...
Allocations requests are typically awarded within two weeks, often times much sooner.
If you are running out of allocations during the course of your class, you can request supplementation credits.
One would submit a supplement request for additional SUs. To begin the supplement process, login to the XSEDE portal at portal.xsede.org and click on "Submit/Review Request" under the "Allocations" tab. The next screen will display the approved allocation with the action for "Supplement". Once the supplement is submitted, it will be reviewed by site representatives and a separate notification will be sent once it is reviewed.