From: ADSM: Dist Stor Manager [mailto:[EMAIL PROTECTED] On Behalf Of Richard Sims > Speaking from experience running HSM on AIX JFS for many years: > Applied to a file system, HSM turns it into the slowest you've ever > experienced, even on the fastest RS/6000 and disk systems.
I just want to toss in my two cents on a procedural issue: HSM is a legacy infrastructure that was originally implemented for mainframe systems 50 years ago. It was built in a day when hard disk was horrendously expensive and required impressive physical resources to maintain. (Old HDs were a big reason why raised floors were originally made from preformed concrete.) Anyway, in these days of decent cheap disk getting cheaper and more decent all the time, HSM's day is pretty much past despite attempts to implement it for Microsoft OSs (which is a lost cause). If you need more storage, buy it. If you need to move seldom-accessed files to cheaper disk (which IS a legitimate goal), use something like IBM's TPC for disk to ferret out such files and move 'em. Or (even better) archive 'em with TSM with a long retention period. Why would anyone want to implement an infrastructure that turns your computer system to the cybernetic equivalent of the village idiot? -- Mark Stapleton System engineer Berbee, a CDW company www.berbee.com
