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HAPROXY up and running in couple of minutes

I tried HAPROXY for my WEBAPP (Hosted on tomcat) -reason for using HAPROXY is that it also supports WEBSOCKETS and my current project uses websockets for server push. As first step, I tested it with bare bone web application -wow, ...
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Performance tests for slow networks with tc

tl;dr: you can easily replicate slow network conditions which makes it easier to performance test them. Smartphones have made both mobile websites and apps that have to connect in mobile situations a lot more common. There’s ...
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Maintaining Software Sucks – and what we can do about it

If you ask most developers, they will tell you that working in maintenance sucks. Understanding and fixing somebody else’s lousy code is hard. It’s tedious. And it’s frustrating – because you know you would do a better job ...
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Immutable Servers With Packer and Puppet

Lately I’ve been becoming more and more of a fan of is the concept of Immutable Servers while automating our infrastructure at Zapier. The concept is simple: never do server upgrades or changes on live servers, instead just buil ...
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MongoDB Pro Tip: Field Projections

Did you ever learn that select * from table in RDBMS-land is bad? Of course, you did! If you’re only looking for the email address of a user and not the other 15 columns worth of data, then why ask for that data and incur a pena ...
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MongoDB Geo-Spatial Mobile Demo

Mongo: noun (pl mongo or mongos) – a monetary unit of Mongolia. Equal to one hundredth of a tugrik. Origin from Mongolian “silver” I’ve written about NoSQL DBMS [http://keyholesoftware.com/2012/10/01/is-nosql-the-sql-seque ...
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Deploy your Node/Couchbase application to the cloud with Clever Cloud

Introduction Clever Cloud is the first PaaS to provide Couchbase as a service allowing developers to run applications in a fully managed environment. This article shows how to deploy an existing application to Clever Cloud. I am ...
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SQL to NoSQL : Copy your data from MySQL to Couchbase

Introduction During my last interactions with the Couchbase community, I had the question how can I easily import my data from my current database into Couchbase. And my answer was always the same:Take an ETL such as Talend to d ...
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MongoDB to CSV

Every once in a while, I need to give a non-technical user (like a business analyst) data residing in MongoDB; consequently, I export the target data as a CSV file (which they can presumably slice and dice once they import it into ...
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Archiving data to AWS Glacier

For archiving your data at AWS you can use AWS Glacier. This service offers cheaper storage than the S3 service but the downside is that your data won’t be accessible right away as it is with S3. It may take a few hours to resto ...
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