3 items tagged “counters”
2009
Using Mongo for Real-Time Analytics. MongoDB supports an “upsert” query, which when combined with the $inc operator can cause counter fields to be incremented if they exist and created otherwise. This makes it a great fit for real-time analytics applications (one increment per page view), something that regular relational databases aren’t particularly good at.
Rate limiting with memcached
On Monday, several high profile “celebrity” Twitter accounts started spouting nonsense, the victims of stolen passwords. Wired has the full story—someone ran a dictionary attack against a Twitter staff member, discovered their password and used Twitter’s admin tools to reset the passwords on the accounts they wanted to steal.
[... 910 words]2008
App Engine Fan: Efficient Global Counters. Implementing efficient counters in Google App Engine, using shards and/or memcached.