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[LDM #QJQ-182312]: LDM Data Issues



Hey Gilbert,

> I investigated the issue further and I think I found the problem. All of our 
> AllisonHouse servers used Googleâs internal stratum 2 NTP server, while our 
> satellite ingester used a pool of publicly available stratum three servers.
> 
> The variation of the quality of the server pool with the stratum 3 servers 
> caused the clock to be off by a few seconds at times. While that is not an 
> issue for most folks, it is, obviously, for the LDM.

Wow! I wouldn't have thought the could be off by that much. Are you using 
ntpd(8) or ntpdate(1) to adjust the time?

> I switched our NOAAport satellite ingester to stream from the stratum 2 
> public servers at Google. Since then, the problem has disappeared. I will 
> reopen this ticket if need be, but for now, consider this issue closed and 
> solved.

Good catch.

Regards,
Steve Emmerson

Ticket Details
===================
Ticket ID: QJQ-182312
Department: Support LDM
Priority: Normal
Status: Closed
===================
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NOTE: All email exchanges with Unidata User Support are recorded in the Unidata inquiry tracking system and then made publicly available through the web. If you do not want to have your interactions made available in this way, you must let us know in each email you send to us.