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Peter Zaitsev12/17/13
4614 views
0 replies

Seconds_Behind_Master fluctuating wildly? Check for events caught in a loop

Recently I was working with a customer where we noticed that Seconds_Behind_Master fluctuating from an expected value of 0 seconds behind to a fairly high six figure value. So what was the fix? We leveraged the CHANGE MASTER TO syntax to utilize IGNORE_SERVER_IDS setting:

Seth Proctor12/17/13
4403 views
0 replies

Failure Detection and Network Partition Management in NuoDB

There is always the risk that communication between database nodes is affected by either a break in the network link or a partition of the network space. To handle such network problems, NuoDB has a failure detection system. In this article, you'll learn the basics of this system and how to enable it.

Troy Hunt12/17/13
4125 views
0 replies

Micro-optimizing Web Content for Unexpected Wild Success

I had a little problem last week. I built a very small website – really just a one pager with a single API – whacked it up on an Azure website and then promptly had a quarter of a million people visit it in three days. Uh, bugger? There are a whole different set of challenges involved when optimising for large traffic volumes, let me walk you through how I tackled it.

Alec Noller12/16/13
8330 views
0 replies

Understanding the Limitations of MongoDB

This article takes an interesting look at MongoDB by highlighting its limitations, not to criticize or demonize MongoDB, but to clarify weaknesses in order to prevent lack of user understanding from misrepresenting it. In other words, you can't blame a screwdriver for not being a hammer.

Arthur Charpentier12/16/13
4776 views
0 replies

Data News: Bayesian Statistics in Python, and More

This installment of Arthur Charpentier's regular collection of data science-related links includes Bayesian statistics in Python, contagious diseases in the United States from 1888 (in R), a "24 days of R" advent calendar, and more.

Mark Needham12/16/13
7669 views
1 replies

Neo4j's Cypher: Getting the Hang of MERGE

The author has been trying to get the hang of Cypher’s MERGE function, and started out by writing a small file to import some people with random properties using the java-faker library. In this article, you'll learn more about the MERGE function.

Paul Hammant12/16/13
9117 views
1 replies

Worst Practices Teams

For every “best practices” team, there is an equal (in magnitude) and opposing “worst practices” team silently going round the organization making things worse. Here's an example: Printer names...

Vlad Mihalcea12/16/13
10549 views
0 replies

Why I Like Spring Bean Aliasing

Spring framework is widely used as a dependency injection container, and that’s for good reasons. But there is also a very useful feature that might get overlooked and is therefore worthy of discussion: bean aliasing.

Ricky Ho12/16/13
4198 views
2 replies

Escape Local Optimum Trap

In this post, I will be focusing on local search, which is a very popular technique in searching for an optimal solution based on a series of greedy local moves. The general setting of local search is as follows ...

Ariya Hidayat12/16/13
7477 views
0 replies

JavaScript Kinetic Scrolling: Part 3

In the third part of this JavaScript kinetic scrolling series, the so-called snap to grid feature is demonstrated. The implementation is rather straightforward: It is a matter of figuring out where the scrolling should stop and then adjusting that target position to the intended location.

Mitch Pronschinske12/15/13
5171 views
0 replies

Building Heroku Postgres: Good Architects Borrow, Great Architects Steal

Hear about the lucky breaks, the gnarly mistakes, and the unknowable choices that Heroku developers had when building the architecture that powers Heroku Postgres, and listen to the bonus podcast from Thoughtbot for an even closer look.

Alec Noller12/15/13
5042 views
0 replies

The Best of the Week (Dec. 6): NoSQL Zone

Make sure you didn't miss anything with this list of the Best of the Week in the NoSQL Zone. This week's best include a discussion of the need (or lack of need) of eventually consistent data, a critique of last year's wave of MongoDB criticisms, an alternative NoSQL solution called ArangoDB, and more.

Ayende Rahien12/14/13
8570 views
0 replies

More Thoughts About Compression and Storage

One of the things that the author liked in LevelDB is that it pretty much had compression built in from day one. The entire format is built to save space just about wherever it can. LMDB, in contrast, went quite the opposite way.

Jesse Warden12/13/13
4321 views
0 replies

6 Notes To Consider on the Technical Difficulties with Healthcare.gov

Things will slowly improve. There will continue to be glitches, some of which the press may even talk about a year from now. But a Jan 1st deadline is unrealistic.

Doug Turnbull12/13/13
13587 views
2 replies

Codd’s Relational Vision: Has NoSQL Come Full Circle?

Much of the NoSQL movement feels like a rebellion against the “old timey” feeling relational databases. The author thought it would be fascinating to dig into the value of relational databases. In short, relational databases were the noSomething, and he aimed to find out what that something was.