Results tagged “r” from manAmplified

Two quick unix commands that will clean a Squid log file for import into R. Very useful when you need to fine tune your cache strategy.

Well, I like them alot. These are things that I use daily, or am damn glad I have when I need them.

Quick note on using box plots to show arrival rates during specified interval periods.

Below are a few R functions I use to evaluate and tune our Squid caches, which we use in accelerator mode. The functions work by taking a real stream of requests from either an application or squid log. From there the arrival rate can be determined at every second. Or a filter can be applied and the cache hit ratio or arrival rate re-determined. Or better yet, the series can be filtered a number of times with different filter values to determine the best value for a given filter.

If you work with distributed systems, HTTP referenceable services, and specifically caching systems, you probably should check out On the Intrinsic Locality Properties of Web Reference Streams.

R 2.0 for MacOS X has been released.

Some online courses for statistical data analysis with references to R.