How do I request supplemental service units for an XSEDE allocation?

To request additional service units (SUs) to supplement a current Extreme Science and Engineering Discovery Environment (XSEDE) allocation, the principal investigator (PI) or co-PI can use the Partnership Online Proposal System (POPS), accessible via the XSEDE User Portal, to submit a supplemental allocation.

A supplemental allocation is a request for additional resources during an existing allocation's one-year time frame. Its purpose is to support projects that are proceeding more rapidly, or requiring more resources, than anticipated. The supplemental allocation is added to a project's current allocation, and expires at the end of the project's allocation period.

Requests are accepted at any time, and are generally reviewed within two to three weeks of submission, but larger requests are reviewed at the next meeting of the XSEDE Resource Allocations Committee (XRAC). To submit a supplemental allocation request:

1. Log into the XSEDE User Portal.
   
   
2. On the Allocations tab, click Submit/Review Request.
   
   
3. On the "Welcome to POPS" page, click Click to Enter or View a Request, and then select Supplemental.

For more about submitting a supplemental allocation request, including required documentation, see "Section 3.5.3 Supplemental Requests" on the XSEDE Allocation Policies page.

Note: Supplement awards are highly dependent upon availability of resources, and limited when allocation awards at the previous XRAC meeting have been reduced to eliminate oversubscriptions.

This document was developed with support from National Science Foundation (NSF) grant OCI-1053575. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the NSF.

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