I just noticed the 2.43 RAIT capabilites in the docs directory, and wondered if anyone has set this up with decent high capacity drives (LTO AIT, SDLT)? (5 x SDLT 160 = ~640GB )
Is performance 4 x the single drive? (with a 5 drive setup) Is there any significant performance penalty for calculating the parity (CPU load/speed)? Are you comfortable with it? Do all of the tools work with it (amverify, amrecover, amcheck, amadmin )? In the event of a restore/diaster, does the tape drive order matter (ie - lets say a restore to another box is required, do I have to have the same tape numbers for the drives in the changer configuration, with the tapes placed in their respective drives, or can amanda figure out data/parity just based upon labels/configuration.) Sorry to be such a leach, but I don't have 5 tape drives. (yet) BTW - I'm using amanda as a backup system for about 50 systems in a trading floor environment, and have been thrilled with the quality of the software. IMHO - it's as good as netbackup for regular filesystem dumps, and if this rait stuff gets more integrated with the changers, that's going to make the tape size limitation less of a nuisance. --Adrian
