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Entry  Tue Apr 17 11:05:04 2012, Jamie, Update, CDS, CDS upgrade in progress 
    Reply  Tue Apr 17 19:03:09 2012, Jamie, Update, CDS, CDS upgrade in progress 
       Reply  Wed Apr 18 19:59:48 2012, Jamie, Update, CDS, CDS upgrade success 
          Reply  Fri Apr 20 19:54:57 2012, Jamie, Update, CDS, CDS upgrade problems 
             Reply  Sat Apr 21 17:38:19 2012, Jamie, Update, CDS, dtt, dataviewer working; problem with trend frames 
                Reply  Sat Apr 21 21:10:34 2012, Jamie, Update, CDS, trend frame issue partially resolved 
                   Reply  Tue Apr 24 14:35:37 2012, Jamie, Update, CDS, limited second trend lookback 
             Reply  Sat Apr 21 20:40:28 2012, Jamie, Update, CDS, framebuilder frame writing working again 
          Reply  Tue Apr 24 14:55:00 2012, Jamie, Update, CDS, cds code paths (rtscore, userapps) have moved 
Message ID: 6561     Entry time: Tue Apr 24 14:35:37 2012     In reply to: 6556
Author: Jamie 
Type: Update 
Category: CDS 
Subject: limited second trend lookback 


Alex told me that the "trend data is not available" message comes from the "trender" functionality not being enabled in daqd.  After re-enabling it (see #6555) minute trend data was available again.  However, there still seems to be an issue with second trends.  When I try to retrieve second trend data from dataviewer for which minute trend data *is* available I get the following error message:

Connecting to NDS Server fb (TCP port 8088)
Connecting.... done
No data found

read(); errno=9
read(); errno=9
T0=12-04-04-02-14-29; Length=3600 (s)
No data output.

Awaiting more help from Alex...

It looks like this is actually just a limit of how long we're saving the second trends, which is just not that long.  I'll look into extending the second trend look-back.

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