The Apache Software Foundation (ASF) announces version 0.7 of the Cassandra open-source distributed database.
The Apache Software
has announced Apache Cassandra version 0.7, a
second-generation, open-source distributed database.
ASF officials said new features in Cassandra 0.7 include
secondary indexes, which represent an expressive way to query data through
node-local storage on the client side; large row support, up to two billion
columns per row; and online schema changes, or automated online schema changes
from the client API to allow adding and modifying object definitions without
requiring a cluster restart.
ASF also said Apache Cassandra has been successfully
deployed at enterprises with active data sets and large server clusters,
including Cisco, Cloudkick, Digg, Facebook, Rackspace, Reddit and Twitter. The
largest Cassandra cluster to date contains over 400 machines.
"Apache Cassandra is a key component in cloud
computing and other applications that deal with massive amounts of data and
high query volumes," said Jonathan Ellis, vice president of Apache
Cassandra, in a statement. "It is particularly successful in powering
large web sites with sharp growth rates."
"Running any large website is a constant race
between scaling your user base and scaling your infrastructure to support
it," said David King, lead developer at Reddit, in a statement. "Our
traffic more than tripled this year, and the transparent scalability afforded
to us by Apache Cassandra is in large part what allowed us to do it on our
limited resources. Cassandra v0.7 represents the real-life operations lessons
learned from installations like ours and provides further features like column
expiration that allow us to scale even more of our infrastructure."
Apache Cassandra is available under the Apache Software
License v2.0, and is overseen by a Project Management Committee (PMC), who
guides its day-to-day operations, including community development and product
releases. Moreover, Apache Cassandra v0.7 downloads, documentation, and related
resources are available at http://cassandra.apache.org/