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[LDM #ADF-956714]: intermittent data feed (UNCLASSIFIED)



Paul,

> I receive stage river gage data via my division office. They are receiving
> a continuous data feed, but I am receiving only intermittently. Below
> is an example for the last five days.
> 
> This started happening about two months ago. Before that we had solid
> feeds.
> 
> Any suggestions on how to diagnose the issue and/or what might be
> the cause?

The first place to look would be in the LDM log files of both the upstream and 
downstream sites.

If a notifyme(1) command executed by the LDM user on the downstream site to the 
upstream site indicates that the downstream can receive data, then the LDM 
system on the downstream site should receive the data. It would then be 
unlikely that any problems with data reception are due to the LDM system.

Perhaps the bandwidth of the connection is insufficient. A large latency would 
indicate this. You could put the downstream LDM in "verbose" logging mode 
(ldmadmin start -v) and look at its log file to see what the latency is by 
comparing the creation-time of each product with the timestamp of the log 
message.

> Paul Cocca, P.E.
> Hydraulic Engineer
> U.S. Army Corps of Engineers, Buffalo District
> 1776 Niagara St.
> Buffalo, NY 14207-3199
> 716-879-4332
> 
> Ordinate         Date / Time          MtMorris Elev lrddomsat-raw
> --------------------------------------------------------
> Units                                 ft
> Type                                  INST-VAL
> 1             16 May 12, 12:00        590.64
> 2             16 May 12, 12:30        590.66
> 3             16 May 12, 13:00        590.66
> 4             16 May 12, 13:30        590.66
> 5             16 May 12, 14:00        590.65
> 6             16 May 12, 14:30        590.62
> 7             16 May 12, 15:00        590.61
> 8             16 May 12, 15:30
> 9             16 May 12, 16:00
> 10            16 May 12, 16:30        590.57
> 11            16 May 12, 17:00        590.56
> 12            16 May 12, 17:30        590.56
> 13            16 May 12, 18:00        590.55
> 14            16 May 12, 18:30        590.55
> 15            16 May 12, 19:00        590.55
> 16            16 May 12, 19:30        590.54
> 17            16 May 12, 20:00        590.54
> 18            16 May 12, 20:30        590.54
> 19            16 May 12, 21:00        590.54
> 20            16 May 12, 21:30        590.54
> 21            16 May 12, 22:00        590.54
> 22            16 May 12, 22:30        590.54
> 23            16 May 12, 23:00        590.54
> 24            16 May 12, 23:30        590.54
> 25            16 May 12, 24:00        590.54
> 26            17 May 12, 00:30        590.54
> 27            17 May 12, 01:00        590.54
> 28            17 May 12, 01:30        590.54
> 29            17 May 12, 02:00        590.54
> 30            17 May 12, 02:30        590.54
> 31            17 May 12, 03:00        590.54
> 32            17 May 12, 03:30        590.54
> 33            17 May 12, 04:00        590.54
> 34            17 May 12, 04:30        590.54
> 35            17 May 12, 05:00        590.54
> 36            17 May 12, 05:30        590.54
> 37            17 May 12, 06:00        590.54
> 38            17 May 12, 06:30        590.54
> 39            17 May 12, 07:00        590.54
> 40            17 May 12, 07:30        590.54
> 41            17 May 12, 08:00        590.54
> 42            17 May 12, 08:30        590.54
> 43            17 May 12, 09:00        590.54
> 44            17 May 12, 09:30        590.54
> 45            17 May 12, 10:00        590.54
> 46            17 May 12, 10:30        590.54
> 47            17 May 12, 11:00        590.54
> 48            17 May 12, 11:30        590.54
> 49            17 May 12, 12:00        590.54
> 50            17 May 12, 12:30
> 51            17 May 12, 13:00
> 52            17 May 12, 13:30
> 53            17 May 12, 14:00
> 54            17 May 12, 14:30
> 55            17 May 12, 15:00
> 56            17 May 12, 15:30
> 57            17 May 12, 16:00
> 58            17 May 12, 16:30        590.52
