All accounts have an allocation amount and expiration date. Each job is charged to the account on midnight of the day it completes. The showusage command displays the current account balance as of the last update. More details can be found on the Job Accounting page.
Expired Accounts
When an account expires, it may no longer be used to run jobs on Kraken. Project data stored in HPSS and NFS directories will be kept for a grace period of 12 months. Note that data on all NICS scratch systems will be purged every 30 days.
Overdrawn Accounts
On Kraken, user accounts may be used to run jobs until the end of the allocation term, even if it has a negative account balance. Jobs submitted from an overdrawn account, however, will be given the lowest priority for scheduling. In general, these jobs only run when the machine would otherwise be idle, and should not affect the scheduling of other jobs. The ability to run jobs in a timely manner with an overdrawn account will depend on the job size and machine usage.
Overdrawn accounts are charged at a 95% discount, therefore no refunds will be granted. Regardless, if you believe that a job failed due to issues external to the input and code, please let us know (help@xsede.org). This helps us find and track issues, and improve quality of service.
Note: Capability jobs will not be allowed to run using an account that has a negative balance.
Requesting Additional Resources
If an XSEDE project has used service units more rapidly than expected, a PI may request a supplemental allocation through the XSEDE allocation process. Supplemental allocations provide additional resources for an existing account. For up to date information about XSEDE allocation policies, see Allocations Policies.
For Director's Discretionary accounts, a PI may request a supplemental allocation at the Director's Discretionary Account Request Form.
