All,
I am running a trial version of S-PLUS 6 on Red Hat Linux release 7.0
(Guinness)
Kernel 2.2.16-35lfssmp on a 2-processor i686. The processors are
Pentium III 933 MHz/ 512 RAM with 2 per node, 16 nodes in all (i.e. 32
processors). It's a big, tall, black machine with lots of flashing
green lights that we nicknamed 'HAL', but its system name is Thor to
match our workstation nameing convention. But, I digress. Suffice to
say, its a powerful and fast machine. All tests of our other software
packages indicate much faster performance.
We recieved a demo version of S-PLUS 6 for Linux from Insightful because
their HP version would not work on our UNIX workstations. The S-PLUS
GUI and command lines seem to work on the Linux system, but are
*excrutiatingly* slow. I am starting a project in which I will be
working with 7 years of data collected every 5 minutes at 52 locations
and at several heights at each location. In other words, the data files
are huge.
As a test, I imported one 5 MB file into a data frame consisting of 15
columns and 62,900 rows. It took over 2 minutes to import, and when I
tried to look at it through the new data viewer S-Plus locked up and I
had to end the program through the Task Manager. It typed the data
frame name on the command line to view it that way, and it took over 3
minutes to output it. I can do calculations and other manipulations to
the data frame, but they take a long time.
I cross-checked this with MS Excel and S-PLUS 2000 on my PC (400 MHz,
Windows 2000, 384 RAM - less powerful than even 1 processor on our Linux
system). It took less than a minute to import the file into an Excel
spreadsheet, and even less time to import it into an S-PLUS dataframe.
The data were displayed *very* quickly when I typed the name of the
dataframe at the command line, and manipulation of the data in both
packages was quicker than on the Linux system.
I checked the object.size on the Linux version and it is set to Inf.
Are there any other memory things I should check? Has anyone else
experienced this on Linux? ANY advice is appreciated. The Linux
version *should* be running circles around the PC version given all the
computing power available to it.
Win
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Winifred C. Lambert Senior Scientist/Meteorologist
ENSCO, Inc.
Aerospace Sciences and Engineering Division
1980 N Atlantic Ave, Suite 230
Cocoa Beach, FL 32931
VOICE: 321.853.8130 FAX: 321.853.8415
lambert.winifred@ensco.com
AMU Quarterly Reports are available online:
http://science.ksc.nasa.gov/amu/home.html
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