The Cassandra team is very pleased to announce the release of Apache Cassandra
version 1.0.0. Cassandra 1.0.0 is a new major release that build upon the
awesomeness of previous versions and adds numerous improvements[1,2], amongst
which:
- Compression of on-disk data files (SSTables), with checksummed blocks to
protect against bitrot[4].
- Improvements to memory management through off-heap caches, arena
allocation and automatic self-tuning, for less GC pauses and more
predictable performances[5].
- Better disk-space management: better control of the space taken by commit
logs and immediate deletion of obsolete data files.
- New optional leveled compaction strategy with more predictable performance
and fixed sstable size[6].
- Improved hinted handoffs, leading to less need for read repair for
better read performances.
- Lots of improvements to performance[7], CQL, repair, easier operation,
etc[8]...
And as is the rule for some time now, rolling upgrades from previous versions
are supported, so there is nothing stopping you to get all those goodies right
now!
Both source and binary distributions of Cassandra 1.0.0 can be downloaded at:
http://cassandra.apache.org/download/
Or you can use the debian package available from the project APT repository[3]
(you will need to use the 10x series).
The download page also link to the CQL drivers that, from this release on, are
maintained out of tree[9].
That's all folks!
[1]: http://goo.gl/t3qpw (CHANGES.txt)
[2]: http://goo.gl/6t0qN (NEWS.txt)
[3]: http://wiki.apache.org/cassandra/DebianPackaging
[4]: http://www.datastax.com/dev/blog/whats-new-in-cassandra-1-0-compression
[5]:
http://www.datastax.com/dev/blog/whats-new-in-cassandra-1-0-improved-memory-and-disk-space-management
[6]: http://www.datastax.com/dev/blog/leveled-compaction-in-apache-cassandra
[7]: http://www.datastax.com/dev/blog/whats-new-in-cassandra-1-0-performance
[8]:
http://www.datastax.com/dev/blog/whats-new-in-cassandra-1-0-windows-service-new-cql-clients-and-more
[9]: http://acunu.com/blogs/eric-evans/cassandra-drivers-released/
