Browsing All posts tagged under »NoSQL«

Foursquare’s MongoDB Outage

October 15, 2010


Foursquare recently suffered a total site outage for eleven hours. The outage was caused by unexpected uneven growth in their MongoDB database that their monitoring didn’t detect. The system outage was prolonged when an attempt to add a partition didn’t work due to fragmentation, and required taking the database offline to compact it. This article […]

LinkedIn’s Data Infrastructure

August 4, 2010


Jay Kreps of LinkedIn presented some informative details of how they process data at the recent Hadoop Summit. Kreps described how LinkedIn crunches 120 billion relationships per day and blends large scale data computation with high volume, low latency site serving. Much of LinkedIn’s important data is offline – it moves fairly slowly. So they […]