James Mello wrote: > > > Petabytes are another matter entirely. If you must absolutely have that > > > much data backed up, you start looking at more exotic solutions. Backing > > > up solely to disk is *way* to expensive, hence the wonderful, but of > > > poorly implemented idea of HSM.... Disk and tape :) > > > > Yes, HSM has never panned out the way it was supposed to. > > However, try backing up Petabytes with tape in a reasonable > > amount of time. While I've never configure such a system, > > the numbers from systems I have seen indicate that disk is > > much cheaper than tape (even if tape is a feasible solution > > because of speed). > > HSM systems that I've seen work generally used some form of nearline disk > storage and an *HUGE* array of tape drives to write too (100+ tape > drives). The data went to near line storage (which they only held for > like 24 hours) and was then written to the tape. The deal is, the more > data you *must* save, the more money you *must* spend. Agreed. I've never had good luck keeping HSM systems up for very long. The ones I have experience with liked to lock up at least once a week and the software never liked to be restarted - had to reboot the whole box. Jeff > > > _______________________________________________ > linux-lvm mailing list > linux-lvm@sistina.com > http://lists.sistina.com/mailman/listinfo/linux-lvm > read the LVM HOW-TO at http://www.sistina.com/lvm/Pages/howto.html _______________________________________________ linux-lvm mailing list linux-lvm@sistina.com http://lists.sistina.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://www.sistina.com/lvm/Pages/howto.html
