I just bought 10TB for $4.5/GB. That's 5 4U systems, each with 16 160GB drives and one GigE interface. A couple similar systems in my lab (14 100GB drives) benchmark at 110 MB/sec reading, 85 MB/sec writing with software RAID5. With NFS over GigE, I can get 50 MB/sec sustained before PCI bus contention starts to be a problem. You can almost certainly spend less money if you try hard enough, but I wanted systems that wouldn't need 24x7 handholding :-). Scott On Thu, 7 Feb 2002, Richard Barbara wrote: > > Does anyone have an opinion as to what the cost of storage should be (say > in $ /Gbyte) to enable wider use of 'direct to disk' backup? > Would tape emulation help in this issue? > > ---------- > > From: Jeff Layton <laytonjb@bellsouth.net> > > To: linux-lvm@sistina.com > > Subject: Re: [linux-lvm] Backup costs (was: LVM reimplementationre) > > Date: Thursday, 7 February 2002 13:04 > > > > James Mello wrote: > > > > > > Large amounts of data brings in even more issues. How do > > > > you stream Petabytes of data to tape in a resonable of time? > > > > Unless you spend HUGE amounts of money to buy multiple > > > > silos to handle slices of the data and put in a fantastic network > > > > to handle the traffic, you can't backup in a reasonable amount > > > > of time. In this case, disk is your only choice. The data size > > > > break point between disk and tape depends on lots of things, > > > > but that point is moving downward all the time (perhaps in > > > > the Terabyte range). > > > > > > 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). > > > > Jeff > > > > > > > > > > -- Cheers > > > -- James > > > > > > _______________________________________________ > > > 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 > > _______________________________________________ > 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
