Thank you for attending my July 15 webinar, “Creating Best in Class Backup solutions for your MySQL environment.” Due to the amount of content we discussed and some minor technical difficulties faced near the end of webinar we have decided to cover the final two slides of the presentation along with the questions asked by attendees during the webinar via this blog post.

The slides are available for download. And you can watch the webinar in it’s entirety here.

The final two slides were about our tips for having a …

Welcome to MySQL QA Episode 8: Reducing Testcases for Engineers: tuning reducer.sh

1. Advanced configurable variables & their default/vanilla reducer.sh settings
   1. FORCE_SKIPV
   2. FORCE_SPORADIC
   3. TIMEOUT_COMMAND & TIMEOUT_CHECK
   4. MULTI_THREADS
   5. MULTI_THREADS_INCREASE
   6. QUERYTIMEOUT
   7. STAGE1_LINES
   8. SKIPSTAGE
   9. FORCE_KILL
2. Some examples
   1. FORCE_SKIPV/FORCE_SPORADIC
   2. TIMEOUT_COMMAND/TIMEOUT_CHECK

Full-screen viewing @ 720p resolution recommended.

The post MySQL QA Episode 8: Reducing Testcases for Engineers: tuning reducer.sh …

Summary: My checklist for performing an in-place MySQL upgrade to 5.6. Details: In my previous post, I discussed the problem I had when doing an in-place MySQL upgrade from 5.5 to 5.6 when the database had been running with innodb_fast_checksum=1. … Continue reading →

I recently worked with a customer who had a weird issue: when their MySQL server was started (Percona Server 5.5), if they try to run service mysql start a second time, the init script was not able to detect that an instance was already running. As a result, it tried to start a second instance with the same settings as the first one. Of course this fails and this creates a mess. What was the issue? A missing rule in SELinux. At least it looks like

Summary

If SELinux is set to enforcing and if you are using Percona Server on CentOS/RHEL 6 (other versions could be affected), service mysql start doesn’t work properly and a fix is simple to run:

# grep mysqld_safe /var/log/audit/audit.log | audit2allow -M mysqld_safe
# semodule -i mysqld_safe.pp
# service mysql restart

Other options are:

• Set SELinux to permissive
• Use the CentOS/RHEL standard MySQL init script …

Morgan and I started an initiative a while back to improve the “out of the box” configuration and behavior defaults for MySQL. Working closely with the Community, we were able to come up with a good list of improvements. This work really began to bear fruit starting with the MySQL 5.7.7 release.…

My latest post is online on the Booking.com blog: Evaluating MySQL Parallel Replication Part 3: Benchmarks in Production.  In this post, I present benchmark results on MariaDB 10.0 parallel replication on four Booking.com production workloads.

This post is also the opportunity to promote my two talks at Percona Live Europe, taking place in Amsterdam from September 21 to 23:

Binlog Servers at

Continuing from our April 2015 release of the VMware Continuent 4.0 products is a new 4.0.1 release that provides important fixes to both the replication and MySQL clustering.For full details, read the full release notes, available at the links below, but the highlights are as follows: VMware Continuent for Replication and Data Warehousing

Expanded support for EBS Snapshots to enable MySQL table

Today Percona announced the immediate availability of 24/7, enterprise-class support for MongoDB and TokuMX. The new support service helps organizations achieve maximum application performance without database bloat. Customers have round-the-clock access (365 days a year) to the most trusted team of database experts in the open source community.

The news means that Percona now offers support across the entire open-source database ecosystem, including the entire LAMP stack (Linux, Apache, MySQL, and PHP/Python/Perl), providing a single, expert, proven service provider for companies to turn to in good times (always best to be proactive) – and during emergencies, too.

Today’s support announcement follows …

Welcome to MySQL QA Episode #7 – Reducing Testcases for Beginners: single-threaded reducer.sh!

In this episode we’ll learn how to use reducer.sh. Topics discussed;

1. reducer.sh introduction/concepts
2. Basic configurable variables & their default reducer.sh settings
   1. INPUTFILE options
   2. MODE=x
   3. TEXT=”text”
   4. WORKDIR_LOCATION & WORKDIR_M3_DIRECTORY
   5. MYEXTRA
   6. MYBASE
   7. PQUERY_MOD & PQUERY_LOC
   8. MODE5_COUNTTEXT, MODE5_ADDITIONAL_TEXT & MODE5_ADDITIONAL_COUNTTEXT
   9. How to learn more about each of the settings
3. Manual example
4. Introduction to the script’s self-recursion concept – subreducer
5. Quick setup re-cap, details of an already executed QA run
6. Examples from …

Before proceeding installation things , go through cluster basics from the MySQL website and forums. It will be helpful to easily understand installation and configuration. First time is difficult to get things to done in one shot is not possible , no problem will learn it .
MySQL Cluster Installation will be mostly done by two ways.,

1. Using binaries
2. rpm(Rethat,CentOS..,)

 Different Linux flavors has different methods to install format , here I have explaining with CentOS7 .

1.Have prepared two different machines to install MySQL Cluster . First you have to login two different machines

…