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Displaying posts with tag: ha (reset)

MariaDB Galera Cluster is a unique technology worth testing
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As alway with new technology there is always different approaches regarding the adoption. You can try to use the bleeding edge features or start with a very standard configuration. My personal advise to new users is to start with the most basic configuration.

This allow you to get familiar with the fundamentals : - how [...]

MySQL 5.6 Replication Webinar
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Update – the recording of this webinar is now available here.

This Wednesday (27th March) Mat Keep and I will be presenting a free, live webinar on MySQL 5.6 Replication. You need to register here (http://www.mysql.com/news-and-events/web-seminars/mysql-5-6-replication-enabling-next-generation-of-web-mobile-social-and-cloud-services/" target="_blank) ahead of the webinar – worth doing even if you can’t attend as you’ll then be sent a link to the replay when it’s available. We’ll also have some of the key MySQL replication developers

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MySQL 5.6 Replication: New Resources for Database Scaling and HA
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MySQL 5.6 reached GA (General Availability) today and is packed with a wealth of new features and capabilities.  Exciting stuff!
MySQL 5.6 also introduces the largest set of enhancements to replication ever delivered in a single release, including: - 5x higher performance to improve consistency across a cluster and reduce the risks of data loss in the event of a master failing - Self-healing clusters with automatic failover and recovery from outages or planned maintenance - Assured data integrity with checksums implemented across the replication workflow - DevOps automation
Of course, getting started with all of these enhancements can be a challenge - whether you are new to MySQL replication or an experienced user. So two new Guides are available to help take advantage of

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Deep Dive into GTIDs and MySQL 5.6 - What, Why and How
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Global Transaction Identifiers (GTIDs) are one of the key replication enhancements in MySQL 5.6. GTIDs make it simple to track and compare replication across a master - slave topology. This enables:

- Much simpler recovery from failures of the master,

- Introduces great flexibility in the provisioning and on-going management of multi-tier or ring (circular) replication topologies.

A new on-demand MySQL 5.6 GTID webinar (http://www.mysql.com/news-and-events/web-seminars/mysql-replication-simplifying-scaling-and-ha-with-gtids/) delivered by the replication engineering team is now available, providing deep insight into the design and implementation of GTIDs, and how they enable users to simplify MySQL scaling and HA. The webinar covers:

- Concepts: What is

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Overwhelming response from the MySQL community in Barcelona
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Within hours of my post about meeting the MySQL community in Barcelona, we got several offers to help, and within one day, an event was created and agreed upon.

Thanks!

Today the event was posted at Evenbrite. It will take place on Tuesday, November 13th, at 7pm. It will be a one hour talk about State of the art in MySQL high availability and replication, followed by one hour of Q&A, networking, beer, and snacks.

Registration is necessary, because the seats are limited. If you want to attend, you should register as soon as possible!

New Options for MySQL High Availability
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Data is the currency of today’s web, mobile, social, enterprise and cloud applications. Ensuring data is always available is a top priority for any organization – minutes of downtime will result in significant loss of revenue and reputation.

There is not a “one size fits all” approach to delivering High Availability (HA). Unique application attributes, business requirements, operational capabilities and legacy infrastructure can all influence HA technology selection. And then technology is only one element in delivering HA – “People and Processes” are just as critical as the technology itself.

For this reason, MySQL Enterprise Edition (http://www.mysql.com/products/enterprise/) is available supporting a range of HA solutions, fully certified and supported by Oracle. MySQL Enterprise HA

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MySQL now provides support for DRBD
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Oracle has announced that it now provides support for DRBD with MySQL – this means a single point of support for the entire MySQL/DRBD/Pacemaker/Corosync/Linux stack! As part of this, we’ve released a new white paper which steps you through everything you need to do to configure this High Availability stack (http://www.mysql.com/why-mysql/white-papers/mysql_wp_drbd.php). The white paper provides a step-by-step guide to installing, configuring, provisioning and testing the complete MySQL and DRBD stack, including:

  • MySQL Database
  • DRBD kernel module and userland utilities
  • Pacemaker and Corosync cluster messaging and management processes
  • Oracle Linux operating system

DRBD is an extremely popular way of adding a layer of High

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Replication and auto-failover made easy with MySQL Utilities
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If you’re a user of MySQL Workbench then you may have noticed a pocket knife icon appear in the top right hand corner – click on that and a terminal opens which gives you access to the MySQL utilities. In this post I’m focussing on the replication utilities but you can also refer to the full MySQL Utilities documentation.

What I’ll step through is how to uses these utilities to:

  • Set up replication from a single master to multiple slaves
  • Automatically detect the failure of the master and promote one of the slaves to be the new master
  • Introduce the old master back into the topology as a new slave and
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MySQL Connect 8 Days Away - Replication Sessions
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Following on from my post about MySQL Cluster sessions at the forthcoming Connect conference, its now the turn of MySQL Replication - another technology at the heart of scaling and high availability for MySQL.

Unless you've only just returned from a 6-month alien abduction, you will know that MySQL 5.6 includes the largest set of replication enhancements ever packaged into a single new release:

- Global Transaction IDs + HA utilities for self-healing cluster..(yes both automatic failover and manual switchover available!)

- Crash-safe slaves and binlog

- Binlog Group Commit and Multi-Threaded Slaves for high

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Automated MySQL Master Failover
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After the GitHub MySQL Failover incident a lot of blogs/people have explained that fully automated failover might not be the most optimal solution.

Fully automated failover is indeed dangerous, and should  be avoided if possible. But a complete manual failover is also dangerous. A fully automated manually triggered failover is probably a better solution.

A synchronous replication solution is also not a complete solution. A split-brain situation is a good example of a failure which could happen. Of course most clusters have all kinds of safe guard to prevent that, but unfortunately also safe guards can fail.

Every failover/cluster should be considered broken unless:
  • You've tested the failover scripts and procedures
  • You've tested the failover scripts and procedures under normal load
  • You've tested the failover scripts







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    10 Newer Entries Showing entries 31 to 40 of 124 10 Older Entries

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