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Graylog2: MongoDB for Centralizing Logging

Why Graylog2 uses MongoDB:

So we need something in between: schema-less storage with indexes, everything else are bonuses. With Mongo DB we got a lot of them:

  • capped collections, which preserve insertion order and maximum collection size, automatically removing old messages;
  • tailed cursors, which are used to implement tail -f behavior;
  • awesome performance;
  • and an easy API.

Original title and link: Graylog2: MongoDB for Centralizing Logging (NoSQL databases © myNoSQL)