InfoQ Homepage Data Access Content on InfoQ
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Microsoft Slows Down Release Cadence for Entity Framework, Adopts Semantic Versioning
Since .NET 4 was released Microsoft has been pushing an ever faster release cadence for its .NET libraries with new features coming out every few months instead of every few years like it had done in the past. As a result of a recent embarrassment, the ADO.NET team is moving back to using beta releases and, to reduce future confusion, adopting the concept of Semantic Versioning.
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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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Veracity, a New DVCS Based on a Distributed Database
Veracity is a DVCS that can be installed on Windows, Mac, and Linux, and uses a distributed database for its repository.
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Forrester Proclaims Data Virtualization Technology Coming of Age
Businesses have been strangled by high integration costs from ETL and DBMS consolidation initiatives which still leads to information silos and a broken data infrastructure. Forrester in its latest report claims that data virtualization driven by technological advances and customer successes is ready for massive adoption.
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Rx 1.0 Solves the Problem of Asynchronous Data Access
Microsoft has released version 1.0 of their Reactive Extensions (Rx) library after two years in incubation. Rx combines event-driven UI with LINQ, concurrency and asynchronous calls.
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Olap4j 1.0: a Java API for OLAP Servers
Business Intelligence vendor Pentaho has announced the release of olap4j 1.0, a new, common Java API for any online analytical processing (OLAP) server.
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VMware vFabric SQLFire Is Both an SQL Distributed Cache and a Datastore
VMware vFabric SQLFire is an in-memory distributed SQL-based cache which can work with a traditional database to persist data to disk.
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Differing Opinions: DTOs vs Domain Objects
Since the introduction of NHibernate and WCF, .NET developers have been moving closer and closer to the concept of unified entity-models. The end game here is that the same class can be act as your ORM entity, your WCF DTO, and your model for a MVC, MVP, or MVVM framework. Mark Seemann, author of Dependency Injection in .NET, argues this isn’t necessarily a good thing.
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Introducing the Entity Framework Power Tools
The introduction of a Code First option in Entity Framework has received quite a bit of praise. While it still has a long way to go before it unseats the reigning ORM, nHibernate, the progress Microsoft is making is quite astounding. In order to keep the momentum up Microsoft is releasing a set of power tools that will take an existing database and create a Code First representation.
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Google Storage is Now Available to All Developers
Google has announced at I/O 2011 the availability of their Storage service to all developers without the need for an invitation. The service has been enhanced with OAuth 2.0 support, simplified account management through the API Console, a new EU storage region, and a new API version.
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SQL Server 2008 SP1 and Feature Pack CTP Bring New Features and Tools
Microsoft has announced the availability for download of SQL Server 2008 R2 SP1 CTP, including all cumulative updates, and SQL Server 2008 R2 SP1 Feature Pack CTP1, containing a number of stand alone tools adding more value to SQL Server 2008.
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StackOverflow’s ORM goes Open Source - Dapper.Net
A simple ORM used in StackOverflow titled Dapper.Net was recently released on code.google.com. This ORM specializes in fast generation of objects from SQL query results. Dapper.Net supports mapping query results to a strongly typed list or a list of dynamic objects. The ORM is a single file of less than 500 lines of C# code and is available under the Apache 2.0 License.
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Trinity: Microsoft Research’s Hypergraph Database
MS Research has begun working on its own graph database, Trinity. Graph databases store data in terms of nodes and edges instead of rows and columns, making them quite effective for loosely and arbitrarily connected data. Hypergraphs extend this by allowing one edge to connect multiple nodes. Potentially uses for this included social networks, movie recommendations, and related product searches.