I added support to mmapplypolicy & co for HPSS (and TSM/HSM) years ago.
AFAIK, it works pretty well, and pretty much works in a not-too-surprising way. I believe that besides the Spectrum Scale Admin and Command docs there are some "red book"s to help, and some IBM support people know how to use these features. When using mmapplypolicy: a) Migration and pre-migration to an external pool requires at least two rules: An EXTERNAL POOL rule to define the external pool, say 'xpool' and a MIGRATE ... TO POOL 'xpool' rule. b) Migration between GPFS native pools requires at least one MIGRATE ... FROM POOL 'apool' TO POOL 'bpool' rule. c) During any one execution of mmapplypolicy any one particular file will be subject of at most one MIGRATE rule. In other words file x will be either (pre)MIGRATEd to an external pool. OR MIGRATED between gpfs pools. BUT not both. (Hmm... well you could write a custom migration script and name that script in your EXTERNAL POOL rule and do anything you like to each file x that is chosen for "external" MIGRATion... But still just one MIGRATE rule governs file x.)
_______________________________________________ gpfsug-discuss mailing list gpfsug-discuss at spectrumscale.org http://gpfsug.org/mailman/listinfo/gpfsug-discuss
