DRBD to be merged into 2.6.32 release of the Linux mainline kernel. The submission was accepted by block layer maintainer Jens Axboe, who merged DRBD in September, then deferred to the 2.6.33 merge window, and this morning Linus[Read more...]
(note: give the mirrors some hours to sync up)
MySQL 5.0.87-d10 OurDelta builds are now available (32 and 64-bit):
Debian Linux (the underlying foundation of Ubuntu) manages the startup/shutdown of MySQL quite differently from the ways I am used to. I am a long-time user of both the MySQL binary provided by Red Hat/SuSE (along with Fedora and clones like CentOS and Oracle Enterprise Linux) and the official binary from mysql.com (http://www.mysql.com). After the successful restore of a cold backup, I started
mysqld using the Debian provided init script. The script said that
mysqld failed to start up, but in reality it did start up. Similarly, stopping
The output below demonstrates the outputs and the behavior seen on a Ubuntu 8.04 LTS Server:
root:~# ps -ef | grep mysqld root 20165 19926 0 15:12 pts/4 00:00:00 grep mysqld root:~# /etc/init.d/mysql start * Starting MySQL database server mysqld[Read more...]
Installing Cherokee With PHP5 And MySQL Support On Debian Lenny
Cherokee is a very fast, flexible and easy to configure Web Server. It supports the widespread technologies nowadays: FastCGI, SCGI, PHP, CGI, TLS and SSL encrypted connections, virtual hosts, authentication, on the fly encoding, load balancing, Apache compatible log files, and much more. This tutorial shows how you can install Cherokee on a Debian Lenny server with PHP5 support (through FastCGI) and MySQL support.
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