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тАО02-11-2011 11:16 PM
тАО02-11-2011 11:16 PM
Open VMS system log requirement.
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тАО02-12-2011 09:01 AM
тАО02-12-2011 09:01 AM
Re: Open VMS system log requirement.
by default, you only have the accounting file, operator log and error log available on OpenVMS for after-the-fact system analysis. If you are running some performance analysis tools (e.g. T4 or PSDC), you may also be able to extract some data from those utilities.
Did just your application hang or the complete OpenVMS system ? Has the OpenVMS system been rebooted - check $ WRITE SYS$OUTPUT F$GETSYI("BOOTTIME") ? Maybe the system crashed ($ TYPE CLUE$HISTORY) ?
Volker.
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тАО02-12-2011 10:15 AM
тАО02-12-2011 10:15 AM
Re: Open VMS system log requirement.
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тАО02-12-2011 10:26 AM
тАО02-12-2011 10:26 AM
Re: Open VMS system log requirement.
so we are talking about a possible 'system hang'. The reason could be software or hardware. In a situation like this, one should first try to PING the system. If that works, you know that at the the IP drivers still work. If if fails, it may be a network problem or a hardware hang.
Next go the the console terminal and try to login. Do you get a Username: prompt ? If the system appears to hang, press the HALT button, then - if the console prompt appears - type >>> CRASH
If it's not a hardware hang, this will cause a system crash to be written and the system will automatically boot afterwards. You can analyze the system crash and try to find the reason for the hang.
If the system does not react on pressing the HALT button, it's a hardware hang and it may be very hard to analyze that.
Volker.
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тАО02-12-2011 05:22 PM
тАО02-12-2011 05:22 PM
Re: Open VMS system log requirement.
You'll need the Data Collector running on the host and the Analyzer running on at least one other VMS or Windows system. You may still have to crash the system, but you just might be able to: 1) see what's happening first, 2) avoid a crash with one of the available "fixes", and/or 3) get more information from the Analyzer log file about what was happening during that time.
The Data Collector runs at the device driver level, so information/access may be available even when the system is hung (just not crashed completely).
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тАО02-12-2011 06:47 PM
тАО02-12-2011 06:47 PM
Re: Open VMS system log requirement.
I was able to ping at the time of hang.But as the event has already occured on 11-Feb-2011 at around and after that the system is rebooted manually, can I analyze the root cause of the so called hang/crash.Actually I like to know what exactly happened during the period i.e. from 17:45hrs to 18:30 hrs on 11-Feb-2011.Is there any way?And does crash gives the details happened before manually reboot?
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тАО02-12-2011 06:50 PM
тАО02-12-2011 06:50 PM
Re: Open VMS system log requirement.
Can u please tell me how to see the system events happened by availability manager.I have that installed in my system.So How can I see the PAST Events (Events just before the reboot)?
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тАО02-12-2011 07:23 PM
тАО02-12-2011 07:23 PM
Re: Open VMS system log requirement.
Did you have the Analyzer running on a separate system that was monitoring the node in question?
If so, go to that system and you'll find log files in the program installation directory. Mine (on a Windows node) are in C:\Program Files\Hewlett-Packard\HP Availability Manger V3.0-1. Look for the log file(s) for the particular time frame, starting with AnalyzerEvents_Conn0_
If your analyzer node is OpenVMS, check the *AMDS* logicals for the location. I believe you'll find them in AMDS$AM_LOG or more specifically AMDS$AM_ROOT:[AMDS$AM]
The logs can be quite large and "noisy" depending on how much customization you've done with the thresholds and the activity of your system.
I hope this helps. I've used these logs many times for post-event analysis.
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тАО02-12-2011 07:39 PM
тАО02-12-2011 07:39 PM
Re: Open VMS system log requirement.
Check the following links for HP Availabity manager details -
http://h71000.www7.hp.com/openvms/products/availman/docs.html
For Documentation, refer
http://h71000.www7.hp.com/openvms/products/availman/6552pro.html
* Chapter 5 - Getting Information About Events
To understand your problem, you need to provide the details
1) Was it a process hang or system hang ?
2) How was the system rebooted ? Was it force crashed ?
Regards,
Murali
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тАО02-13-2011 12:14 AM
тАО02-13-2011 12:14 AM
Re: Open VMS system log requirement.
for after-the-fact analysis on OpenVMS, by default you only have OPERATOR.LOG, Accounting and errorlog and any application logfile. In case of a system hang, only a forced crash will help you, in case of an application hang, you might be able to do some online analysis, if you have the time and know what to look for. A forced crash is ALWAYS better than just a boot, as with a plain boot, you losse ALL the state information of the system (including errlog entries not yet written to the disk).
To do after-the-fact analysis with AMDS, you need to have it running continuously (on the client running the AMDS GUI) or at least start it, if the system/application hangs.
Volker.