Monthly Archives: August 2011

HTTP – Hypertext Transfer Protocol

Connected From This HTTP The Hypertext Transfer Protocol (HTTP) is an application-level protocol for distributed, collaborative, hypermedia information systems. It is a generic, stateless, protocol which can be used for many tasks beyond its use for hypertext, such as name servers and distributed object management systems, through extension of its request methods, error codes and …

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httperf – HTTP performance measurement tool

Connected From This A UNIX Command $httperf –hog –server www.youtube.com httperf –hog –client=0/1 –server=www.youtube.com –port=80 –uri=/ –send-buffer=4096 –recv-buffer=16384 –num-conns=1 –num-calls=1 Maximum connect burst length: 0 Total: connections 1 requests 1 replies 1 test-duration 0.787 s Connection rate: 1.3 conn/s (787.4 ms/conn, <=1 concurrent connections) Connection time [ms]: min 787.4 avg 787.4 max 787.4 median 787.5 …

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ASP.NET and Debian HOWTO

Installation 1. apt-get install apache2 2. apt-get install libapache2-mod-perl2 3. apt-get install libapache2-mod-mono configuration 1. /etc/apache2/sites-available/ 2. a2ensite default 3. mkdir -p /srv/www/default/public_html 4. mkdir /srv/www/default/logs 5. put a sample .aspx file in “/srv/www/default/public_html” 6. /etc/init.d/apache2 restart Testing 1. Browser URL — 127.0.0.1/<your .aspx file>

hello.pl —x Prints the message using two different delimeters.

A UNIX Command $cat hello.pl # Prints the message using two different delimeters. print “Hello, world!\n”; print qq=Did you say “Hello?”\n=; $perl hello.pl Hello, world! Did you say “Hello?” $ UNIX Explanation “print” is categorized under Input/Output Functions. Prints the message using two different delimeters. source : http://sandbox.mc.edu/~bennet/perl/leccode/index.html

parameters tcp_retries2

A UNIX Parameter $cat /proc/sys/net/ipv4/tcp_retries2 15 $ Parameter Definition How many times to retry before killing alive TCP connection. RFC1122 says that the limit should be longer than 100 sec. It is too small number. The default value of 15 corresponds to ~ 13 – 30 minutes, depending on RTO. Parameter Code Internals snippet 1 …

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