Memory Ordering in Modern Microprocessors, Part I | Linux Journal
Since the 2.0 kernel release, Linux has supported a large number of SMP systems based on a variety of CPUs. Linux has done an excellent job of abstracting differences among these CPUs, even in kernel code. This article is an overview of one important difference: how CPUs allow memory accesses to be reordered in SMP systems. Memory accesses are among the slowest of a CPU's operations, due to the fa
Distributed Caching with Memcached | Linux Journal
Memcached is a high-performance, distributed caching system. Although application-neutral, it's most commonly used to speed up dynamic Web applications by alleviating database load. Memcached is used on LiveJournal, Slashdot, Wikipedia and other high-traffic sites. For the past eight years I've been creating large, interactive, database-backed Web sites spanning multiple servers. Approximately 70
Everything Your Professor Failed to Tell You About Functional Programming | Linux Journal
Everything Your Professor Failed to Tell You About Functional Programming I've been trying to learn Haskell lately, and the hardest thing seems to be learning about monads. "Monads in Ruby" and "Monads for Functional Programming" helped me finally to break the ice, but more importantly, they gave me a glimpse behind the veil. I finally began to understand something that is trivial to people such a
Exploring Ruby on Rails
When I found out that my friend, Doug Fales, finally had gotten around to learning Ruby and was putting together a blog using Ruby on Rails (RoR), I knew it had been too long since I'd left the world of templating engines for satellite imagery and petabytes. It seemed that every blog I read either was proclaiming Rails as the new juggernaut of Web frameworks or was damning it as the scourge of dev
Distributed Hash Tables, Part I | Linux Journal
In the world of decentralization, distributed hash tables (DHTs) recently have had a revolutionary effect. The chaotic, ad hoc topologies of the first-generation peer-to-peer architectures have been superseded by a set of topologies with emergent order, provable properties and excellent performance. Knowledge of DHT algorithms is going to be a key ingredient in future developments of distributed a
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