On Fri, 19 Jan 2007, I wrote:
I am also seeing this from my Level 2 (NEXRAD2) feed:
Jan 20 05:26:45 weather3 notam.atmos.uiuc.edu[6135] WARN: Product from
"bdds-kshv.nexrad.noaa.gov_v_notam.atmos.uiuc.edu" was created too far in the
future: 12c539f8fae232ec8713bb7dbd22a9e7 17330 20070120052835.334 NEXRAD2
193040 L2-BZIP2/KSHV/20070120052324/193/40
Jan 20 05:26:45 weather3 notam.atmos.uiuc.edu[6135] WARN: This will degrade
performance when downstream LDM-s reconnect. Ensure that local and
origination clocks are accurate.
By the way, my normal LDM logs are around 1 MB in size per day. With the
two inaccurate LEVEL2 data feed clock sites, that has swelled to 10
mb/day. If a minor calamity were to occur where NTP servers freaked out,
this could cause problems for those with smaller disks/storage areas. I
absolutely and wholeheartedly recommend this go forward, but really, once
per minute---heck, even once per 5, 10 or maybe 15 minutes notification is
enough, as most log files aren't big anyway.
OR...
Thinking out of the box, can this be made into a separate log file,
or have options to emailed to the administrator, put on the console
screen?
Also, when do we get notified? If you're 3 seconds off, does anyone care?
If an NTP ping happens once a day, and the clock is fast/slow (as my
desktop is, loses 30 seconds per day for whatever reason), 5 seconds off
could produce a ton of messages that will quickly become the "cry wolf"
syndrome.
Again, let me stress, I am all for it, let's do this! But, I don't want a
machine slowing down or crashing if a serious problem occurs upstream from
me due to excessive log writing. What does everyone else think?
My $.76, adjusted for high gas prices.
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Gilbert Sebenste ********
(My opinions only!) ******
Staff Meteorologist, Northern Illinois University ****
E-mail: sebenste@xxxxxxxxxxxxxxxxxxxxx ***
web: http://weather.admin.niu.edu **
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