[Asterisk-Users] (Semi-OT) QoS Question FTP Living with Asterisk

[Kristian Kielhofner]

Steve Totaro wrote:
> I have searched google and came up with too many options and packages 
> that may or may not work for my needs, most articles seem to be for 
> setting up routers.  Maybe someone on the list can give me some better 
> insight.
> 
> I have monitoring turned on my "shift eight (tm)" (Asterisk ;-)) box for 
> all calls.  We have over one hundred agents and tons of recordings in 
> wav format.  I also have a cron job that runs a script to mux the in and 
> out files and ftp them to a NAS device and it runs every five minutes.
> The NAS device and the * box are both directly connected to a Cisco 
> Gigabit switch.  I have had complaints of calls fading in and out and 
> also cutting off.  After reviewing the recordings, some of these 
> complaints seem valid and I suspect the sheer bandwidth of the FTP 
> traffic is causing the issues.  I also run nagios checks on the box and 
> get ping warnings on a regular basis.
> My question is, how can I throttle the FTP (Standard with dist) 
> transfers using out of the box CentOS4.3 (or any easy to use, low 
> learning curve package)?  I thought about FTPing the files at less 
> frequent intervals but that just makes the issue less frequent but last 
> longer.
> I would like to accomplish throttling FTP on the Linux box with a 
> solution that is not too elegant since this is a production machine in a 
> busy call center.  If I cannot do it on the * box I guess my next step 
> is to see if the Cisco Gigabit switch has any QoS functionality.
> Thanks,
> Steve
> _______________________________________________

Steve,

	If you don't want to get too fancy, you should switch to using rsync 
(if possible) and use the "--bwlimit" option.  If you MUST use ftp, try 
using trickle:

http://monkey.org/~marius/pages/?page=trickle

	I haven't used it, but you should be able to call your FTP upload 
binary (whatever it may be) with it and force a lower transfer speed.

Let us know how it goes!

-- 
Kristian Kielhofner