Twitter to stop using Cassandra
Cassandra, open source distributed database, which was originally open sourced by Facebook in 2008 and is now being developed by Apache.
Twitter has been using Cassandra for various things like @toptweets, local trends, and analytics. Even the operations and infrastructure teams uses cassandra for large-scale real time analytics for use both internally and externally. This means, we can expect launching of Twitter Analytics soon.
Twitter on their recent blog post said:
“For now, we’re not working on using Cassandra as a store for Tweets. This is a change in strategy. Instead we’re going to continue to maintain our existing Mysql-based storage. We believe that this isn’t the time to make large scale migration to a new technology.”
We think this change is mainly due to “Fail whales” which Twitter had in the last month. We hope this change should bring some stability & reduces the downtime.
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Jul 13 2010