> 59            17 May 12, 17:00        590.52
> 60            17 May 12, 17:30        590.52
> 61            17 May 12, 18:00        590.52
> 62            17 May 12, 18:30        590.52
> 63            17 May 12, 19:00        590.51
> 64            17 May 12, 19:30        590.51
> 65            17 May 12, 20:00        590.51
> 66            17 May 12, 20:30        590.51
> 67            17 May 12, 21:00        590.51
> 68            17 May 12, 21:30        590.50
> 69            17 May 12, 22:00        590.50
> 70            17 May 12, 22:30
> 71            17 May 12, 23:00
> 72            17 May 12, 23:30
> 73            17 May 12, 24:00
> 74            18 May 12, 00:30
> 75            18 May 12, 01:00
> 76            18 May 12, 01:30
> 77            18 May 12, 02:00
> 78            18 May 12, 02:30
> 79            18 May 12, 03:00
> 80            18 May 12, 03:30
> 81            18 May 12, 04:00
> 82            18 May 12, 04:30
> 83            18 May 12, 05:00
> 84            18 May 12, 05:30        590.46
> 85            18 May 12, 06:00        590.46
> 86            18 May 12, 06:30        590.45
> 87            18 May 12, 07:00        590.45
> 88            18 May 12, 07:30        590.45
> 89            18 May 12, 08:00        590.45
> 90            18 May 12, 08:30        590.44
> 91            18 May 12, 09:00        590.43
> 92            18 May 12, 09:30        590.43
> 93            18 May 12, 10:00        590.43
> 94            18 May 12, 10:30        590.42
> 95            18 May 12, 11:00        590.42
> 96            18 May 12, 11:30        590.42
> 97            18 May 12, 12:00        590.41
> 98            18 May 12, 12:30        590.41
> 99            18 May 12, 13:00        590.41
> 100           18 May 12, 13:30
> 101           18 May 12, 14:00
> 102           18 May 12, 14:30
> 103           18 May 12, 15:00
> 104           18 May 12, 15:30
> 105           18 May 12, 16:00
> 106           18 May 12, 16:30
> 107           18 May 12, 17:00
> 108           18 May 12, 17:30
> 109           18 May 12, 18:00
> 110           18 May 12, 18:30        590.36
> 111           18 May 12, 19:00        590.35
> 112           18 May 12, 19:30        590.35
> 113           18 May 12, 20:00        590.35
> 114           18 May 12, 20:30        590.34
> 115           18 May 12, 21:00        590.33
> 116           18 May 12, 21:30        590.32
> 117           18 May 12, 22:00        590.32
> 118           18 May 12, 22:30        590.31
> 119           18 May 12, 23:00        590.31
> 120           18 May 12, 23:30
> 121           18 May 12, 24:00
> 122           19 May 12, 00:30
> 123           19 May 12, 01:00
> 124           19 May 12, 01:30
> 125           19 May 12, 02:00
> 126           19 May 12, 02:30        590.27
> 127           19 May 12, 03:00        590.26
> 128           19 May 12, 03:30        590.26
> 129           19 May 12, 04:00        590.26
> 130           19 May 12, 04:30        590.25
> 131           19 May 12, 05:00        590.25
> 132           19 May 12, 05:30        590.24
> 133           19 May 12, 06:00        590.23
> 134           19 May 12, 06:30        590.22
> 135           19 May 12, 07:00        590.22
> 136           19 May 12, 07:30        590.21
> 137           19 May 12, 08:00        590.21
> 138           19 May 12, 08:30        590.20
> 139           19 May 12, 09:00        590.20
> 140           19 May 12, 09:30        590.19
> 141           19 May 12, 10:00        590.19
> 142           19 May 12, 10:30        590.18
> 143           19 May 12, 11:00        590.18
> 144           19 May 12, 11:30        590.17
> 145           19 May 12, 12:00        590.17
> 146           19 May 12, 12:30        590.17
> 147           19 May 12, 13:00        590.16
> 148           19 May 12, 13:30        590.16
> 149           19 May 12, 14:00        590.15
> 150           19 May 12, 14:30        590.15
> 151           19 May 12, 15:00        590.15
> 152           19 May 12, 15:30        590.14
> 153           19 May 12, 16:00        590.14
> 154           19 May 12, 16:30        590.13
> 155           19 May 12, 17:00        590.13
