InfoQ Homepage NoSQL Content on InfoQ
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Usergrid: a New Open Source Platform for Mobile and Rich Client Applications
Last week, Ed Anuff, founder of Usergrid, announced the first source code release available on GitHub. Usergrid is a comprehensive platform stack for mobile and rich client applications. It can be deployed as a highly scalable Cloud service, it is built in Java and runs on top of Cassandra.
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Spring Roo 1.2 M1: Apache Licensed with JPA Repositories, MongoDB and Services Layer
SpringSource has released Spring Roo 1.2.0.M1. This release has improved performance, is released under ASL 2, is hosted in GitHub, supports JPA and MongoDB Repositories, supports a services layer, has improved GWT support, has multi-schema DBRE, and has shell improvements.
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Oracle Joins the NoSQL Club
Oracle has announced the Big Data Appliance running with Oracle NoSQL Database, a new key-value store based on Oracle Berkeley DB Java Edition. Some of features include: billions of rows of storage capacity in records and terabytes in B-tree, ACID transactions, CRUD, sharding, no single point of failure, disaster recovery via datacenter replication.
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William McKnight on Columnar Databases
Columnar databases offer better data storage capabilities for certain business use cases compared to the traditional relational database management systems. William McKnight spoke at NoSQL Now 2011 Conference last week about the columnar databases and how they can be effective for certain data storage needs.
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Windows Server AppFabric adds Read-Through and Write-Behind Support
The new Read-Through and Write-Behind support in AppFabric 1.1 allow developers to improve performance while at the same time reduce the complexity of their applications. This is done by moving the logic for reading from and writing to the database into the caching server itself. Other improvements include lazy-loading of session state information and support for ASP.NET output caching.
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Interview: Richard Hipp on UnQL, a New Query Language for Document Databases
This interview with Richard Hipp, creator of SQLite, unveils the details of UnQL, a new query language for JSON document databases. Hipp mentions UnQLite, an embedded document database he plans to create.
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Google Has Open Sourced LevelDB, A Key-Value Datastore
Google has open sourced LevelDB under the New BSD license. LevelDB is an embedded key-value datastore whose keys and associated values are arbitrary byte arrays sorted by key, a sorting mechanism that can be overridden. The datastore is pretty simple, accepting Put, Get, and Delete commands along with forward and backward iterations.
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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?