The power of GPFS callbacks

Today's increadably neat discovery? GPFS callbacks. I know these have been around for a while but until a suggestion from one of my colleagues prodded me into reading the documetation, I hadn't realised just how many things you can do with them.

My immediate ideas include: starting and stopping the batch software when its spool file system mounts or unmounts; automatically exporting file systems via NFS to other systems; requesting hardware replacements when the declustered arrays reach their maximum number of failures; raising alerts on reconstruct failures; and those are just my first ideas. The potential opportunities for laziness, impatience and hubris are vast!