Remodeling Four Kitchens: A look inside our new brand
With the additions of Advomatic and Manatí, we’ve had an exciting few years at Four Kitchens. While we’ve remained fundamentally the same organization, we’ve also been evolving into something new. It’s time for our brand to catch up.Learn more
A more modern, sustainable approach to higher ed websites with YaleSites
A higher ed website is a product, not a project. Learn about Yale’s sustainable approach to digital development and how your team can do the same.Learn more
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Intelligent memcached and APC interaction across a cluster
Anyone experienced with high-performance, scalable PHP development is familiar with APC and memcached. But used alone, they each have serious limitations: APC Advantages Low latency No need to serialize/unserialize items Scales perfectly with more web servers Disadvantages No enforced consistency across multiple web servers Cache is not shared; each web server must generate each item memcached Advantages Consistent across multiple web servers Cache is shared across all web servers; items only need to be generated once Disadvantages High latency Requires serializing/unserializing items Easily shards data across multiple web servers, but is still a big, shared cache Combining the two Traditionally, application developers simply think about consistency needs. If consistency is unnecessary (or the scope of the application is one web server), APC is great. Otherwise, memcached is the choice. There is, however, a third, hybrid option: use memcached as a coordination system for invalidation with APC as the main item cache. This functions as a loose L1/L2 cache structure. To borrow terminology from multimaster replication systems, memcached stores "tombstone" records.
David’s epic presentation megapost
UPDATE 2009-06-08: You can download these slide decks (and more!) from our Presentations page. --The Web Chefs DrupalCamp Stockholm 2009 Is Drupal secure: the Drupal project's responses to the web's most common software vulnerabilities Scalable Drupal infrastructure: a guide to planning, deploying, and scaling big websites Drupalcon DC 2009 Building infrastructure you can scale, monitor, and maintain The next 10 Years: the future of application scalability and responsiveness
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