> 156           19 May 12, 17:30        590.12
> 157           19 May 12, 18:00        590.11
> 158           19 May 12, 18:30        590.11
> 159           19 May 12, 19:00        590.11
> 160           19 May 12, 19:30        590.10
> 161           19 May 12, 20:00        590.10
> 162           19 May 12, 20:30        590.10
> 163           19 May 12, 21:00        590.09
> 164           19 May 12, 21:30
> 165           19 May 12, 22:00
> 166           19 May 12, 22:30
> 167           19 May 12, 23:00
> 168           19 May 12, 23:30
> 169           19 May 12, 24:00
> 170           20 May 12, 00:30
> 171           20 May 12, 01:00
> 172           20 May 12, 01:30
> 173           20 May 12, 02:00
> 174           20 May 12, 02:30        590.04
> 175           20 May 12, 03:00        590.04
> 176           20 May 12, 03:30        590.03
> 177           20 May 12, 04:00        590.02
> 178           20 May 12, 04:30        590.02
> 179           20 May 12, 05:00        590.01
> 180           20 May 12, 05:30        590.01
> 181           20 May 12, 06:00        590.01
> 182           20 May 12, 06:30        590.00
> 183           20 May 12, 07:00        590.00
> 184           20 May 12, 07:30        589.99
> 185           20 May 12, 08:00        589.99
> 186           20 May 12, 08:30        589.98
> 187           20 May 12, 09:00        589.98
> 188           20 May 12, 09:30        589.98
> 189           20 May 12, 10:00        589.97
> 190           20 May 12, 10:30        589.97
> 191           20 May 12, 11:00        589.97
> 192           20 May 12, 11:30        589.97
> 193           20 May 12, 12:00        589.96
> 194           20 May 12, 12:30        589.96
> 195           20 May 12, 13:00        589.96
> 196           20 May 12, 13:30        589.96
> 197           20 May 12, 14:00        589.96
> 198           20 May 12, 14:30        589.95
> 199           20 May 12, 15:00        589.95
> 200           20 May 12, 15:30        589.95
> 201           20 May 12, 16:00        589.95
> 202           20 May 12, 16:30        589.94
> 203           20 May 12, 17:00        589.94
> 204           20 May 12, 17:30        589.94
> 205           20 May 12, 18:00        589.93
> 206           20 May 12, 18:30        589.93
> 207           20 May 12, 19:00        589.92
> 208           20 May 12, 19:30        589.92
> 209           20 May 12, 20:00        589.91
> 210           20 May 12, 20:30        589.91
> 211           20 May 12, 21:00        589.91
> 212           20 May 12, 21:30        589.90
> 213           20 May 12, 22:00        589.90
> 214           20 May 12, 22:30        589.89
> 215           20 May 12, 23:00        589.89
> 216           20 May 12, 23:30
> 217           20 May 12, 24:00
> 218           21 May 12, 00:30        589.87
> 219           21 May 12, 01:00        589.87
> 220           21 May 12, 01:30        589.87
> 221           21 May 12, 02:00        589.86
> 222           21 May 12, 02:30        589.86
> 223           21 May 12, 03:00        589.86
> 224           21 May 12, 03:30        589.86
> 225           21 May 12, 04:00        589.86
> 226           21 May 12, 04:30        589.86
> 227           21 May 12, 05:00        589.86
> 228           21 May 12, 05:30        589.85
> 229           21 May 12, 06:00        589.85
> 230           21 May 12, 06:30        589.85
> 231           21 May 12, 07:00        589.85
> 232           21 May 12, 07:30        589.85
> 233           21 May 12, 08:00        589.84
> 234           21 May 12, 08:30        589.84
> 235           21 May 12, 09:00        589.84
> 236           21 May 12, 09:30        589.84
> 237           21 May 12, 10:00        589.84
> 238           21 May 12, 10:30        589.84
> 239           21 May 12, 11:00        589.84
> 240           21 May 12, 11:30
> 241           21 May 12, 12:00
> 242           21 May 12, 12:30
> 243           21 May 12, 13:00
> 
> 
> Classification: UNCLASSIFIED
> Caveats: NONE
> 
> 
> 

Regards,
Steve Emmerson

Ticket Details
===================
Ticket ID: ADF-956714
Department: Support LDM
Priority: Normal
Status: Closed


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