Technical


Adding Cross Zone Load Balancing in AWS

One of the new hotness features that Amazon added to their Elastic Load Balancers is cross zone load balancing. This offers the ability to have an unbalanced number of nodes per availability zone within an Amazon region. For instance, if you were load balances across us-east-1a, us-east-1b, and us-east-1c, then you needed to have the …

By eric

Redis Setup Notes and One-Liners

Being a heavy user of Redis has forced some weird Bash-fu and other commands when I want to find out how things are going. Because Redis is single threaded (see here for more information), I commonly run multiple Redis instances per machine. As a result, when running on AWS, I use a specific machine layout …

By eric

Cassandra Summit 2012 Highlights

I was lucky enough to have the opportunity to speak at the Cassandra World Summit 2012 on August 8 in Santa Clara. It was an amazing opportunity to share with the community the types of things that SimpleReach does with Cassandra. Not only that, I learned a lot about the roadmap and got to put …

By eric

What’s So Great About Cassandra’s Composite Columns?

There are a lot of things I really like about Cassandra. But one thing in particular I like in creating a schema is having access to composite columns (read about composite columns and their origins here on Datastax’s blog). Let’s start simple with explaining a composite columns and then we can dive right into why …

By eric

Pros and Cons of Redis-Resque and SQS

As with any system or application, there are upsides and downsides to using them. The two queueing systems that I want to explore are Resque and Amazon’s Simple Queuing Service. Resque is essentially a set of queuing APIs that run on Redis. Redis is an in-memory data store and is what actually handles the queues. …

By eric

Continuous Learning in Teams

One of the most important things in a startup is having a great culture. More often than not, the team will spend more time working and talking with each other than with their family or significant others (scary thought, but yes, it’s probably true). And I don’t want to harp on the importance of culture …

By eric

Choosing a Product By Roadmap

There are a lot of reasons to choose a specific technology. You can decide based on what skills you or the engineers around you have. You can decide on a new technology because it’s the right tool. But there are times when all other things are equal and the flip of a coin would suffice. …

By eric

Google Securing The Web One Discrete Monopolizing Push At A Time

Contrary to speculation by some, Google’s decision for encrypting search data is motivated by the goal to make the web as a whole more secure and it’s not driven by economic interests. I think Google is silently forcing the internet to do what they should be doing on their own.

By eric

Mac

Exploring AppleScript with Alfred Shortcuts

If you have read my blog before, you’ll know that I am a big fan of Alfred (here). I love the shortcuts and the ability to make things quicker. One of the things I find myself doing quite frequently is looking for domains and their traffic counts on Alexa, Compete, and Quantcast.

By eric

Fixing CentOS Root Certificate Authority Issues

While trying to clone a repository from Github the other day on one of my EC2 servers and I ran into an SSL verification issue. As it turns out, Github renewed their SSL certificate (as people who are responsible about their web presence do when their certificate is about to expire). As a result, I …

By eric

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