Simon Willison’s Weblog

Items tagged scaling, nosql

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Using MySQL as a NoSQL—A story for exceeding 750,000 qps on a commodity server. Very interesting approach: much of the speed difference between MySQL/InnoDB and memcached is due to the overhead involved in parsing and processing SQL, so the team at DeNA wrote their own MySQL plugin, HandlerSocket, which exposes a NoSQL-style network protocol for directly calling the low level MySQL storage engine APIs—resulting in a 7.5x performance increase. # 27th October 2010, 11:10 pm

What is the largest production deployment of CouchDB for online use?

The BBC have a pretty big CouchDB cluster, which they use mostly as a replicated key-value store. It’s used by their new identity platform which includes customisation features for iPlayer.

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When I worked at we had a deeply-ingrained hatred for all of the SQL databases in our systems. Now, we knew perfectly well how to scale them through partitioning and other means. But making them highly available was another matter. Replication and failover give you basic reliability, but it’s very limited and inflexible compared to a real distributed datastore with master-master replication, partition tolerance, consensus and/or eventual consistency, or other availability-oriented features.

Matt Brubeck # 4th October 2009, 9:50 am