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Archives of the TeradataForum
Message Posted: Tue, 06 Dec 2005 @ 21:53:04 GMT
| Subj: | | Re: Coexistence and disk families |
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| From: | | Michael Larkins |
Anom wrote:
| | Personally, I would have serious reservations of mixing EMC disk with other types of disk within the same machine because you would have
some nodes with faster disks and other nodes with slower disks, and that would be very hard to balance. | |
I too tend to believe that pure is best and provides a more predictable performance level on Teradata.
However, for the sake of discussion based on the assumption that the co-existence is to increase the number of nodes on the system, therefore
more AMPs and each AMP would have less data. With less data on each AMP overall performance is enhanced on each AMP. Then, as long as the new
disk space equals the current disk space per AMP - would the system still not be faster than the current configuration and therefore satisfy a
SHORT-TERM (capitalized for emphasis) goal, especially if the fastest disks were on the node(s) with the least horsepower?
Looking forward to your expert comments.
Michael Larkins
Certified Teradata Master
Certified Teradata SQL Instructor
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