Be aware that there is a "screen" session running with each of the
services. If you go to the appropriate screen in the screen session and
then "Ctrl-C" therein and hit up arrow return, you'll basically be
restarting just that service.

This may be out of date but give it a try:

http://www.rushiagr.com/blog/2013/06/05/linux-screens-in-devstack/

On Wed, Sep 2, 2015 at 6:39 PM, Sumanth Sathyanarayana <
[email protected]> wrote:

> Hi,
>
> I am relatively new to openstack and devstack and wanted to know if there
> is any easy way to build devstack, every time I change a class or a python
> file in /opt/stack/*
> If I just compile that particular python file which has been changed (say
> in Horizon - /opt/stack/horizon/*), it doesn't get reflected until I run
>  unstack.sh and again run stack.sh.
>
> Thanks & Best Regards
> Sumanth
>
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