Tagging and Snapshotting AWS EBS volumes

By Elvis Taghu

At Nomis Solutions we manage a couple of AWS accounts and wanted to take snapshots of all our EBS volumes and also have retention policies.

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Querying MySQL and writing response to a XLS file.

By Arif Zaidi

Querying and writing to a XLS file.

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Scaling REST Web Services

By Rob Tan

At Nomis Solutions we are building the next generation’s REST Web Services to perform tasks such as price optimization, price sensitivity computation, scenario simulation, attrition scoring among many others.

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Write Performance of Mongo 2.6 vs Mongo 3.0 (WiredTiger)

By Rob Tan

MongoDB recently released v3.0 of their database server with a new storage engine called WiredTiger. WiredTiger performs document-level locking
during writes touting to offer a huge improvement over locks on the entire database or collection in the previous 2.6 version. We were curious to know how significant the performance gains would be compared to the previous version, so we wrote a couple of tests...

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Evaluation of Caching Frameworks

By Rob Tan

To build a system for responsive performance, one often employs the technique of caching data in a fast in-memory store as opposed to hitting the database. At Nomis Solutions, we wanted to compare the performance of various frameworks, considering both local and distributed caches and including internal in-memory caching using a HashMap. We also wanted to compare the performance of no caching at all (i.e. hitting our MongoDB database directly).

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