InfoQ Homepage Data Access Content on InfoQ
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Presentation: CouchDB and Me
In this talk from RubyFringe, Damien Katz explains what drove him to create CouchDB, why he chose Erlang, how it ended up as an Apache project and much more.
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Two Type-Safe Criteria API Proposals for JPA 2.0
One of the most significant new features in the forthcoming Java Persistence API 2.0 specification is a type-safe criteria-based query API. There are two alternative proposals under consideration by the JSR-317 Expert Group and the group is seeking feedback from the wider development community.
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New Entity Framework Providers: OpenLink and Firebird
OpenLink and Firebird have been added to the list of supporters of the Entity Framework by releasing their ADO.NET 3.5 providers.
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Eventually Consistent, Revisited
Building reliable distributed systems at a worldwide scale demands trade-offs between consistency and availability. Last month, Amazon’s CTO Werner Vogels posted an article describing approaches to tolerate eventual data consistency in large-scale distributed systems.
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Article: Performance Anti-Patterns in Database-Driven Applications
In this article, Alois Reitbauer, a Performance Architect for dynaTrace Software, specifies several architectural anti-patterns which can downgrade an application’s performance. Knowing those anti-patterns and proactively designing the application to avoid them will keep away certain snags that can impact application’s performance.
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IBM’s Data Server Provider for .NET Supports the Entity Framework
IBM has released the production version of its Data Server Provider for .NET including support for Microsoft’s Entity Framework allowing its users to create EDM schemas, and to execute EntitySQL and LINQ statements.
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LINQ to SQL, The Next Step
Despite the numerous problems with Microsoft ORMs and the plethora of alternatives such as LLBLGen, nHibernate, and OpenAccess, many developers are forced to use Microsoft tech because that is why their company or customer wants. And between the two offerings, it seems most developers believe that Entity Framework is not a viable option. So what are they do to?
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Does LINQ-to-Entities really return different results depending on previous queries?
In a recent blog post Stu Smith claimed that “LINQ-to-Entities will return different results depending on what previous queries you’ve executed!”. If true, this would make using Entity Framework much harder than necessary to use. We talked to Elisa Flasko of the ADO.NET Team to find out what’s really going on.
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Working Around Entity Framework's Large Data Model Issues
The Entity Framework doesn't support data models with much more than 50 to 100 entities. But since companies typically run everything from one central database, several hundred tables are the norm. Microsoft's ADO.NET team is presenting an article on Working With Large Models In Entity Framework, a list of issues and work-arounds for EF users.
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Envers Joins Hibernate
Envers is an open-source project from JBoss which has recently been added under the Hibernate umbrella.
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Amazon’s SimpleDB Enters Public Beta
Amazon finished private beta testing and has entered into public unlimited beta of its cloud database service named SimpleDB. SimpleDB is meant to be a simple to be accessed database in the cloud, and Amazon is offering limited access to it for free.
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Martin Fowler Sees a Thaw in Frozen Thinking about Data Storage
In a recent blog post, Martin Fowler, a renowned software thought leader, observed at last week's QCon that the deep freeze in thinking about databases in application architectures is thawing. The world has been stuck using RDBMS databases for every application use case, but the time has come to also consider RISC RDBMS or distributed document-oriented databases.
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No Change Tracking for ADO.NET Entity Framework 2010
One of the biggest complaints about ADO.NET Entity Framework was that it did not support change tracking. Despite everything from ADO.NET DataSets to every single non-Microsoft ORM having support for this out of the box, Microsoft has no intention of fixing this in the .NET 4.0/VS 2010 timeframe.
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Sequel, The Database Toolkit For Ruby
Sequel, apart from being an alternative to ActiveRecord, offers a complete Ruby toolkit to handle database operations. InfoQ had the chance to catch up with Jeremy Evans who replaced Sharon Rosner as project leader eight months ago.
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ADO.NET Data Services Is About to Go Offline
ADO.NET Data Services, previously known as Project Astoria, will receive offline capabilities in the near future. That means applications could be developed to synchronize their data, then use it in an offline fashion.