Rich Smrcina wrote:
Interesting. That sort of smacks in the face of all reasonableness.
I really like this para:
"Here we have a clear-cut winner. The LVM ran 30% faster, achieved a 25%
higher transaction per second rate, scored 56% faster on kilobytes per
second and had a 108% better average response time. I suspect that the
real differentiator here was the temporary segment allocation necessary
for the large GROUP BY and ORDER BY operations."
108% better response time.
Thanks!
Richard Gasiorowski wrote:
Rich
Here is a site with some great information. Granted not done on system z
but if it were I would suspect the same performance ratio differences.
_I_ am doubtful for these reasons
1. An application that performs well on one variety of hardware won't
necessarily perform well on something entirely different.
2. The test was run on a system with plenteous CPU power, but relatively
poor I/O. I suspect that most zSeries users can through vastly superior
I/O capability at the task.
3. We don't know the limiting factors in the test; was the CPU maxed
out? I/O? Was it memory-constrained?
http://www.linuxjournal.com/article/8539
--
Cheers
John
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