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тАО03-10-2006 05:41 AM
тАО03-10-2006 05:41 AM
I was going to try to use the LAVC$Stop_Bus on the FDDI device but am hesitating for the warning about a cluster crash. Several years ago we did use the code on a different host without any problems. Anyone know of a reason that I should not use that utility?
It is in Sys$examples.
Another question (bigger question) is why is it using the FDDI? The GigE should be much faster . From the HP Insights Web Interface the FDDI is Half duplex which does not seem correct but the ring was added without shutting down the cluster. That may be another problem.
Thanks for any insights...
Solved! Go to Solution.
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тАО03-10-2006 05:54 AM
тАО03-10-2006 05:54 AM
Solutionnowadays, you would want to use MC SCACP STOP LAN_DEVICE FWA instead of LAVC$STOP_BUS. Just make sure, you don't stop the only remaining cluster interconnect.
You can also lower the priority of SCS communications via FDDI (SCACP> SET LAN/PRIO=n FWA).
Use SCACP> SHOW CHAN to find out the load classes, packets transmitted etc. via the various channels. SCACP (and SDA> PE ...) offer lots of information about cluster communications...
Volker.
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тАО03-10-2006 06:10 AM
тАО03-10-2006 06:10 AM
Re: Added FDDI link as backup
The load class shows the FDDI as 100 and the GigE as 1000. Why should it use Fddi if GigE is available?
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тАО03-10-2006 06:16 AM
тАО03-10-2006 06:16 AM
Re: Added FDDI link as backup
try using priority -2 for FDDI. Maybe FDDI is preferred due to a larger buffer size ?
Could you provide your SCACP> SHOW CHAN output in an attached .TXT file ?
Volker.
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тАО03-10-2006 06:49 AM
тАО03-10-2006 06:49 AM
Re: Added FDDI link as backup
Can't post what I am seeing without typing it in. But the GigE device does appear to be getting more of the traffic now.
I have started a job that I noticed had a very extended runs after the FDDI addition. It went from 30 minutes to 2 hours. If it is back to normal I will consider success.
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тАО03-10-2006 07:13 AM
тАО03-10-2006 07:13 AM
Re: Added FDDI link as backup
Volker,
Many thanks for the very timely response.
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тАО03-10-2006 03:34 PM
тАО03-10-2006 03:34 PM
Re: Added FDDI link as backup
don't forget to add the SCACP command into the system startup. This is not a permanent change of the LAN_DEVICE priority and needs to be re-done after booting.
Volker.
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тАО03-13-2006 12:37 AM
тАО03-13-2006 12:37 AM