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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1. Transaction isolation breaks when writing two masters
2. MySQL requires an authoritative master to build slaves
3. MySQL needs single master to check data integrity
4. Limitations of MySQL row-based replication
5. Crashed nodes corrupt your MySQL cluster

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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1. Why does MySQL replication fail?
2. Active-active replication reduces operational flexibility
3. 5 Ways to fortify MySQL replication
4. Crashed nodes corrupt your MySQL cluster
5. Bulletproofing MySQL replication with checksums

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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1. MySQL Cluster In The Cloud – Managers Guide
2. Active-active replication reduces operational flexibility
3. Why does MySQL replication fail?
4. MySQL requires an authoritative master to build slaves
5. MySQL needs single master to check data integrity

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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1. Why does MySQL replication fail?
2. Database Replication – What is it and why is it important?
3. When You’re Hired to Solve a People Problem
4. How To Build Highly Scalable Web Applications For The Cloud
5. 3 Ways to Boost Cloud Scalability

Read the original article at The Art of Resistance

Sometimes, you have to be the bad guy. Be resistant to change. Here’s a story about how stubbornness pays off. As we’ve written about before A 4 letter word divides Dev & Ops. I had one experience working as the primary MySQL DBA for an internet startup. Turns out they had Oracle for some applications [...]

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Read the original article at A History lesson for Cloud Detractors

We’ve all seen cloud computing discussed ad nauseam on blogs, on Twitter, Quora, Stack Exchange, your mom’s Facebook page… you get the idea. The tech bloggers and performance experts often pipe in with their graphs and statistics showing clearly that dollar-for-dollar, cloud hosted virtual servers can’t compete with physical servers in performance, so why is [...]

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1. Migrating to the Cloud – Why and why not?
2. 4 Considerations Migrating to The Cloud
3. Cloud Computing – What is it and why is it important?
4. The New Commodity Hardware Craze aka Cloud Computing
5. Cloud Computing – Disciplined Deployments

Read the original article at What Ops doesn’t tell you about your MySQL Database

MySQL is a very scalable platform which has proven robust even in the most dense and complex data environments. MySQL’s indispensable replication function is ‘sold’ as being fail-safe so you have little to sweat about as long as your backups are running regularly. But what the ops guys aren’t telling you is MySQL performs replication [...]

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1. Database Replication – What is it and why is it important?
2. 3 Biggest MySQL Migration Surprises
3. 7 Ways to Troubleshoot MySQL
4. Semi-Synchronous Replication – What is it and why is it important?
5. Backup and Recovery in EC2 – 5 Point Checklist

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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1. 3 Biggest MySQL Migration Surprises
2. 5 Ways to Boost MySQL Scalability
3. Book Review – Rework
4. Book Review – Help! by Oliver Burkeman
5. Migration to MySQL – What is it and why is it important?

Read the original article at Oracle Announces Paid MySQL Add-ons

 Oracle starts charging for MySQL Add-ons Exciting news, Oracle just announced commercial MySQL extensions that they’ll be offering paid extensions to the core MySQL free product. To be sure, this has raised waves of concern among the community, but on the whole I suspect it will be a good thing for MySQL.  This brings more commercial [...]

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1. Migrating MySQL to Oracle Guide
2. Oracle to MySQL Migration Considerations
3. Migrating MySQL to Oracle
4. Emergency Oracle Support
5. Oracle Expert – New York City

Read the original article at 3 Biggest MySQL Migration Surprises

3 ways your MySQL migration project can shake you up Once a development or operations team gets over the hurdle of open-source, and start to feel comfortable with the way software works outside of the enterprise world, they will likely start to settle in and feel comfortable.  Best not to get too cushy though for [...]

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1. Migration to MySQL – What is it and why is it important?
2. 7 Ways to Troubleshoot MySQL
3. MySQL DBA Interview Questions
4. 5 Ways to Boost MySQL Scalability
5. Oracle to MySQL Migration Considerations

Read the original article at 5 things toxic to scalability

If you’re using MySQL checkout 5 ways to boost MySQL scalability. Object Relational Mappers ORMs are popular among developers but not among performance experts.  Why is that?  Primarily these two engineers experience a web application from entirely different perspectives.  One is building functionality, delivering features, and results are measured on fitting business requirements.  Performance and [...]

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1. Performance Metrics – What are they and why are they important?
2. iHeavy Insights 81 – Web Performance Metrics
3. Feature Flags – What are they and why are they important?
4. Object Relational Mapper – What is it and why is it important?
5. 5 Ways to Boost MySQL Scalability

Read the original article at 5 Tips for Better Database Change Management

Deploying new code that includes changes to your database schema doesn’t have to be a process fraught with stress and burned fingers. Follow these five tips and enjoy a good nights sleep. 1. Deploy with Roll Forward & Rollback Scripts When developers check-in code that requires schema changes, that release should also require two scripts [...]

