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Conference spezko::cluster

Title:+ OpenVMS Clusters - The best clusters in the world! +
Notice:This conference is COMPANY CONFIDENTIAL. See #1.3
Moderator:PROXY::MOORE
Created:Fri Aug 26 1988
Last Modified:Fri Jun 06 1997
Last Successful Update:Fri Jun 06 1997
Number of topics:5320
Total number of notes:23384

5135.0. "How to force SYSAP to change port (load sharing)" by COL01::VSEMUSCHIN (Seva@COO, the Recycled Employee) Tue Oct 15 1996 13:20

T.RTitleUserPersonal
Name
DateLines
5135.1WAGBSS::JILSONWFH in the Chemung River ValleyTue Oct 15 1996 13:591
5135.2ROFLCOL01::VSEMUSCHINSeva@COO, the Recycled EmployeeTue Oct 15 1996 14:128
5135.3looks like, that it is solvedCOL01::VSEMUSCHINSeva@COO, the Recycled EmployeeTue Oct 15 1996 15:1714
5135.4what is, when system disks are local ?COL01::VSEMUSCHINDuck and Recover !Thu Nov 21 1996 04:4510
5135.5something new about it ?COL01::VSEMUSCHINDuck and Recover !Fri Jan 10 1997 10:1517
5135.6SCS load balancing is Coming!EVMS::PERCIVALOpenVMS Cluster EngineeringFri Jan 17 1997 09:239
5135.7what I need NOW is simpe hardware workaroundCOL01::VSEMUSCHINDuck and Recover !Mon Jan 20 1997 03:4530
5135.8Any Data To Base These Questions On?XDELTA::HOFFMANSteve, OpenVMS EngineeringMon Jan 20 1997 09:457
5135.9Some dataVIVIAN::RANCEhttp://vivian.hhl.dec.com/rance/Mon Jan 20 1997 16:2527
5135.10Looking for dual-DSSI info...XDELTA::HOFFMANSteve, OpenVMS EngineeringMon Jan 20 1997 17:1814
5135.11any data to base these questions onCOL01::VSEMUSCHINDuck and Recover !Tue Jan 21 1997 05:1751
5135.12Some explanationsVMSSPT::JENKINSKevin M Jenkins VMS Support EngineeringTue Jan 21 1997 07:4137
5135.13one of question was little different from those you answeredCOL01::VSEMUSCHINDuck and Recover !Tue Jan 21 1997 08:3025
5135.14I don't have many test configsVMSSPT::JENKINSKevin M Jenkins VMS Support EngineeringWed Jan 22 1997 08:0713
5135.15OKCOL01::VSEMUSCHINDuck and Recover !Wed Jan 22 1997 09:555
5135.16some experiences with port_class_setup_axp.exeCOL01::VSEMUSCHINDuck and Recover !Mon Apr 07 1997 08:2946
I tried port_class_setup in the following configuration:

    ALF1            KFESA - PAA0: <---> PAA0: - KFESA ALF2
    AS1000A 5/300   KFPSA - PIA0: <---> PIA0: - KFPSA AS1000A 5/300
    256 MB          KFPSA - PIB0: <---> PIB0: - KFPSA 256 MB
    OVMS 6.2-1H3    DEFPA - PEA0: <===> PEA0: - DEFPA OVMS 6.2-1H3

PAA0: is free (only cable among two computers). PIA and PIB each
has an HSD50 attached.

After boot anything was OK, until PIA0: closed the virtual circuit.
Then VMS$VAXcluster changed to PAA0:. We (customer and I) tried to
use PORT_CLASS_SETUP to change the load class on PI adapters to 0x1A.
First PIA0 then PIAB0. After that all SYSAP's are were concentrated
on PIA0:. PIB0: as well as PAA0: was idle. Degrading the load class
of PIA0: 0x19 (both computers) didn't help. Raising the PIB's load
class to 0x1B (on ALF2) forced VMS$VAXcluster to PAA0: (whose load
class was never changed - 0x14) and all others SYSAP's but MSCP$DISK
to PAB0:. After raisin the load class of PIA0: from 0x19 to 0x1B
VMS$VAXcluster joined MSCP$DISK on PIA0:. After that I rose the load
class of PIA0: on ALF1 to 0x1A without any effect to SYSAP's ...

I think the reason why SYSAP's were concentrated on PIA0 was lack of
dynamic load balancing on Alpha's. But I thought, that at least some
disk or tape SYSAP's could be left on PIB0 because it has some disks
attached (HSD50). Why not ?

Why I lowered the load class on PIA0: without any effect on SYSAP's ?
Was it the feature of PORT_CLASS_SETUP or side effect of load balancing
(or better to say lack of it) on Alpha's ?

Third question is why when I rose load class on PIA0: VMS$VAXcluster
gone to PAA0: ?                                      

And why MSCP$DISK was left on PAA0: ? It was exactly what I want to 
achieve - some SYSAP's on PIA other on PIB, but why one time after the
raising of load class ALL SYSAP's are concentrated on interface with 
the highest class (it was PIA0) and at the other time only SOME of them
changed to the PIB0 (owner of the highest class) ?

TIA

=Seva