Messages in this thread |  | | Date | Wed, 6 Dec 2000 22:16:39 -0800 | From | Brian Pomerantz <> | Subject | Re: 64bit offsets for block devices ? |
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On Wed, Dec 06, 2000 at 10:07:57PM -0600, Peter Samuelson wrote: > > > Don't you think that we will run into problems anyway because soon > > there will be raid systems with a couple of Terrabytes of space to > > waste for mp3's ;-) > > A couple of terabytes is fine. That's 32 bits of blocks. *More* than > that, now, we've got a problem. >
Which is exactly what we're going to be dealing with "real soon now". I'm going to be putting together a RAID system with between 1.7-5.1TB by February. This will be seen as a single block device to clients via a network block device (more than likely it will be 16 Ciprico Rimfire 7000's spread across 4 nodes via a Quadrics switch). So, what I'm seeing right now is that I won't be able to address this amount of space with a single block device. By the summer of 2001 we could be looking at putting together 10-150TB (depends on budget and need) of disk space for a production cluster and it would be nice if our parallel filesystem could span that entire space with a single image.
That being said, has anyone started making changes to accommodate large devices like this in the block layer, at least on 64bit architectures? I don't think we are seriously considering anything other than Alphas at this point.
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