upgrade multiple application

[eluser]khuzaimi[/eluser]
/var/www/CodeIgniter_x.x.x/
/system/
/application/
/apps_1/
/apps_2/

if i use this structure, how to upgrade?

[eluser]Michael Wales[/eluser]
You wouldn't have the /system/ folder.

I use the exact same directory structure - so I can run multiple versions of CI and upgrade/downgrade as I know my applications are backwards compatible. I have the following structure:

/ci_1.6.3
/ci_1.6.2
/app_1
/app_2

Each of the applications has their own index.php (the one you would get out of the root directory within the CodeIgniter download). Withing that directory you just define the $system_folder directory pointing to each version of CodeIgniter.

For instance, app_1 might have a $system_folder of ../ci_1.6.3 while app_2 has ../ci_1.6.2

[eluser]khuzaimi[/eluser]
how about i have only 1.6.3 version for multiple apps. can u give me the structure.

following that structure has u gave:
/ci_1.6.3
/ci_1.6.2
/app_1
/app_2

that is app_1 and app_2 outside from /system/