Simon Willison’s Weblog

Up and running with Cassandra. Twitter are beginning to use Cassandra, the open source branch of Facebook’s BigTable-like non-relational database. Evan Weaver explains how to get started with it, but warns that it’s not yet a good idea to trust data to it without having a full backup in an unrelated storage engine.

# 7th July 2009, 11:18 am / bigtable, cassandra, evanweaver, facebook, nonrelationaldatabases, scaling, twitter

peeping into memcached. “Peep uses ptrace to freeze a running memcached server, dump the internal key metadata, and return the server to a running state”—you can then load the resulting data in to MySQL using LOAD LOCAL INFILE and analyse it using standard SQL queries.

# 20th April 2009, 6:35 pm / evanweaver, introspection, memcached, mysql, peep, performance, scaling, sql, twitter