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Displaying posts with tag: Database Operations (reset)
Howto automate MySQL slow query analysis with amazon RDS

If you’ve used relational databases for more than ten minutes, I hope you’ve heard of slow queries. Those are those pesky little gremlins that are slowing down your startup, and preventing scalability you so desperately need. Luckily there’s a solution. What I’ve found is if I send a report to developers every week, it keeps […]

If you use MySQL in the Amazon cloud, you need to ask yourself this question

Join 25,000 others and follow Sean Hull on twitter @hullsean. Are you serious about backups? If you’re just using Amazon EBS snapshots, that may not be sufficient. There’s a good chance it won’t protect you against your next data loss. That’s why I like to have a few different types of backups Also: 5 more […]

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 [...]

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 [...]

Crashed nodes corrupt your MySQL cluster

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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 [...]

For more articles like these go to Sean Hull's Scalable Startups

Related posts:

  1. MySQL Cluster In The Cloud – Managers Guide
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10 reaons active-active is hard and how to solve it

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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. [...]

For more articles like these go to Sean Hull's Scalable Startups

Related posts:

  1. Why does MySQL replication fail?
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The Art of Resistance

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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 too. And another DBA just to handle the Oracle stuff.

So it came time for Oracle guy to go on vacation. Suddenly these Oracle systems landed on my shoulders. We reviewed everything in advance, then he bid his goodbyes.

Almost as soon as he was out the door I …

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Ten things to remember about MySQL backups

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  1. Use Hot 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.

Use Logical Backups

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 one table?  All these great uses make mysqldump indispensable.  Use it in …

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A History lesson for Cloud Detractors

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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 everyone pushing them? It's just foolhardy, they say.

On the other end, management and their bean counters would simply roll their eyes saying this is why the tech guys aren't running the business.

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Book Review – Effective MySQL

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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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