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Oracle Tips by Burleson |
Disk I/O Tuning
Chapter 2: IEEE1394
Interface
IEEE1394, like SCSI, is a peer-to-peer interface. This allows, for
example, dubbing from one camcorder to another without a computer.
It also allows multiple computers to share a given peripheral
without any special support in the peripheral or the computers. It
is a result of all of these features that IEEE1394 has become the
digital interface of choice and its acceptance is growing.
IEEE1394 a, in its peer-to-peer bus topology, allows 100 to 400 Mbps
data transfer rates for up to 63 nodes, allowing 16 hops at 4.5
meters per hop. IEEE1394 also allows for isochronous and
asynchronous data transfer A/V, storage, printing, scanning, TCP/IP
networking.
IEEE1394 b allows for higher speeds and longer distances. IEEE1394 b
is completely compatible with IEEE1394 a providing up to 800 Mbps to
3200 Mbps data transfer over 4.5 meter copper and 100 Mbps over 100
meter copper. If used with Category 5 UTP wiring you can get 400
Mbps over 100 meter plastic optical fiber and 3200 Mbps over 100
meters of glass optical fiber. Each standard copper IEEE1394 bus
can have a maximum 72 m of cables with no more than 4.5 m between
each device/node (Bridges can expand this network). Virtually any
device can be connected (drives, camcorders, UPS, lights, etc).
The above text is
an excerpt from:
Oracle Disk I/O Tuning
Disk IO Performance & Optimization for Oracle
Databases
ISBN
0-9745993-4-4
by Mike Ault
Oracle Consulting
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