DATE: Thursday, October 24, 2013
TIME: 12:00 - 1:00 pm
PLACE: CIC - 4th floor (ISTC Panther Hollow Room)

SPEAKER: Jonathan Ellis, Cassandra

TITLE: Beyond Bigtable: Challenges in Cassandra 2.0 *

Cassandra has fulfilled its original design as a Bigtable/Dynamo hybrid and is moving beyond it with the release of 2.0 last month. (I have annotated the original Cassandra LADIS paper with comparisons to modern Apache Cassandra at [1].)

I will talk about integrating Paxos with an eventually consistent system, using cardinality estimation to improve compaction efficiency, and improving request isolation while preserving operation commutativity. I will also discuss some challenges on Cassandra's roadmap such as tombstone collection and support for petabyte-scale clusters.


Jonathan is CTO and co-founder at DataStax as well as Project Chair of Apache Cassandra. Prior to his work on Cassandra, Jonathan built a multi-petabyte storage system based on Reed-Solomon encoding for backup provider Mozy..

HOST: Andy Pavlo
VISITOR COORDINATOR: Jennifer Landefeld (

Karen Lindenfelser, 86716, or visit

Joint with MCDS
*partially funded by