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Update 2: Michael Galpin in Cache Money and Cache Discussions likes memcached for it's expiry policy, complex graph data, process data, but says MySQL has many advantages: SQL, Uniform Data Access, Write-through, Read-through, Replication, Management, Cold starts, LRU eviction. Update: Dormando asks Should you use memcached? Should you just shard mysql more?. The idea of caching is the most import
1. Tagging and Folksonomy Schema Design for Scalability and Performance Jay Pipes Community Relations Manager, North America (jay@mysql.com) MySQL, Inc. TELECONFERENCE: please dial a number to hear the audio portion of this presentation. Toll-free US/Canada: 866-469-3239 Direct US/Canada: 650-429-3300 : 0800-295-240 Austria 0800-71083 Belgium 80-884912 Denmark 0-800-1-12585 Finland 0800-90-5571 Fr
Introduction to EventMachine's Lightweight Concurrency Concurrent programming in Ruby gains newfound agility with EventMachine (EM), which introduces two concurrency paradigms: spawned processes and deferrables. Understanding deferrables is key to leveraging this model, as outlined in this guide and in-depth within the LIGHTWEIGHT_CONCURRENCY documentation. Understanding Deferrables What are Defer
Update 6: Some interesting changes from Twitter's Evan Weaver: everything in RAM now, database is a backup; peaks at 300 tweets/second; every tweet followed by average 126 people; vector cache of tweet IDs; row cache; fragment cache; page cache; keep separate caches; GC makes Ruby optimization resistant so went with Scala; Thrift and HTTP are used internally; 100s internal requests for every exter
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