MySQL Fabric is a new framework that adds High Availability (HA) and/or scaling-out for MySQL. This is the second in a series of posts on the new MySQL Fabric framework; the first article (MySQL Fabric – adding High Availability to MySQL) explained how MySQL Fabric can deliver HA and then stepped through all of the steps to configure and use it.

This post focuses on using MySQL Fabric to scale out both reads and writes across multiple MySQL Servers. It starts with an introduction to scaling out (by partitioning/sharding data) and how MySQL Fabric achieves it before going on to work through a full example of configuring sharding across a farm of MySQL Servers together with the code that the application developer needs to …

In my previous post I’ve showed some new MySQL 5.6 features which can be very helpful when creating geo-enabled applications. In this post I will show how we can obtain open-source GIS data, convert it to MySQL and use it in our GEO-enabled applications. I will also present at the upcoming Percona Live conference on this topic.

Data sources (US)

For the U.S. we may look at 2 major data sources:

1. ZIP codes with latitude, longitude and zip code boundaries (polygon). This can be downloaded from the U.S. Census website: …

To create dynamic web pages, you can use PHP, a server-side, HTML-embedded scripting language. PHP is available for most operating systems and can access the MySQL database. PHP provides MySQL API extensions, MySQL Improved Extension and MySQL Functions.

To learn more about using MySQL and PHP, you can consult the MySQL and PHP reference manual. You can also take the MySQL and PHP: Developing Dynamic WebApplications training course.

Through a hands-on approach, this 4-day instructor-led course …

I needed to test the new server audit plug-in on latest MariaDB 10.0.9
More info about that handy plug in you may find here : http://www.skysql.com/downloads/mariadb-audit-plugin
Take a moment to read the info, along with that nice blog : http://www.skysql.com/blogs/ralf-gebhardt/activating-auditing-mariadb-and-mysql-5-minutes

In short:

root@mariadb-10.0.9:[Mon Mar 24 07:51:54][/tmp/]$ lftp http://ftp.igh.cnrs.fr/pub/mariadb/mariadb-10.0.9/yum/
cd ok, cwd=/pub/mariadb/mariadb-10.0.9/yum                                   
lftp ftp.igh.cnrs.fr:/pub/mariadb/mariadb-10.0.9/yum> bookmark add mariadb-10.0.9
lftp ftp.igh.cnrs.fr:/pub/mariadb/mariadb-10.0.9/yum> ls
drwxr-xr-x  --  ..                   
drwxr-xr-x            - …

I will be presenting at Percona Live 2014 and I’m excited to share and discuss the latest and greatest features and improvements that we have made to MySQL/InnoDB in 5.7. Great performance improvements, there are some new exciting compression features that we are working on,  GIS support,  temporary table performance etc.. There is a long list. Also, we are always interested to hear about user issues and priorities so that we can address them and/or work them into our plan. Your feedback is very important for us, if you want to influence the direction of InnoDB development then you need to talk to me .

I will be speaking about High Performance Rails with MySQL on RubyConfPH. If you use Ruby on Rails with MySQL and in Manila on March 28-29, you should register for the event!

Background

Eventual consistency is a consistency model used in many large distributed databases which requires that all changes to a replicated piece of data eventually reach all affected replicas; conflict resolution is not handled and responsibility is pushed up to the application author in the event of conflicting updates [13].

Eventual consistency is a specific form of weak consistency; the storage system guarantees that if no new updates are made to the object, eventually all accesses will return the last updated value [14]. If no failures occur, the maximum size of the inconsistency window can be determined based on factors such as communication delays, the load on the system, and the number of replicas involved in the replication scheme [3].

A few examples of eventually consistent systems:

• DNS
• Asynchronous master/slave replication on an RDBMS e.g. MariaDB
• memcached in front …

While installing mysql-workbench-community-6.0.9 on Ubuntu 13.04 if you get below error.

root@Dell-XPS:/home/nilnandan/Downloads# dpkg -i mysql-workbench-community-6.0.9-1ubu1204-amd64.deb
Selecting previously unselected package mysql-workbench-community.
(Reading database … 203112 files and directories currently installed.)
Unpacking mysql-workbench-community (from mysql-workbench-community-6.0.9-1ubu1204-amd64.deb) …
dpkg: dependency problems prevent configuration of mysql-workbench-community:
 mysql-workbench-community depends on libctemplate0; however:
  Package libctemplate0 is not installed.
 mysql-workbench-community depends on libgtkmm-2.4-1c2a (>= 1:2.24.0); however:
  Package libgtkmm-2.4-1c2a is not installed.
…

Percona is glad to announce the release of Percona Monitoring Plugins 1.1.3.

Changelog:

* Introduced more secure location of PHP script configs to harden a Cacti setup
* Addressed CVE-2014-2569

We have introduced a more secure location /etc/cacti/ for PHP script configs. Earlier, the only way was to keep .php.cnf configs inside of scripts/ folder which falls under the web directory of Cacti setup, thus provides a potential security vulnerability. We strongly recommend to move all .php.cnf files from /usr/share/cacti/scripts/ to /etc/cacti/ and also harden your Cacti setup.

A new tarball is available from …

Percona Toolkit has a great tool, pt-query-digest, that can use tcpdump data. Capturing raw tcp data can be taxing on a server, however, when you see the following message:

64000 packets received by filter
12000 packets dropped by kernel

When there is a significant amount of user cpu% being used, the kernel will drop packets you are trying to capture, leading to a partial picture and missing data. I’ve found that if you write it using the native tcpdump format, it’s more efficient and you drop less. There are also recommendations on Stack Overflow on how to help prevent this.

To perform a capture for a specific length of time, here’s the trick I …