MySQL and Memcached: End of an Era? - High Scalability -
If you look at the early days of this blog, when web scalability was still in its heady bloom of youth, many of the articles had to do with leveraging MySQL and memcached. Exciting times. Shard MySQL to handle high write loads, cache objects in memcached to handle high read loads, and then write a lot of glue code to make it all work together. That was state of the art, that was how it was done. T
Scaling Twitter: Making Twitter 10000 Percent Faster - High Scalability -
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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