Slides and notes from my three hour Redis tutorial

The PyCon live stream we did was a pretty good case study. We pretty much hacked together a pub/sub system on top on BLPOP, so it'd be even easier going forward. Hopefully we'll open source it :/ (we've been meaning to for a while now...)

Hey, a few uses I'm aware of:

StudiVZ and Craigslist are using multiple Redis nodes as a fast meta-data store. The Boxcar push notifications app for iPhone is Redis-based. Engine Yard is using Redis in multiple ways. Github as messaging system. I'm also aware of many other istalls in a lot of companies, what I'm loving about how things are going with Redis is that's considered more and more like a facility you use every time you need it so it's a tool in many companies. It's a bit hard to track the usages often.

This was on HN a few weeks ago - A Collection Of Redis Use Cases [http://news.ycombinator.com/item?id=1129136]

It's up to you to manually maintain both of those sets, which means the information about what is tagged with what ends up stored twice and there's a risk that it could get out of sync.

I don't know, but remember that redis writes aren't hitting the disk synchronously.

Writes can be faster if you don't have to write through to a slower media; also it would be faster if you can append to the end rather than seek to a specific location. Seeking takes up the majority of the time spent doing disk IO (not talking about SSDs).