LSAM Tools

Our primary project deliverable:

The LSAM Proxy Cache (software release)

Some of our tools:

Apache Performance Enhancements. Our investigations in http-server performance revealed some potential optimizations. We describe particular problems and provide patches for Apache, a popular web server.
Logproxy. Logproxy listens to a port for HTTP requests and logs file transfer latencies to a log file. Download.
Tcpdump plot. Tcpdump plot plots the output of tcpdump file in mif or postscript format. Download.
HTTP Server Performance Measurement. This script measures httpd performance by fetching given file(s), given number of times. It then plots three graphs:
- Bandwidth Vs File size
- Start Latency Vs File size
- Transfer Latency Vs File size
Download.
HTTP Server Performance Measurement (version 2). A more mature set of scripts to measure web performance. Information (including download).
Automatic Web Search. This script contacts a web search engine to get results on a specified search topic. It sorts the results and finds unique matches. It creates a main summary page and other pages containing unique results.
Perl API for Web Search Engines.. The WWW::Search library provides a Perl API to Web search engines.
Tcpdump analysis script. This script analyzes tcpdump's output file for HTTP connections and related DNS lookup connections. It prints out these connections if in verbose mode. It also computes the DNS lookup time, open latencies, start latency and transfer latency.
Rate Based Pacing for TCP. This is the source code (SunOS4.1.3) for our implementation of rate based pacing for TCP, part of enhancements to TCP's startup behavior, particularly those relevant to HTTP. For information about pacing, see pointers to papers and web pages about it or Instructions on obtaining the source code.

We have a number of other tools under development. Watch this space or contact LSAM for more details.

LSAM Tools

Our primary project deliverable:

The LSAM Proxy Cache (software release)

Some of our tools: