Read the original article at No tools to reconcile MySQL with two masters

Here’s the last nail in the coffin. We hope this convinces you not to write to multiple masters with MySQL replication. Reason 10 – No tools to reconcile inconsistent masters For all the endless reasons we’ve already outlined MySQL replication is prone to failure. We know it’s going to happen, you now know too. When [...]

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Read the original article at Temp tables can break replication

If you’re not convinced yet that writing to dual masters is a bad idea, we have a couple more reasons. 9. Temp tables break replication after restart MySQL’s replication is sensitive to temporary tables. You shouldn’t use them. If your queries create them to work against, and a node crashes, the temp tables will be [...]

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Read the original article at Crashed nodes corrupt your MySQL cluster

Writing to two masters is like walking around with a loaded shotgun. Eventually one of your instances will fail and when it does, replications position & synchronization information could easily become corrupt! Reason 8 – Crashed nodes cause big problems MySQL instances, unfortunately can crash. When that happens, they don’t always sync the replication position [...]

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Read the original article at Transaction isolation breaks when writing two masters

Continuing our discussion of multi-master replication, we hit on five more reasons why writing to two masters aka active-active replication is very dangerous. Click through to the end for multi-master solutions that work with MySQL. Reason 6 – You lose transaction isolation This may sound like a theoretical point to some. But hopefully we can [...]

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Read the original article at Active-active replication reduces operational flexibility

Among the myriad data integrity and corruption risks associated with active-active replication, you also lose out on configurability and operational flexibility. Reason 7 – Can’t add nodes easily The often touted solution to use auto_increment_increment and auto_increment_offset fixes you to a given setup forever. You can set it up with a discrete two nodes, all [...]

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Read the original article at How to make MySQL multi-master work for you

Coming soon! Want more? Grab our Scalable Startups monthly for more tips and special content. Here’s a sample Related posts:Transaction isolation breaks when writing two masters MySQL requires an authoritative master to build slaves MySQL needs single master to check data integrity A master isn’t born but made Why does MySQL replication fail?

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Read the original article at MySQL needs single master to check data integrity

MySQL slaves can drift out of sync. Many of our clients are surprised to find some data differences in their replication topology, once we do some checking and sniffing around. Such checks require a single reliable or authoritative master to compare against. Click through to the end for multi-master solutions that work with MySQL. Reason [...]

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Read the original article at MySQL requires an authoritative master to build slaves

In MySQL database operations, you often need to rebuild slaves. They fail for a lot of different reasons, fall out of sync or crash. When this happens you may find you need to reclone and start fresh. This is normally done by finding your authoritative master database, and doing a hotbackup. Click through to the [...]

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Read the original article at Limitations of MySQL row-based replication

MySQL offers a few different options for how you perform replication. Statement-based has been around a lot longer, and though it has some troublesome characteristics they’re known well and can be managed. What’s more it supports online schema changes with multi-master active-passive setup. We recommend this solution. Row-based replication is newer. It attempts to address [...]

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Read the original article at 10 reaons active-active is hard and how to solve it

Multi-master replication provides redundant copies of your most important business assets. What’s more it allows applications to scale out, which is perfect for cloud hosting solutions like Amazon Web Services. But when you decide you need to scale your write capacity, you may be considering active-active setup. This is dangerous, messy and prone to failure. [...]

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Read the original article at Why does MySQL replication fail?

When considering active-active multi-master, you must consider it’s foundation technology. Although MySQL replication is straightforward to setup, it can fail in a myriad of ways. Most of those are known and well understood. We can solve them only if we use the technology in the standard way. Click through to the end for multi-master solutions [...]

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Read the original article at Don’t Miss Percona Live 2013

The biggest event on the MySQL calendar is the yearly Percona Live and it’s just around the corner. This year you’ll be able to pick from a whopping 110 technical sessions by 90 different speakers from companies like Facebook, Amazon, Google and Linkedin. Learn what’s happening at the cutting edge of open source database deployments. [...]

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Read the original article at Cloud DBA and Management Interview

What does a cloud computing expert need to know? This is the last of a three part guide to interviewing for a cloud operations position. You can find them here – part one Operations Interview and part two Deployment Interview. Here’s my guide to do just that. 1. Database administration experience Although in some shops [...]

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Read the original article at Thoughts on Upcoming MySQL 5.6 Defaults

During Oracle Open World 2012 and the parallel MySQL Connect conference, the new 5.6 version was announced. It’s only release candidate right now, but that means the GA release is just around the corner. With that James Day has posted changes to various of the new parameter defaults. Many of them you may not run [...]

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Read the original article at 10 ways I avoid trouble in database operations

1. Avoid destructive commands From time to time I’m working with new recruits and bringing them up to speed in operations. The first thing I emphasize is care with destructive commands. What do I mean here? Well there are all sorts of them. SQL commands such as DROP table & DROP database. But also TRUNCATE [...]

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Read the original article at Why you should attend Percona Live 2012

What I loved about Percona Live 2011 Last year I was excited to go to Percona Live for the first time in NYC. I arrived just in time to hear Harrison Fisk from Facebook speak about some of the awesome tweaks they’re running with MySQL there. It’s not everyday that you get to hear from [...]

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Read the original article at 5 Things You Overlooked with MySQL Dumps

1. Point In Time Recovery If you’ve never done point in time recovery, it’s time to take a second look. With a standard mysqldump you restore your database to the time when the backup happened. Only do them once a day, then you can lose as much as 24 hours of data. Enter point-in-time recovery, [...]

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Read the original article at Oracle DBAs… You Know You Want MySQL!

