InfoQ Homepage MongoDB Content on InfoQ
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MoSQL: Synchronizing MongoDB and PostgreSQL Made Easy
San Francisco based Stripe has announced MoSQL, a tool for making reporting from MongoDB much easier via a live-replicating PostgreSQL database. MoSQL is based on MongoRiver, their companion product for monitoring MongoDB data updates in near-realtime.
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Simba Technologies is bringing the power of SQL to Cassandra, Hadoop, BigQuery, and MongoDB
At its heart, SQL is a domain specific language designed to allow non-professional programmers to query databases and write ad hock reports. When a company moves from a relational database to a NoSQL offering the need for ad hock reporting doesn’t go away, it just becomes harder. Simba’s ODBC drivers shift the power back into the hands of the users.
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Group By in MongoDB
In response to demands for simpler data access, MongoDB is introducing the Aggregation Framework. This library uses a declarative pipe-line notation to support features such as SQL-like group by operations without having to write custom JavaScript routines.
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.NET Framework Support for Cloud Foundry Through Open Source Contribution From Tier 3
Cloud service provider Tier 3 has released Iron Foundry, a .NET-friendly fork of VMware’s Cloud Foundry platform-as-a-service. Iron Foundry gives the sizeable number of .NET developers an open source alternative to Windows Azure and lets them participate in the increasingly popular Cloud Foundry ecosystem.
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MongoGraph Brings Semantic Web Features to MongoDB Developers
MongoGraph from AllegroGraph brings semantic web features to MongoDB developers. They implemented a MongoDB interface to AllegroGraph database to give Javascript programmers both joins and the semantic web capabilities. InfoQ spoke with AllegoGraph CEO Jans Aasman about this new approach and how it helps the NoSQL developers.
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VMware's CloudFoundry Service Gains Support for PostgreSQL
VMware is adding support for PostgreSQL to CloudFoundry, it's open source PAAS solution.
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MongoDB’s Reliability Questioned
Recently there have been two fairly high profile field reports on MongoDB that show it in a very unfavorable light. The majority of the criticism centers on a combination of performance problems and data loss.
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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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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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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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RubyConf China: NoSQL, Rails, and Matz on Ruby 2.0
The 2nd annual RubyConf China, this year in Shanghai, China, featured Ruby creator Matz who talked about Ruby Community and Ruby 2.0. InfoQ takes a look at the other talks and what tools and databases Ruby developers in and around China use.