"Social networking and voting site Digg is rewriting its
underlying software infrastructure in an effort to improve
performance and scalability. Part of that effort involves moving
away from the MySQL database that has helped to power Digg since
"In MySQL's place, Digg is going with an open source NoSQL
non-relational database called Cassandra that was originally
created by Facebook. As part of the migration effort from MySQL to
Cassandra, Digg developers built a tool to help move data from one
database to the other. The tool could soon be open source, helping
other developers make the same move.
""We built a tool that we call 'transcribe' that takes advantage
of Hadoop to bulk import from MySQL to Cassandra," John Quinn, vice
president of engineering at Digg, told InternetNews.com. "We'll be
releasing that to the open source community very soon."
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