If you’re an Oracle DBA or developer and considering migrating an application over to MySQL you probably have a lot of questions. Here’s a five minute summary of what you should know. Looking to hire a top flight MySQL DBA? Check out our MySQL interview guide. What is truly delicious o a command line that’s [...]

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Read the original article at Accidental DBA’s Guide to MySQL Management

So you’ve been tasked with managing the MySQL databases in your environment, but you’re not sure where to start.  Here’s the quick & dirty guide. Oh yeah, and for those who love our stuff, take a look to your right. See that subscribe button? Grab our newsletter!

1. Installation

The “yum” tool is your friend.  If you’re using debian, you’ll use apt-get but it’s very similar. You can do a “yum list” to see what packages are available. We prefer to use the Percona distribution of

Read the original article at RDS or MySQL – Ten Use Cases

Amazon’s Relational Database Service is based on MySQL under the hood.  So many colleagues and clients ask me – should I go with RDS or MySQL? As with every technology question, the answer is – it depends.

Here are some scenarios to help you decide.

A: This setup is common if you’re using Amazon’s VPC or Virtual Private Cloud.  With a router dropped into your datacenter, VPC allows you to extend and spinup virtual instances from Amazon as if they’re sitting in your own existing datacenter.  Great stuff, but you won’t be able to replicate from your existing

Read the original article at Best of Guide – Highlights of Our Popular Content

We cherry pick the top 5 most popular posts of various topics we’ve covered in recent months.

• 5 Things Toxic to Scalability

We use a broad brush to highlight the biggest no-nos in web application scalability.

• 5 Ways to Boost Scalability for MySQL

We dig into scalability, steering to the richest areas to focus on.

• 8 Best Practices for Deploying MySQL

Read the original article at Ten things to remember about MySQL backups

Hot backups are an excellent way to backup MySQL.  They can run without blocking your application, and save tons on restore time.  Percona’s xtrabackup tool is a great way to do this.  We wrote a how-to on using xtrabackup for hotbackups.

Just because we love hot backups using xtrabackup doesn’t mean mysqldump isn’t useful.  Want to load data into Amazon RDS?  Want to isolate and load only one schema, or just

MySQL is the world’s most popular open-source database and platform for millions of web applications – it’s critical but cumbersome to monitor.

Monitis’ MySQL monitoring provides three key benefits:

Insight
» 246 potential monitoring variables
» 21 aggregated, percentage-based metrics
» Adjustable thresholds to separate real issues from false alarms

Control

» Monitor entire IT universe from one dashboard
» Quick diagnosis & root cause detection

Simplicity
» Cloud-based means no need to install, update or maintain it
» Leaves you time to focus on more important things

For a FREE trial, go to:

https://www.monitis.com/free_signup.jsp

New feature provides significantly faster insight and root cause analysis

SAN JOSE, Calif., February, 15, 2012 – Monitis, the leading cloud and web application monitoring software provider, today announces that it has added comprehensive MySQL database monitoring to its award-winning Application Performance Management & Monitoring platform. The robust Software-as-a-Service (SaaS) tool enables users to gain significantly faster insight when conducting root cause analysis.

The MySQL monitoring feature includes 246 monitoring variables and more than 21 different metrics to provide one of the easiest to use, yet comprehensive database monitoring tools

Pluggable M3 (Monitis Monitor Manager) Framework

Who needs an introduction about M3? – Perhaps no one!
After gaining some reputation with M3, providing extra-easy integration of any monitor into Monitis it was time to take it to the next level.

Generally speaking, the work flow of M3 was described in detail in this article.

After some thought and design, we’ve decided it’d be best if M3 was pluggable. Pluggable in terms of being able to easily add execution and parsing plugins.
The interface and

Read the original article at The Mythical MySQL DBA

I’ve  been getting more than my fair share of calls from recruiters of late. Even in this depressed economic climate where jobs are rarer than a cab at rush-hour, it’s heartening to know that tech engineers are in great demand. And it’s even more heartening to think that demand for MySQL DBAs has never been better.

My reckoning was confirmed by a Bloomberg news report about stalwart retailers suffering from a dearth of talented engineers. Bloomberg cited Target’s outage-prone e-commerce site as a symptom of, among other things the market’s shortage. One of the challenges old-timers like Target face is having to compete with Silicon Valley startups

Read the original article at Book Review – Effective MySQL

Effective MySQL: Optimizing SQL Statements by Ronald Bradford No Nonsense, Readable, Practical, and Compact I like that this book is small; 150 pages means you can carry it easily.  It’s also very no nonsense.  It does not dig too deeply into theory unless it directly relates to your day-to-day needs.  And those needs probably cluster [...]

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Linux, Apache, MySQL and PHP — altogether they mean LAMP. I’m not talking about watts and bulbs.

And if you desire is for a comprehensive, robust server, your IT infrastructure has to include all of these systems.

Monitis has put together a checklist of 101 actions you can take to maximize security around LAMP.  Hopefully we’re shedding a little light around this issue for you to give you some new ideas on how to make administering your system easier — so that, in turn, you can focus on more strategic

Join me for a webinar where I discuss how the recent changes and trends in big data management effect the enterprise.  This event is sponsored by Red Rock and RockSolid.

Overview:

It is an exciting and interesting time to be involved in data. More change of influence has occurred in the database management in the last 18 months than has occurred in the last 18 years. New technologies such as NoSQL & Hadoop and radical redesigns of existing technologies, like NewSQL , will change dramatically how we manage data moving forward. 

These technologies bring with them possibilities both in terms of the scale of data