this WILL shrink over time, quite dramatically provided that the disk capacities double every 18 months, no more, no less.
In the 7th 18 month cycle, 96 racks would be in use. In the 15th 18 month cycle, 80% of a single rack would be in use. the 15th cycle is 22.5 years. Not bad for indefinite storage. 22.5 years worth of 1000 cameras on 24x7 in a single rack. In the 17th cycle, a single 3U raid box will hold all the data.
In each cycle, there is exactly 18 months worth of free space.
get a fibre attached lto library, maybe something like an hp 20/700 style machine. 20/700 = 20 drives/700 cartridge capacity. 2gbit/sec fibre channel would easily be able to cope with 90MB/sec. 1gbit/sec fibre SHOULD cope, but i'd stick with 2gbit/sec. 20 drive heads would give you 300MB/sec native xfer rates, so you'd need two fibre connections on the tape library. this would give you a storage capacity of 70TB using lto ultrium in this configuration.
ip cameras or the like on their own dedicated network attached to multiple servers would be good. the servers suck the data from the cameras and throw it out to a SAN. the SAN would have to be quite large initially, but should eventually shrink as time passes.
A standard 42U rack can hold 14 3U RAID boxes + JBOD units. Something like the IBM Profibre DF1100 can control 7 JBOD units, or 80 disks in total. Use multiple of these to get 140 disks into the 42U racks. Use 73GB LP FC-AL drives. This will give you a mirrored capacity of around 5124GB of space per rack. 8TB/day = about 2922TB/year, or 4383TB per 18 months. A years worth of storage is 584 42U racks, while 18 months is 877 racks.
After approximately 17 months, buy 122,780 new LP FC-AL disks(140 disks per rack). The capacity has to be at least double. break the mirror and replace one mirror set with the newer drives and rebuild. Then repeat with the other mirror set. You now have another 18 months of storage in the same amount of space. Repeat this process.
Obviously, you would need disk monkeys on hand to continually change failed disks. You would also need multiple arbitrated loops, possibly connected by a switched fabric.
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this WILL shrink over time, quite dramatically provided that the disk capacities double every 18 months, no more, no less. In the 7th 18 month cycle, 96 racks would be in use. In the 15th 18 month cycle, 80% of a single rack would be in use. the 15th cycle is 22.5 years. Not bad for indefinite storage. 22.5 years worth of 1000 cameras on 24x7 in a single rack. In the 17th cycle, a single 3U raid box will hold all the data. In each cycle, there is exactly 18 months worth of free space.
get a fibre attached lto library, maybe something like an hp 20/700 style machine. 20/700 = 20 drives/700 cartridge capacity. 2gbit/sec fibre channel would easily be able to cope with 90MB/sec. 1gbit/sec fibre SHOULD cope, but i'd stick with 2gbit/sec. 20 drive heads would give you 300MB/sec native xfer rates, so you'd need two fibre connections on the tape library. this would give you a storage capacity of 70TB using lto ultrium in this configuration.
ip cameras or the like on their own dedicated network attached to multiple servers would be good. the servers suck the data from the cameras and throw it out to a SAN. the SAN would have to be quite large initially, but should eventually shrink as time passes. A standard 42U rack can hold 14 3U RAID boxes + JBOD units. Something like the IBM Profibre DF1100 can control 7 JBOD units, or 80 disks in total. Use multiple of these to get 140 disks into the 42U racks. Use 73GB LP FC-AL drives. This will give you a mirrored capacity of around 5124GB of space per rack. 8TB/day = about 2922TB/year, or 4383TB per 18 months. A years worth of storage is 584 42U racks, while 18 months is 877 racks. After approximately 17 months, buy 122,780 new LP FC-AL disks(140 disks per rack). The capacity has to be at least double. break the mirror and replace one mirror set with the newer drives and rebuild. Then repeat with the other mirror set. You now have another 18 months of storage in the same amount of space. Repeat this process. Obviously, you would need disk monkeys on hand to continually change failed disks. You would also need multiple arbitrated loops, possibly connected by a switched fabric.