[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

[McIDAS #TUM-731007]: McIDAS - East and West ADDE Servers Stopped Providing Data

Hi Fred,

re:
> Thanks for fixing the problem.

No worries.

> For the moment, I am copying the GOES-west
> data from your experimental direct readout server.

Very good.  Please let us know if/when you run into any problems accessing
data off of goeswest.unidata.ucar.edu.

> When you make the system
> operational, could you give it a group name other than WEST, which is the
> same ADDE group name as the Wisconsin server.  I would like to setup my
> software to look at both your server and the Wisconsin server.  If one of
> the systems is down, it would automatically switch over to the good system.
> The easiest software logic would be to have them with separate group names
> so that the software could look at either without changing the DATALOC
> addresses.

The historical approach is to have datasets with the same content called
by the same ADDE group name and descriptors on all machines.  The logic
"pointing" at the backup server is very simple.  Here for example is a
portion of the script used to create Unidata-Wisconsin datastream images:

-- using the definitions:

PRIMARY_GROUP=WESTL
BACKUP_GROUP=WESTS
DESCRIPTOR=NH
PRIMARY=${PRIMARY_GROUP}/${DESCRIPTOR}
BACKUP=${BACKUP_GROUP}/${DESCRIPTOR}

A Korn shell script function first tries to copy from the primary server.
It switches to the backup if the copy fails:

do_imgcopy()
{
   mceval.k IMGCOPY $PRIMARY $DEST $KEYWORDS
   ret=$?
   if [[ $ret -ne 0 ]]; then
      mceval.k IMGCOPY $BACKUP $DEST $KEYWORDS
      ret=$?
   fi

}

The do_imgcopy() function is called as part of the processing pipeline:

...
do_imgcopy
if [[ $ret -eq 0 ]]; then
   inject_into_ldm
   do_archive
else
   do_error
fi

I can send you scripts that illustrate the technique that has been used
in Unidata-Wisconsin datastream image generation for over 7 years now.  Please
let me know if you are interested.

> Could you give me a heads up on when you plan on moving your
> antenna to GOES-South.

We have been given a tentative green light for pursuing the installation
of a GOES-South ingest system, but we are not being allowed to act until
the monies are made available.  As soon as we get the account key for
the funds, we will begin the process of purchasing needed hardware.
One of the first things that is needed is the equipment that will steer
the dish.  Please take a look at some information posted by SSEC Wednesday
Oct 4th. Two bits of information, one good, one not so good;

 - GOES-10 has finished meneuvering
 - SSEC staff are moving the dish(es) daily to track GOES-10

 <http://www.ssec.wisc.edu/data/g10/>

Cheers,

Tom
****************************************************************************
Unidata User Support                                    UCAR Unidata Program
(303) 497-8642                                                 P.O. Box 3000
address@hidden                                   Boulder, CO 80307
----------------------------------------------------------------------------
Unidata HomePage                       http://www.unidata.ucar.edu
****************************************************************************


Ticket Details
===================
Ticket ID: TUM-731007
Department: Support McIDAS
Priority: Urgent
Status: Closed