InfoQ Homepage AI, ML & Data Engineering Content on InfoQ
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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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MapR Releases Commercial Distributions based on Hadoop
MapR Technologies released a big data toolkit, based on Apache Hadoop with their own distributed storage alternative to HDFS. The software is commercial, with both a free edition, M3, as well as a paid edition, M5. M5 includes snapshots and mirroring for data, Job Tracker recovery, and commercial support. MapR's M5 edition will form the basis of EMC Greenplum's upcoming HD Enterprise Edition.
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Yahoo Hadoop Spinout Hortonworks Announces Plans
Yahoo spun-out its core Hadoop team, forming a new company Hortonworks. CEO Eric Baldeschwieler presented their vision of easing adoption of Hadoop and making core engineering improvements for availability, performance, and manageability. Hortonworks will sell support, training, and certification, primarily indirects through partners.
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Big Data – The Next Frontier
According to the new report from McKinsey Global Institute, Big Data is becoming a factor of production like physical or human capital.
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Ravi Kannan receives ACM SIGACT Knuth Price 2011
Ravi Kannan from Microsoft Research has been appointed winner of the ACM SIGACT's (Special Interest Group on Algorithms and Computation Theory) Knuth Price 2011. According to the press announcement he receives the price for his work on influential algorithic techniques aimed at solving long-standing computational problems.
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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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Couchbase Announces Couchbase Server and an Advisory Board
Couchbase, the company recently formed by merging Membase and CouchOne, has announced the availability of Couchbase Server in addition to Membase Server and Mobile Couchbase, along with the Advisory Board Members.
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Scale-up or Scale-out? Or both?
A prevalent trend in IT in the last twenty years was scaling-out, rather than scaling-up. But due to the recent technological advances there is a new option, scaling-out scaled-up servers based on GPUs.