Links of the Day - 2010/07/02

Links of the Day for July 2nd, 2010

• Ask HN: Cassandra, HBase, Hypertable, Voldemort. Lowest read latency? - There's a discussion going on at HackerNews discussing which Key/Value NoSQL datastore has the lowest read latency. Some good comments and questions to consider.
• Goodbye Tokyo Cabinet, hello PostgreSQL? - Another NoSQL attempt bites the dust. In this case it appears it's not really Tokyo Cabinet's fault. To quote Brian Carper, "I switched to TC to begin with because I was using SQL wrong, and it was too slow and clumsy. Once I figured out how to use SQL correctly, it was a no-brainer to go back."
• LinkedIn, Apache Pig, and Open Source - Russell Jurney discusses LinkedIn's usage of Pig at LinkedIn.

Project Voldemort Scaling Simple Storage At LinkedIn

The data store whose name is inspired by he who shall not be named is actually the brainchild of LinkedIn. In this presentation by Jay Kreps he walks us through the following:

• LinkedIn's motivations for creating Voldemort.
• Core concepts that are key to understanding Voldemort, i.e. CAP, Consistency Models, Partitioning, etc.
• Implementation details such as client API, versioning, serialization and routing to name a few.
• How Voldemort is being used at LinkedIn
• The results of deploying Voldemort withing LinkedIn, some performance numbers, weaknesses and upcoming features.

The presentation provides a clear concise review of several core concepts that are relevant in almost all NoSQL data stores. In addition, the presentation provides a helpful introduction to Voldemort.