Re: Time Region setting

[Yunyao Qu <Yunyao.Qu@xxxxxxxx>]

Hi, Ansley and All,
I Held this question for several days. We refresh it.
(1) For your previous  question(below): "avgard" is a variable in a NetCDF file
described in Descriptor file: SAA_Descriptor.

(2) My new question:
Is there any  performance difference if we switch the ORDER between "USE
DescriptorFile" and "SET MEMORY/SIZE=n"  statements in a GO Script file.
What I am concerned is that if I execute "SET MEMORY/SIZE=n", it will show "cached
data cleaned....". If the "USE DescriptorFile" already loaded some data in memory, I
do not want lose this job by resetting the memory. Otherwise I need run SET MEMORY
before USE DescriptorFile?

My GO file like this:
<<<<<<<
 USE SAA_Descriptor
 SET MEMORY/SIZE=6
SET REGION/Y=25S:61N/X=30E:11W/T="01-APR-2001:00:00":"31-MAY-2001:23:59"
LIST/FORMAT=tab/FILE="/saasp5_prod/my_avgrad_SST100.SPREA" avgrad
>>>>>>>

Thanks,
Frank

Ansley Manke wrote:

> Hi Frank,
> I need more information to know what might be happening.
>
> What is the output of the commands "SHOW DATA",
> "SHOW GRID avgrad"  Is avgrad a variable in your file?  Or is
> it computed from data in the file?
>
> If the command demands a large ammount of memory, you can use
> SET MEMORY/SIZE=(number in megabytes)  to increase the ammount
> of memory cache that is available to Ferret when it executes the command.
>
> Ansley
>
> Yunyao Qu wrote:
>
> > Hi, Ansley,
> > The following error message complains the T setting actually. If I
> > shrink the T range, it will work. What is the reason? How can we resolve
> > it?
> > Thanks,
> > Yunyao "Frank" Qu
> >
> > ========================
> > CANCEL MODE IGNORE_ERROR
> > USE SAA_Descriptor
> > SET WINDOW/SIZE=0.5
> >
> > SET REGION/Y=25S:61N/X=30E:11W/T="01-APR-2001:00:00":"31-MAY-2001:23:59"
> >
> > LIST/FORMAT=tab/FILE="/saasp5_prod/my_avgrad_SST100.SPREA" avgrad
> >  *** NOTE: Use SET and SHOW REGION to ensure that the region is
> > explicit;
> >  *** NOTE: then reissue your command.
> >  *** NOTE: The "Memory use" section of the FERRET Users Guide has
> > further tips.
> > yes? yes?
>
> --
> Ansley Manke  Pacific Marine Environmental Laboratory  Seattle WA  (206)526-6246

--
Yunyao "Frank" Qu
Satellite Active Archive (SAA)
NESDIS, NOAA