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Package mod_qos

Quality of service module for Apache


The mod_qos module may be used to determine which requests should be served and
which shouldn't in order to avoid resource over-subscription. The module
collects different attributes such as the request URL, HTTP request and response
headers, the IP source address, the HTTP response code, history data (based on
user session and source IP address), the number of concurrent requests to the
server (total or requests having similar attributes), the number of concurrent
TCP connections (total or from a single source IP), and so forth.

Counteractive measures to enforce the defined rules are: request blocking,
dynamic timeout adjustment, request delay, response throttling, and dropping of
TCP connections.

Version: 11.74

General Commands

mod_qos quality of service module for the Apache Web server
qsdt qsdt calculates the elapsed time between two related log messages.
qsexec parses the data received via stdin and executes the defined command on a pattern match.
qsfilter2 an utility to generate mod_qos request line rules out from existing access/audit log data.
qsgeo an utility to lookup a client's country code.
qsgrep prints matching patterns within a file.
qshead an utility reading from stdin and printing all lines to stdout until reaching the defined pattern.
qslog collects request statistics from access log data.
qslogger another shell command interface to the system log module (syslog).
qspng an utility to draw a png graph from qslog(1) output data.
qsre qsre matches a regular expression against test strings.
qsrespeed Tool to compare / estimate the processing time for (Perl-compatible) regular expressions (PCRE).
qsrotate a log rotation tool (similar to Apache's rotatelogs).
qssign an utility to sign and verify the integrity of log data.
qstail an utility printing the end of a log file starting at the specified pattern.