On Thu, Jun 9, 2011 at 12:41 PM, Ian Holsman <had...@holsman.net> wrote: > Hi. > > I had a brief look at CASSANDRA-2103 (expiring counter columns), and I was > wondering if anyone can help me with my problem. > > I want to keep some page-view stats on a URL at different levels of > granularity (page views per hour, page views per day, page views per year etc > etc). > > > so my thinking was to create something a counter with a key based on > Year-Month-Day-Hour, and simply increment the counter as I go along. > > this work's well and I'm getting my metrics beautifully put into the right > places. > > the only problem I have is that I only need the last 48-hours worth of > metrics at the hour level. > > how do I get rid of the old counters? > do I need to write a archiver that will go through each url (could be > millions) and just delete them? > > I'm sure other people have encountered this, and was wondering how they > approached it.
Here's how we are going to do it at twitter: https://issues.apache.org/jira/browse/CASSANDRA-2735 -ryan
