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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 Google’s 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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