Mod - Bandwidth mod

The mod works as an output filter in the apache filters chain.
When a user start downloading something, the data goes through the mod. If there is a bandwidth limit, then the mod will start "splitting" the data into smaller pieces. Then it will start sending each piece with a small delay (less than 1 sec) between each piece, thus, reducing the speed the user downloads. This is useful for small web-hosting servers with limited outbound bandwidth (i.e. ADSLs customers).

Step 1

root# wget http://bwmod.sourceforge.net/files/mod_bw-0.7.tgz
root# tar -xvf mod_bw-0.7.tgz
root# cd mod_bw-0.7

Download and extract the file

Step 2

root# vi mod_bw.c

/* Compatibility for ARP < 1 */
/*
#if (APR_MAJOR_VERSION < 1)
#define apr_atomic_inc32 apr_atomic_inc
#define apr_atomic_dec32 apr_atomic_dec
#define apr_atomic_add32 apr_atomic_add
#define apr_atomic_cas32 apr_atomic_cas
#define apr_atomic_set32 apr_atomic_set
#endif
*/

Comment this part in mod_bw.c
It help to avoid the bug for next step.

root# apxs -i -a -c mod_bw.c

To execute the module of mod_bw

root# cat /etc/httpd/conf/httpd.conf |grep mod_bw
LoadModule bw_module /usr/lib/httpd/modules/mod_bw.so

Then you can see the module is loaded in apache if it is sucessed.

root# vi /etc/httpd/conf/httpd.conf
# Limit BW usage
BandWidthModule On
ForceBandWidthModule On
#Set Bandwidth all 20M for total collection
Bandwidth all 20480000
#Set Bandwidth all 2M for each connection minimum
MinBandwidth all 2048000

Edit httpd.conf and add this to Directory which bandwidth limitation is required.