11.6. Scaling an Application Manually

Procedure 11.1. To Scale an Application Manually:

1. View the cartridges associated with a scalable application with the following command:

   $ rhc app show App_Namerhc app show App_Name

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   Example 11.7. Showing a Cartridge's Information

   $ rhc app show hybrid
   hybrid @ http://hybrid-automobile.example.com/ (uuid: fjoe04cabdc4efa8f2513a21e2ed27d)
   -----------------------------------------------------------------------------
     Domain:  	automobile
     Created: 	11:48 AM
     Gears:   	1 (defaults to small)
     Git URL: 	ssh://fjoe04cabdc4efa8f2513a21e2ed27d@hybrid-automobile.example.com/~/git/hybrid.git/
     SSH:     	fjoe04cabdc4efa8f2513a21e2ed27d@hybrid-automobile.example.com
     Deployment:	auto (on git push)
   
     php-5.4 (PHP 5.4)
     -----------------
       Scaling: x1 (minimum: 1, maximum: available) on small gears
   
     haproxy-1.4 (OpenShift Web Balancer)
     ------------------------------------
       Gears: Located with php-5.4
   

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   Locate the scaling cartridges as required. The example shows that the php-5.4 cartridge is scaling.
2. Set the minimum and maximum amount of gears the cartridge can use for scaling with the following command, specifying the application name and minimum and maximum number of gears:

   $ rhc cartridge scale Cart_Name -a App_Name --min Min_Gears --max Max_Gearsrhc cartridge scale Cart_Name -a App_Name --min Min_Gears --max Max_Gearsrhc cartridge scale Cart_Name -a App_Name --min Min_Gears --max Max_Gearsrhc cartridge scale Cart_Name -a App_Name --min Min_Gears --max Max_Gearsrhc cartridge scale Cart_Name -a App_Name --min Min_Gears --max Max_Gearsrhc cartridge scale Cart_Name -a App_Name --min Min_Gears --max Max_Gearsrhc cartridge scale Cart_Name -a App_Name --min Min_Gears --max Max_Gearsrhc cartridge scale Cart_Name -a App_Name --min Min_Gears --max Max_Gears

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   Example 11.8. Setting the Maximum and Minimum Amount of Gears for a Cartridge

   $ rhc cartridge scale php -a hybrid --min 1 --max 10
   Setting scale range for php ... done
   
   php-5.4 (PHP 5.4)
   -----------------
     Scaling: x1 (minimum: 1, maximum: 10) on small gears
   

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