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RAID 0 is ganging nonconsecutive sectors (e.g. off different platters)
together to weave a stream of faster data. Thinking logically, once it gets
going, it is capable of streaming data much faster than a single spindle.
The hitch is "once it gets going". The latency to start will be slower.
For trading applications (lots of head seeks and small reads/writes), you
would be better off with separate drives. For something like video
capturing multi-GB data sets, then RAID is great.
-----Original Message-----
From: Simon Campbell [mailto:simtrader@xxxxxxxxxx]
Sent: Tuesday, March 05, 2002 1:56 PM
To: omega-list@xxxxxxxxxx
Subject: RAID 0 striping = faster TS peformance?
I asked the list about RAID a while back, but I missed the consensus on
whether RAID 0 (Striping) actually translates into faster performance on a
machine collecting real-time data and displaying lots of open workspaces
with real-times studies, using TS4. The following comment from a web site
leaves a question mark in my mind:
"I'd like to draw some conclusions regarding RAID itself. RAID 0 is an
excellent way to improve transfer rates and read and write speed. However,
RAID 0 cannot lower seek and access times, which is something to consider
before going the RAID 0 route. For heavy use of standard office
applications or gaming, the best buy is a single drive with faster access.
For other apps such as CAD or video editing, etc., then RAID 0 may be just
the thing."
What does this mean to the trader I ask myself?! Can someone tell me
definitively, either:
a) Yes, RAID 0 (striping) makes for much faster TS4 performance (and I
recommend using X number of hard drives) ....or,
b) No, it hardly makes any difference - stick to a single hard drive
Many thanks in advance,
Simon
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