Simon Willison’s Weblog

Blogmarks tagged scaling, memcache in Jan, 2009

Filters: Type: blogmark × Year: 2009 × Month: Jan × scaling × memcache ×


Sharding Counters on Google App Engine. “While the datastore for App Engine scales to support a huge number of entities it is important to note that you can only expect to update any single entity, or entity-group, about five times a second”. This article explains a technique for sharding writes across multiple counters in detail, including a way to keep a memcache counter updated at the same time for faster reads. # 27th January 2009, 8:27 pm

MemcacheDB. A server that speaks the memcache protocol but uses Berkeley DB for reliable persistent storage. Speedy: 20,000 writes/second and 60,000+ reads/second. Includes a full replication mechanism (with custom memcache protocol commands) based on Berkeley DB’s. # 5th January 2009, 12:37 pm