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Re: UNIDATA LDM feed types (fwd)

Hi Todd,

I'm unavailable to provide support through the end of this week as I am
teaching a workshop that starts tomorrow.  Can you get by with your
975Mb queue until next week?  Depending on what you are requesting that
could well be sufficient - the hourly maximum for our most popular
feedtypes was recently calculated to be just under 500Mb.   (The average
was under 200Mb.)  If you build your 975Mb queue, let the LDM run for a
while, then use 'pqmon' you can see how old the oldest product is in
your queue, which will let you know if you're holding more or less than
an hour's worth of data.

If you need support sooner let me know and I'll try to find someone else
to help you.

Btw, we recommend *not* running pqexpire for LDM version 5.1.2 or
greater.  FYI.

Anne
-- 
***************************************************
Anne Wilson                     UCAR Unidata Program            
address@hidden                 P.O. Box 3000
                                  Boulder, CO  80307
----------------------------------------------------
Unidata WWW server       http://www.unidata.ucar.edu/
****************************************************

Jeff Weber wrote:
> 
> Hi Anne,
> 
> Maybe you can steer Todd in the right direction.
> 
> still in workshop............
> 
> -Jeff
> ____________________________                  _____________________
> Jeff Weber                                    address@hidden
> Unidata Support                               PH:303-497-8676
> NWS-COMET Case Study Library                  FX:303-497-8690
> University Corp for Atmospheric Research      3300 Mitchell Ln
> http://www.unidata.ucar.edu/staff/jweber      Boulder,Co 80307-3000
> ________________________________________      ______________________
> 
> ---------- Forwarded message ----------
> Date: Wed, 1 Aug 2001 08:38:43 -0400
> From: Todd McInerney <address@hidden>
> To: Jeff Weber <address@hidden>
> Cc: Ronald Weglarz <address@hidden>
> Subject: Re: UNIDATA LDM feed types
> 
> Hello, Jeff.
> 
> We are having a slight issue building a 2 GB LDM queue.  In the error message
> below it refers to mmap.  I have verified that it is not a disk or a quota 
> issue
> on the /u01 disk partition (I was able to create a text file approximately 4 
> GB
> there).  The largest queue size I can build is approximately 975 MB.
> 
> The physical memory on the system is 128 MB with 386 MB of SWAP over two
> partitions.
> 
> Any help would be greatly appreciated.
> 
> Cheers,
> Todd
> 
> % pqcreate -v -s 2048M -q /u01/ldm/data/ldm.pq
> 
> Creating /u01/ldm/data/ldm.pq, 2147483648 bytes, 524288 products.
> Jul 31 19:14:11 pqcreate[27523]: mmap: 0 0 2202886144: Not enough space
> pqcreate: create "/u01/ldm/data/ldm.pq" failed: Not enough space
> 
> Jeff Weber <address@hidden> on 07/30/2001 11:41:04 AM
> 
> 
> 
>  To:      Ronald Weglarz/Phy/WCSU@WCSU
> 
>  cc:      address@hidden, ldm-support
>           <address@hidden>, Todd
>           McInerney/WCSU@WCSU
> 
> 
> 
>  Subject: Re: UNIDATA LDM feed types
> 
> 
> Hi Ron,
> 
> It will be placed in your queue.
> 
> The queue will flush itself so you do not need to worry about your hard
> drive being filled, but you will want to monitor your queue to see if it
> is the appropriate size for the data you are requesting, generally 2 GB is
> sufficient for an hours worth of data. Depending upon your pqact entries,
> it may then try to file products to where you have designated..this may
> cause your hard drive to fill.
> 
> Please see:
> 
> http://unidata.ucar.edu/cgi-bin/man-cgi?pqcreate+1
> 
> http://unidata.ucar.edu/cgi-bin/man-cgi?pqutil+1
> 
> http://unidata.ucar.edu/cgi-bin/man-cgi?pqexpire+1
> 
> for queue isssues, and :
> 
> http://unidata.ucar.edu/cgi-bin/man-cgi?pqact+1
> 
> for pqact functions...
> 
> I will be in workshops this week, but will be monitoring my e-mail.
> 
> Please let me know if more questions arise.,.
> 
> Thank you,
> 
> -Jeff
> ____________________________                  _____________________
> Jeff Weber                                    address@hidden
> Unidata Support                               PH:303-497-8676
> NWS-COMET Case Study Library                  FX:303-497-8690
> University Corp for Atmospheric Research      3300 Mitchell Ln
> http://www.unidata.ucar.edu/staff/jweber      Boulder,Co 80307-3000
> ________________________________________      ______________________
> 
> On Mon, 30 Jul 2001, Ronald Weglarz wrote:
> 
> >
> >
> > Hi, Jeff:
> >
> >      Can you please tell me whether or not once the data feed starts, is it
> > automatically downloaded to my workstation's harddrive?   We currently are
> > limited to a 3-5 yr old 433MHz DEC Alpha workstation that is running TRu64
> > (COMPAQ's version of UNIX), with ~128 Mb RAM, and less than 4.5 GB total
> > "usable" work space.  These limitations will limit our capability for the
> > moment, but I would like to start receiving as much sfc, upper air, 
> > satellite,
> > and radar data as possible.
> >
> > Please advise!
> > Thanks for all your time and help.
> > Warmest regards, Ron
> >
> > PS   University Computing here at WCSU is looking into the possibility of
> > getting me either an 8mm exabyte tape drive or a CD read/write unit --- if
> this
> > comes through in the near future, then once the data streams start coming 
> > in,
> > archiving from my workstation hard drive to tape or CD ROM should not be an
> > issue, but currently we are limited in are archiving capabilities until the
> tape
> > drive or CD burner can be
> > delivered to the MS&WC.
> >
> +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
> 
> > Dr. Ron Weglarz, Asst. Prof. PAM
> > Director, WCSU MS&WC
> > Room 219 A (Office)/221 (MS&WC), Higgins Hall, Midtown Campus
> > Dept. PAM, SA&S, WCSU
> > 181 White Street
> > Danbury, CT 06810
> > Tel: (203) 837-8670 (Office)/(203) 837-8552 (MS&WC)/(203) 837-8595 
> > (FAX)/(203)
> > 837-8669 (PAM)
> > Email: address@hidden
> >
> > MS&WC = Meteorological Studies and Weather Center
> > PAM = Physics, Astronomy, and Meteorology
> > SA&S = School of Arts and Sciences
> > WCSU = Western Connecticut State University
> >
> >
> >