InfoQ Homepage Performance & Scalability Content on InfoQ
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Erlang's Mnesia - a distributed DBMS for highly scalable apps
Not every application has the scalability requirements of Google, Flickr or Amazon, however the ideas behind the Mnesia DBMS are compelling: a fast, in-process DBMS that takes advantage of concurrency, with the ability to replicate tables across distributed nodes for high scalability and fault tolerance.
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New patterns and middleware architecture needed for true linear scalability?
Nati Shalom says existing tier-based middleware cannot for true linear scalablility. Instead he proposes a new middleware stack based on self-sufficient processing units that supports a partitioned/scale-out model. Pat Helland at Microsoft some years ago proposed some new transactional patterns and formalizations to be used in what he calls almost-infinite scalable systems.
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WSO2 publishes new round of performance metrics for their ESB
WSO2 has recently published a second set of performance metrics for their ESB. It shows that WSO2 ESB outperforms Mule and Apache ServiceMix.
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Microsoft Research's Accelerator: A Data-Parallel Library for .NET that Targets GPUs
Microsoft Research's Accelerator Project exposes a .NET library for performing parallel data processing using a computer's GPU.
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Rubinius Internals: Threading, ObjectSpace, Debugging
We continue the interview with Rubinius creator Evan Phoenix and talk about internals of how the VM uses bytecode manipulation for fast debugging, problems of implementing ObjectSpace and Threading.
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Azul Systems: Next generation Java-based 768 core server released
Azul Systems has announced the release of their third-generation Java-based computing appliance with 768 processing cores. Azul also recently settled a lawsuit with Sun Microsystems. InfoQ caught up with Azul's Gaetan Castelein to discuss these recent events.
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Performance Problems with Lambdas
The LINQ Cookbook reveals some performance issues when using lambdas instead of traditional functions.
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Google Scalability Session Report
Dare Obasanjo shared his notes on a session given by Jeff Dean at the Google Conference on Scalability, "MapReduce, BigTable, and Other Distributed System Abstractions for Handling Large Datasets".
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Configured Rails software stacks become available
Setting up and configuring servers is tedious work, particularly if a lot of libraries are involved. The Rails community has started looking into solutions for solving this, and the first are now available.
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Aaron Erickson on LINQ and i4o
In an interview with InfoQ, Aaron Erickson introduces his new LINQ extension Indexes for Objects (i4o). Indexes for Objects allows for fast lookup against in-memory collections while retaining the LINQ syntax and semantics. He also discusses how expression trees interact with LINQ and how they can be leveraged in other scenarios.
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WebLOAD: Commercial Load Testing Tool Recently Open Sourced
WebLOAD is a load testing tool from Radview that tests both for performance and also correctness. Test scripts are written in Javascript and the tool supports multiple protocols for testing all tiers of an app such as web (HTTP with Ajax support), SOAP/XML, and other protocols. This past April Radview released an open source community edition of WebLOAD under GPL, available at webload.org.
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FiveRuns: First Production Rails Management Suite
Despite Rails popularity, no professional suite existed yet to monitor Rails apps end to end. FiveRuns announced the availability of its solution at RailsConf07.
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Measuring the Immeasurable: Code Metrics for Visual Studio
Code metrics are a way to mathematically calculate the complexity of code. There are several ways to do this, 5 of which are included in Visual Studio Orcas.
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Article: The Challenges of Latency
In an exclusive InfoQ article, eBay architect Dan Pritchett explains why global, large-scale architectures need to address latency, and what architectural patterns can be applied to deal with it.
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Indexes for LINQ
When a LINQ expression directly targets a database, the DLINQ provider has full access to the database's indexes. But LINQ is not only about databases, it can also target XML or even simple object collections. For larger queries, the lack of indexing may become an issue.