Re: performance

[Brent A McDaniel <gte328r@xxxxxxxxxxxxxxxxxxxxx>]

Oops.  Well, it is Sunday so hopefully I can be forgiven for some truly
terrible math.  If linear interpolation works it's going to take ~70-80
days to finish this up, not 10 days.  Obviously, I need to find a better
way.  Sorry for the confusion.

Brent




 > 
> 
> Ferret Users,
> 
> I'm wondering if there's a way to increase performance on the current
> calculation that I'm doing.  I opened up the ncep daily data files from
> 1957-1999 and am calculating the climatology for them.  Here's my
> procedure for that:
> 
> yes? set memory/size=100
>  Cached data cleared from memory
> yes? set data "/usr/local/ferret/extra/air.des"
> yes? DEFINE
> AXIS/T=0:365.2425/EDGES/NPOINTS=365/T0=1-JAN-0001/UNITS=DAYS/MODULO tdaily
> yes? let dailyclim=air[GT=tdaily@mod]
> yes? REPEAT/l=1:365 save/file="/data/ncep/dailyclim.nc"/append dailyclim
> 
> I started this friday afternoon and currently at noon on sunday it's
> working on it's 9th day (l=9).  If linear interpolation works for how long
> it'll take, I'm looking at ~10 days to finish the year.  This seems like
> an awfully long time as I've run averaging calculations (not using
> ferret) on the same data with the same machine that took around 6 hours if
> memory serves correctly.
> If this helps, p3 800mhz running linux with 512megs of ram.  Basically
> ferret and X are the only things currently running on the machine.
> 
> Thanks in advance,
> 
> Brent
> 
> 
> 

-- 
Brent A. McDaniel

Dept of Earth and Atmospheric Sciences
Georgia Institute of Technology
Atlanta, Ga.  USA