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1. Database Change Management – What is it and why is it important?
2. Open Insights 47 – Change the Problem
3. Extract Transform & Load – What is it and why is it important?
4. Database Migration – What is it and why is it important?
5. 7 Ways to Troubleshoot MySQL

Read the original article at 5 Scalability Pitfalls to Avoid

1. Object Relational Mappers Software development has always made use of libraries, off-the-shelf components that are shared between different projects.  These allow you to stand on the shoulders of others and build bigger things.  Frameworks do the same thing, they provide a context from which to build on.  Ruby on Rails for example provides a [...]

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1. 5 Ways to Avoid EC2 Outages
2. 5 Tips for Scalability
3. Scalability – What is it and why is it important?
4. 3 Ways to Boost Cloud Scalability

Read the original article at Top 3 Questions From Clients

1. This page or area of the website is very slow, why? There are a lot of components that make up modern internet websites, and a lot of places to get stuck in the mud.  Website performance starts with the browser, what caching it is doing, their bandwidth to your server, what the webserver is [...]

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1. Backups – What are they and why are they important?
2. Business Continuity Planning – What is it and why is it important?

Read the original article at The New Commodity Hardware Craze aka Cloud Computing

Does anyone remember 15 years ago when the dot-com boom was just starting?  A lot of companies were running on Sun.  Sun was the best hardware you could buy for the price.  It was reliable and a lot of engineers had experience with the operating system, SunOS a flavor of Unix. Yet suddenly companies were [...]

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1. Cloud Computing – What is it and why is it important?
2. Migrating to the Cloud – Why and why not?
3. 5 Steps to Cloud Computing
4. Cloud Computing – Disciplined Deployments
5. Cloud Computing Use Cases

Read the original article at 7 Ways to Troubleshoot MySQL

MySQL databases are great work horses of the internet.  They back tons of modern websites, from blogs and checkout carts, to huge sites like Facebook.  But these technologies don’t run themselves.  When you’re faced with a system that is slowing down, you’ll need the right tools to diagnose and troubleshoot the problem.  MySQL has a [...]

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1. 5 Ways to Boost MySQL Scalability
2. Semi-Synchronous Replication – What is it and why is it important?
3. Migration to MySQL – What is it and why is it important?
4. Database Replication – What is it and why is it important?
5. Extract Transform & Load – What is it and why is it important?

Read the original article at 3 Ways to Boost Cloud Scalability

Deploying in the Amazon cloud is touted as a great way to achieve high scalability while paying only for the computing power you use. How do you get the best scalability from the technology? 1. Use Auto-scaling Auto-scaling is a unique feature of cloud computing and Amazon’s EC2 offering. Setup a load balancer and a [...]

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1. 5 Ways to Boost MySQL Scalability
2. Cloud Computing – Disciplined Deployments
3. Review: Host Your Web Site In The Cloud, Amazon Web Services Made Easy
4. Migrating to the Cloud – Why and why not?
5. MySQL Cluster In The Cloud – Managers Guide

Read the original article at 5 Ways to Boost MySQL Scalability

There are a lot of scalability challenges we see with clients over and over. The list could easily include 20, 50 or even 100 items, but we shortened it down to the biggest five issues we see. 1. Tune those queries By far the biggest bang for your buck is query optimization. Queries can be [...]

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1. Semi-Synchronous Replication – What is it and why is it important?
2. Scalability – What is it and why is it important?
3. Deploying MySQL on Amazon EC2 – 8 Best Practices
4. Database Replication – What is it and why is it important?
5. MySQL Consulting in New York

Read the original article at IOPs – What is it and why is it important?

IOPs are an attempt to standardize comparison of disk speeds across different environments.  When you turn on a computer, everything must be read from disk, but thereafter things are kept in memory.  However applications typically read and write to disk frequently.  When you move to enterprise class applications, especially relational databases, a lot of disk [...]

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1. Cloud Computing – What is it and why is it important?
2. Data warehousing – What is it and why is it important?
3. Root Cause Analysis – What is it and why is it important?
4. Scalability – What is it and why is it important?
5. Mobile Scalability – What is it and why is it important?

Read the original article at Extract Transform & Load – What is it and why is it important?

So-called ETL relates to moving data from external sources into and out of relational databases or data warehouses. Extract Source systems may store data in an infinite variety of formats.  Extracting involves getting that data into common files for moving to the destination system.  CSV file also known as comma separated values is named because [...]

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1. Query Profiling – What is it and why is it important?
2. Data Spot Checks – What are they and why are they important?
3. Relational Database – What is it and why is it important?
4. Data warehousing – What is it and why is it important?
5. Big Data – What is it and why is it important?