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From salil GK <>
Subject Re: Help regarding traffic_cts
Date Tue, 28 Mar 2017 15:43:45 GMT
Thanks Alan for the reply

I have done changes to traffic manager source to support two instances of
traffic server to run in the system.
Now I can see two different set of .../var/ files are created the moment I
run traffic_manager. It includes three .sock files too.
I was trying to find out where exactly the IPC call happens from
traffic_control. Could you please help me understand the call sequence from
traffoc_control on how this IPC works - like which library function is
doing this work ? I assume that it is just delivering some message from
traffic_ctl to traffic_manager ( ? )


On 28 March 2017 at 20:34, Alan Carroll <>

> traffic_ctl does IPC over a UNIX pipe to communicate with traffic_manager
> which will, if needed, communicate with traffic_server. The file name of
> the pipe is a compile time constant in traffic_ctl and traffic_manager.
> Therefore which Traffic Server instance is affected is based on which
> traffic_ctl binary you use.
> On Monday, March 27, 2017, 8:12:56 PM CDT, salil GK <>
> wrote:
> Hi
>   I have a doubt regarding the traffic_ctl command. In my setup I am
> running two instances of traffic server. This I am doing by specifying two
> different directories for configuration. Now when I run traffic_ctl  how do
> I control the configuration reload. I mean traffic_ctl need to read the
> correct configuration file and update the variables of respective instance.
> How do I do this ?
> How does the trffic*ctl update the configuration variables
> of traffic_server* – is it some IPC mechanism ?
> Thanks
> ~S

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