Users who are still in the process of testing code on chilkoot, or who might wish to do a comparison between the Y and J systems are encouraged to perform this work as soon as possible. After this change, the purge period on all temporary file-systems on all ARSC hosts will be 10 days. This downtime is required for maintenance of the Butrovich computing facility physical plant. In addition to the facility safety system test, major services will be performed on the computer cooling system and an inspection of the electrical service entrance will be conducted. All associated network and computer systems will be down.
Data migration occurs when the physical filesystem becomes nearly full.
All transfers are automatic and no special actions are required by the user. Migrated files are listed in the normal directory structure, and are identified by an m in the first field of ls -l output. Once DMF is active, quotas on Yukon will be applied according to the same policies that have been in place on chilkoot since cut-over. Quotas apply to data physically on disk, only. They do not apply to data which have been migrated off-line.