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Re: [nv-l] ntl_reader

To: nv-l@lists.tivoli.com
Subject: Re: [nv-l] ntl_reader
From: James Shanks <jshanks@us.ibm.com>
Date: Wed, 4 Dec 2002 09:57:55 -0500
Leslie's right (of course). ntl_reader is the process started by the nettl 
-start command.

Many of the older NetView daemons implement nettl logging and tracing, 
which was developed by HP.  Essentially they log important messages (info, 
error, warning, critical) to a shared memory segment.  This avoids having 
a serialization problem or delays with many processes trying to write the 
same physical file.  The reader process reads that shared segment and 
pulls the records from it for inclusion in a log, so that the segment does 
not grow in size.
The logs themselves wrap.  First NetView writes to nettl.LOG00, then 
LOG01, then back to LOG00 again.  What's included in the log depends on 
how nettl was started.   nettl can also provide a trace function that 
works in the same way. You can start, stop, and change the options for 
nettl using serversetup Diagnose --> Set subsystem tracing and logging 
options (nettl). 

The records that are written to the nettl log and trace files are in 
binary, just as they are in the shared memory segment, so you have to 
format them using the netfmt command.  The easiest way to do that is just 
"netfmt -f /usr/OV/log/nettl.LOGxx  > my_formatted_nettl.LOGxx"   where xx 
is either 00 or 01, but you can also specify very precise subsets to 
whittle down the output. 

See the man pages on nettl and netfmt for more details.  See also the 
Diagnosis Guide for usage examples.  Some of the nettl output is quite 
useful for problem determination, but much of it may not be any help to 
you without knowledge of the internal code.

James Shanks
Level 3 Support  for Tivoli NetView for UNIX and NT
Tivoli Software / IBM Software Group




Leslie Clark/Southfield/IBM@IBMUS
12/04/2002 09:19 AM

 
        To:     nv-l@lists.tivoli.com
        cc: 
        Subject:        Re: [nv-l] ntl_reader







It is involved in the generation of the nettl.LOGxx files.

Cordially,

Leslie A. Clark
IBM Global Services - Systems Mgmt & Networking
Detroit


  
                      Robin James   
                      <robin.james@thal        To:       NetView 
Discussion <nv-l@lists.tivoli.com> 
                      esatm.com>               cc:   
                                               Subject:  [nv-l] ntl_reader 
 
                      12/04/2002 04:26   
                      AM  
  
  



Anyone know what the process called ntl_reader does because I can't find
it in the documentation?

We're using Netview 6.0.3 on Compaq TRU 64 UNIX.

--
Robin
email: robin.james@thalesatm.com
tel:   +44 (0) 1633-862020
fax:   +44 (0) 1633-868313

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