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sharonn 9 posts Joined 05/16
06 Jul 2016
Ping Failed - can not connect to Teradata on Linux - aws

Hi,
I’m using Teradata Express on linux machine - aws.
When starting the machine, Teradata is not starting properly.
I have to stop it and start it several times until Teradata works fine.
Today it did not start at all...
When I type this command:
pdestate –a
I get this state:
PDE state is RUN/STARTED.
DBS state is 7: System is operational without PEs - Sessions are not allowed
What can be the cause of this problem?
Thank you very much

dnoeth 4628 posts Joined 11/04
07 Jul 2016

Well, there's no Parsing Engine, no way to logon.
There were several crashes of the PE during the restarts, which finally lead to a FATAL state.
You can investigate what caused the crashes (/var/log/messages) and then try to set it ONLINE again using VProcManager.
 
But as it's an Express version it might be easier to dump it and start with a fresh one.

Dieter

sharonn 9 posts Joined 05/16
07 Jul 2016

Thank you Dieter,
I've tried looking at /var/log/messages but could not find any useful information - can you please guide me what to look for?
i've also tried restarting with tpareset –f and deleting /var/opt/teradata/tdtemp/PanicLoopDetected, but I still get the same state.
I would like to create a new TDE on AWS but it is no longer available – is there a way of creating it?
Can I somehow access and extract the data on the faulted machine?
Thank you very much for your help
Sharon

dnoeth 4628 posts Joined 11/04
07 Jul 2016

There should be messages when & why Teradata restarts, search for entires following "#TPA START".
 
To fix it you might start the Database Window (xdbw) and then "start vprocmanager":
"status" will show the down PE number, then "set nnnnn online" and finally "restart tpa bla" and keep your fingers crossed.

Dieter

sharonn 9 posts Joined 05/16
11 Jul 2016

Thank you Dieter,
I’ve decided creating a new TDE machine.
Since there is no longer TDE in AWS, I would like to create a linux machine in AWS and install the TDE VM on it.
Do you have any recommendations? Which OS is best? Which TDE version?
THANK YOU FOR YOUR HELP
Sharon

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