Allocation Expiration Policy

LCRC is very heavily used, so the computer time your project has been given is a valuable resource. All LCRC allocation requests are in units of core-hours, where the request is for computer time that will be completely used within the current fiscal year (October 1st through September 30th). It is also assumed that the allocation will be used fairly evenly throughout the fiscal year, unless otherwise stated in the proposal.

For large projects (currently projects larger than 200,000 core-hours), half of the time granted by the Allocations Committee will be deposited into the project bank on October 1st, and the other half on April 1st. For small projects (200,000 core-hours or less for a fiscal year), all the time granted by the Allocations Committee for that fiscal year is deposited into the project bank on October 1st (or when the project is first created).

At the end of each quarter (beginning March 31, 2011) any remaining time that should have been used in that quarter will be removed from your bank and returned to the pool for reallocation to other projects. This will help the Allocations Committee to make the best decisions about use of the system.

Here are a couple of examples that illustrate the allocation expiration policy.

Project A

  1. Requested: 500,000 core-hours
  2. Granted: 400,000 core-hours
  3. October 1 Bank Deposit: 200,000 core-hours. At least 100,000 hours must
    be used in the first quarter, or the difference is lost.
    For example, if only 70,000 hours are used in the first quarter, then 30,000 hours
    will be removed from that project at the end of that quarter.
    The other 100,000 hours must be used in the second quarter, or the balance is lost.
  4. April 1 Bank Deposit: 200,000 core-hours. At least 100,000 hours must be used in the third quarter, or the difference is lost. The other 100,000 hours must be used in the fourth quarter, or the balance is lost.

Project B

  1. Requested: 80,000 core-hours
  2. Granted: 80,000 core-hours
  3. October 1 Bank Deposit: 80,000 core-hours. At least 20,000 hours must be used in each quarter, or the difference is lost.
Allocation Expiration Policy Sidebar