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Conference ulysse::rdb_vms_competition

Title:DEC Rdb against the World
Moderator:HERON::GODFRIND
Created:Fri Jun 12 1987
Last Modified:Thu Feb 23 1995
Last Successful Update:Fri Jun 06 1997
Number of topics:1348
Total number of notes:5438

665.0. "ORACLE: Cluster Failover with DLM ?" by NBOSWS::KASBERGER () Tue Jun 12 1990 11:08

Hello,


a customer of mine had an idea about 'fail-over'of ORACLE in a 
cluster and asked me if this could work. I didn't know the answer, 
so let me ask all of you.


The situation:

- 2 VAXes in a Cluster (one only for fail-over)
- An ORACLE running on each node
- Node 1 fails 

Imagine that there is a simulation of the DEADMAN-Lock of RDB via the 
Distributed Lock Manager, so that the ORACLE (or a watcher process) on 
the other node knows about the failure: Is it possible that the ORACLE 
on Node 2 does the recovery ?

Any idea ?


Thanks for input, 

		Christian

 



T.RTitleUserPersonal
Name
DateLines
665.1NopeCLYPPR::BOOTHWhat am I?...An Oracle?Tue Jun 12 1990 15:4210
    Oracle V6 doesn't in any way use the Distributed Lock Manager. So this
    scenario could be done if the customer were willing to write all his
    own failover code.
    
    Point two is that V6 may only have one active "instance" in a
    VAXcluster for each Oracle RDBMS. That is, if database A is the one
    being used, only one active Oracle RDBMS can function against that
    database. So even a "live" failover database would fail to function.
    
    ---- Michael Booth