NoSQL Benchmarks NoSQL use cases NoSQL Videos NoSQL Hybrid Solutions NoSQL Presentations Big Data Hadoop MapReduce Pig Hive Flume Oozie Sqoop HDFS ZooKeeper Cascading Cascalog BigTable Cassandra HBase Hypertable Couchbase CouchDB MongoDB OrientDB RavenDB Jackrabbit Terrastore Amazon DynamoDB Redis Riak Project Voldemort Tokyo Cabinet Kyoto Cabinet memcached Amazon SimpleDB Datomic MemcacheDB M/DB GT.M Amazon Dynamo Dynomite Mnesia Yahoo! PNUTS/Sherpa Neo4j InfoGrid Sones GraphDB InfiniteGraph AllegroGraph MarkLogic Clustrix CouchDB Case Studies MongoDB Case Studies NoSQL at Adobe NoSQL at Facebook NoSQL at Twitter



APM: All content tagged as APM in NoSQL databases and polyglot persistence

Cassandra and Neo4j Used by Evident ClearStone APM

The new architecture of Evident ClearStone APM is using both Cassandra and Neo4j:

Cassandra is implemented as a time-series data store for storing all the real-time data and historical data. Our implementation uses Apache Cassandra 0.7 with the Hector client APIs for Cassandra. With Cassandra 0.7, we can dynamically create and evolve column families for storing all the performance data. The performance data is normalized by metric. We have also partitioned our column families based on the granularity of the data sets.

Neo4j is implemented as an inventory database used for maintaining all the managed resources (i.e. processes, hosts, clusters, etc.) of the application environment. It is used to store current state of all the resources, relationships among the resources, and correlated events to these resources. Anytime there are events associated with a resource, we keep a timeline of such events married to a snapshot of the associated resource(s) in the inventory at the time of the event occurrence. We felt the use of a graph database like Neo4j was ideal for storing metadata for the resources and mapping relationships and correlated events.

Bill Nigh writes about some of the challenges of moving from an RDBMS to NoSQL technologies:

  • lack of queries and triggers for data changes
  • too much schema-less freedom in Neo4j graph database or the challenge of doing data modeling

So Evident is not only offering tools for monitoring NoSQL solutions, but they are using them internally for their product. Practice what you preach.

Original title and link: Cassandra and Neo4j Used by Evident ClearStone APM (NoSQL databases © myNoSQL)