Warning: This is not a very interesting post. I’m toying around with the Redis benchmarking tool. What would be significantly more interesting would be to toy around with the Lua API in Redis, which I’ll do in a subsequent post. In this post, I’ll try to squeeze as many get/set requests out of Redis as …
How many requests per second can I get out of Redis? Read More »
The profiling tool in GNU is called gprof. Here is a short, boring example of how to use it. 1) Write hello world in C (hello.c) #include <stdio.h> int foo() { int b = 54324; int j; for (j=0; j < 1000000; j++) { b = b^j; } return b; } int main() …
Simple. This works.
The two main things to do with a memcached cluster is getting a key and setting a key to a value. Below are examples of this, with parameters explained (something most examples miss for some reason?). Examples Connect to memcached: telnet [hostname] [port] telnet localhost 11211telnet localhost 11211 Getting a key: get [key] get foo …
Summary of memcached commands as used through telnet Read More »
In the following I’m using a server from Webfaction, and my Tornado source code is hosted on Github. Some things are specific to those providers, but should be very easy to adapt. The following is organized into two sections.
To build nginx on Mac OS X Snow Leopard, I use the following options to configure ./configure –with-ld-opt="-L/usr/local/lib" –with-cc-opt="-I/usr/local/include"./configure –with-ld-opt="-L/usr/local/lib" –with-cc-opt="-I/usr/local/include" If the ld and cc options are not given, it results in an error reported in a ticket on the nginx trac. Notice that the is no space between -L and /usr/local/lib and likewise …
To benchmark a HTTP server, you can use the command-line utility Apache Bench (command ab). If you have Python installed, you can start a HTTP server, e.g. running on port 10000, in any directory of your system. It will serve the files in that directory and sub-directories. Start it like this: $ python -m SimpleHTTPServer …
Testing performance of HTTP server with Apache Bench Read More »
I use two ways to manage paths in Mac OS X: ~/.profile /etc/paths.d I use the first option when trying things out, and the second for managing the path more permanently. Example And example of the using /etc/paths.d to include the git executable in PATH: edit /etc/paths.d/git Add line: /usr/local/git/bin When you start a new …
You have a file sitting on your disc. You want to put a copy of the contents in your OS “clip board” so that you can paste it somewhere, e.g. on a website, without having to open the file in a text editor, selecting everything and hitting the COPY key combination, say Command-C on a …
This blog post is made as a “note-to-self” so that I can remember the procedure. You are of course welcome to read along. It’s does nothing fancy, simply imports the planet.osm file into PostGIS using Osmosis with the Snapshot Schema. Step by step Assuming Osmosis is installed (if not download osmosis), and a planet.osm file …