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Build Your Own Oracle RAC 10g Release 2
Cluster on Linux and FireWire
by Jeffrey Hunter - OTN
RAC Firewire
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Developed by
Apple Computer and Texas Instruments,
FireWire is a cross-platform
implementation of a high-speed serial
data bus. With its high bandwidth, long
distances (up to 100 meters in length)
and high-powered bus, FireWire is being
used in applications such as digital
video (DV), professional audio, hard
drives, high-end digital still cameras
and home entertainment devices. Today,
FireWire operates at transfer rates of
up to 800 megabits per second while next
generation FireWire calls for speeds to
a theoretical bit rate to 1,600 Mbps and
then up to a staggering 3,200 Mbps.
That's 3.2 gigabits per second. This
speed will make FireWire indispensable
for transferring massive data files and
for even the most demanding video
applications, such as working with
uncompressed high-definition (HD) video
or multiple standard-definition (SD)
video streams.
The following
chart shows speed comparisons of the
various types of disk interfaces. For
each interface, I provide the maximum
transfer rates in kilobits (kb),
kilobytes (KB), megabits (Mb), megabytes
(MB), and gigabits (Gb) per second. As
you can see, the capabilities of
IEEE1394 compare very favorably with
other available disk interface
technologies.
| Disk Interface |
Speed |
| Kb |
KB |
Mb |
MB |
Gb |
| Serial |
115 |
14.375 |
0.115 |
0.014 |
|
| Parallel (standard) |
920 |
115 |
0.92 |
0.115 |
|
| USB 1.1 |
|
|
12 |
1.5 |
|
| Parallel (ECP/EPP) |
|
|
24 |
3 |
|
| SCSI-1 |
|
|
40 |
5 |
|
| SCSI-2 (Fast SCSI / Fast
Narrow SCSI) |
|
|
80 |
10 |
|
| ATA/100 (parallel) |
|
|
100 |
12.5 |
|
| IDE |
|
|
133.6 |
16.7 |
|
| Fast Wide SCSI (Wide SCSI) |
|
|
160 |
20 |
|
| Ultra SCSI (SCSI-3 / Fast-20
/ Ultra Narrow) |
|
|
160 |
20 |
|
| Ultra IDE |
|
|
264 |
33 |
|
| Wide Ultra SCSI (Fast Wide
20) |
|
|
320 |
40 |
|
| Ultra2 SCSI |
|
|
320 |
40 |
|
| FireWire 400 - IEEE1394(a) |
|
|
400 |
50 |
|
| USB 2.0 |
|
|
480 |
60 |
|
| Wide Ultra2 SCSI |
|
|
640 |
80 |
|
| Ultra3 SCSI |
|
|
640 |
80 |
|
| FireWire 800 - IEEE1394(b) |
|
|
800 |
100 |
|
| Serial ATA - (SATA) |
|
|
1200 |
150 |
1.2 |
| Wide Ultra3 SCSI |
|
|
1280 |
160 |
1.28 |
| Ultra160 SCSI |
|
|
1280 |
160 |
1.28 |
| Ultra Serial ATA 1500 |
|
|
1500 |
187.5 |
1.5 |
| Ultra320 SCSI |
|
|
2560 |
320 |
2.56 |
| FC-AL Fibre Channel |
|
|
3200 |
400 |
3.2 |
|
|
|
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