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Technology Stocks : Silkroad
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To: Frank A. Coluccio who wrote (505)8/22/1999 11:09:00 AM
From: Sector Investor  Read Replies (1) of 626
 
<<I would differ with your assessment on this for some situations, for several reasons. A file rated at 300 GB, or 2.4 Tb can be sent cross country over a dedicated (or virtual) connection rated at OC-3c (a 155 Mb/s envelope with an average effective throughput of roughly 100+ Mb/s after all overheads including retransmissions of errored blocks/packets are accounted for) in under seven (7) hours from beginning to end. >>

Frank, my point is that FIRST it has to be READ from a storage device (limitations there), passed through a server bus or mainframe ESCON channel (limitations and contention there), packetized, transmitted, and rewritten at the other end.

The weakest link in a chain defines it's strength. If the effective throughput storage I/O (including time to mount mult-cartridges) or the bus/channel the data passes through is slower than OC-3, you aren't going to get that speed.

I am trying to distinguish between already aggregated packetized data flows and a FILE stored somewhere where processing has to be done IN ADDITION to packet transmission.

Believe me, you can't process a 300GB file even on a dedicated mainframe at anywhere close to that speed. On a mainframe that could require around 100 physical tape cartridges (assuming sequential data and figuring 3GB/tape) - each having to be rewound and dismounted before the next one can be read. What kind of server device can handle a file that size and how fast?

This discussion started because I think I read earlier in the thread about moving FILES using the Silkroad technology and getting those speeds. Not for many years yet.
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