InfoQ Homepage NoSQL Content on InfoQ
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CassandraSF2011: Progress and Futures
Johnathan Ellis keynoted at Cassandra SF 2011. Ellis reviewed accomplishments including better support for multi-data center deployments, optimized read performance, included integrated caching and improved client APIs including a SQL-like language CQL. Looking forward, Ellis emphasized polish - efficient database repair, storage compression, optimized performance and an expanded CQL language.
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Cassandra Indexing Guidelines from CassandraSF2011
Ed Anuff reviewed Cassandra's built-in secondary indexes, noting that they don't work well for high cardinality values, require at least one equality comparison and return unsorted results. Anuff presented patterns for alternative indexing including wide rows and tables that use Cassandra 0.8.1's new composite comparator operators to overcome these limitations.
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Graph Database Neo4j Updates Licensing and Enhances Usability
Neo Technology has released version 1.3 GA (General Availability) of Neo4j. This release updates Neo4j's licensing and adds a number of features. The Community edition is now licensed under GPLv3, the same license as MySQL.
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NoSQL, NewSQL and Beyond
The 451 Group has published earlier this month the conclusions of a report detailing the growing set of options in the information management space. In the process they also clarified what they meant by "NewSQL".
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Hadoop Futures at Structure Big Data: DataStax Brisk, EMC, and MapR
DataStax described Brisk their new Hadoop distribution that stores data in Cassandra, EMC published an ad that promised big news about Hadoop and Greenplum on May 9th, and GigaOm claimed that MapR Technologies is building a proprietary version of Hadoop. DataStax told InfoQ there are production Cassandra clusters of 700 nodes, storing hundreds of terbaytes, and doing 200,000 writes per second.
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MongoDB 1.8 Improves Reliability with Journaling
MongoDB's new journaling feature improves reliability with write-ahead redo logs. Log entries are written before permanent storage is updated. When a server restarts after a crash outstanding journal files will be replayed before the server goes online. Other changes include sharding performance boosts, shell tab completion, and the addition of covering and sparse indexes.
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NoSQL Shake-Up. Membase and CouchOne merge into Couchbase
The shape of the NoSQL landscape is changing. The first big market aggregation took place with the merger of Membase Inc. with CouchOne into Couchbase. InfoQ spoke with James Phillip and Damien Katz about the benefits of the merger and future products.
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Making the Case for RAMClouds
Since early 2008, researchers and technologists alike have been tantalized by the possibility of using DRAM to scale high-performance storage using In Memory Data Grids, IMDG. How has the discussion progressed since that time?
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MySQL/HandlerSocket and VoltDB: Contenders to NoSQL
NoSQL systems are considered by some as performing better than traditional SQL ones. Two SQL solutions, one based on MySQL plus a NoSQL layer used as a plug-in and VoltDB claim SQL still is a viable solution for large applications with high scalability needs.
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Foursquare's MongoDB Outage
Foursquare recently suffered a total site outage for eleven hours. The outage was caused by unexpected uneven growth in their MongoDB database that their monitoring didn't detect. The system outage was prolonged when an attempt to add a partition didn't work due to fragmentation, and required taking the database offline to compact it. Learn what happened and what responses are planned.
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Membase and Cloudera Announce Integration
Membase and Cloudera announced integration of the Membase NoSQL database and Cloudera's Distribution for Hadoop, the distributed map-reduce and storage system, allowing for bi-direction data replication between the systems.
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Designing a Web Application with Scalability in Mind
Max Indelicato, a Software Development Director and former Chief Software Architect, has written a post on how to design a web application for scalability. He suggests choosing the right deploying and storage solution, a scalable data storage and schema, and using abstraction layers.
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Four NoSQL Add-ons available for Heroku Users
The first four NoSQL datastores are available as Add-ons for the Heroku PaaS (platform-as-a-service) platform. Using the Add-on system that was introduced in October 2009, CouchDB from Cloudant, Membase from NorthScale, MongoDB from MongoHQ and Redis were made available for Heroku users.
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MongoDB 1.6 Adds Sharding and Replica Sets
MongoDB 1.6 is a major release addressing the scaling-out issue through sharding and adding replica sets for automatic failover and recovery.
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LinkedIn's Data Infrastructure
Jay Kreps of LinkedIn presented some informative details of how they process data at the recent Hadoop Summit. Kreps described how LinkedIn crunches 120 billion relationships per day and blends large scale data computation with high volume, low latency site serving.