Hi Hsie,
After doing some troubleshooting on stratus yesterday, I verified your
conjecture that the script used to scour the GRIB data on disk
and in the MySQL database was not working correctly on stratus.
"For the files" what was going on was:
- the scouring script, xcdscour, tries to go back 9 days and scour all
files from 9 days until the number of days that it is told to keep
(the number of days value passed on the invocation command line)
- what is supposed to happen is that the Julian date is calculated for
nine days, eight days, ... ago using the following subroutine:
days_ago_year() {
uname_s=`uname -s`
if [ "$uname_s" = "Linux" ]; then
daysago=`date -d "$1 days ago" +%Y%j`
else
hours=$(($1*24))
daysago=`TZ=GMT+$hours date +%Y%j`
fi
echo $daysago
}
This code works correctly on Linux systems. It seems that it does NOT work
correctly
on SunOS systems.
- I discovered that the "daysago=`TZ=GMT+$hours date +%Y%j`" calculation on
SunOS will
only work correctly for up to six days in the past. For the 7th, 8th, and
9th days
it returns the current Julian date instead of one for 7, 8, and 9 days ago,
respectively.
The result of this is that GRIB files that are to be kept are deleted from
disk.
The code used to scour the data from the MySQL database, however, works
correctly.
This accounts for your comment that just after running 'xcdscour' almost all
of the
GRIB messages were removed from /home/mcidas/savedata/grib while none of the
fields
were deleted from the MySQL database (as seen from a 'gribadmin num' listing).
I will be submitting a bug report to SSEC (xcdscour is their script, not mine)
to get this
fixed. In the meantime, I modified 'xcdscour' on stratus to only go back 6
days in time.
My fix seems to have worked correctly since stratus now appears to have a full
set of
data for GRIB messages received since I made the change.
I just thought you would want to know what was happening on stratus...
Cheers,
Tom
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Ticket Details
===================
Ticket ID: HZP-657281
Department: Support McIDAS
Priority: Normal
Status: Closed
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