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01-29-2006 08:30 PM
01-29-2006 08:30 PM
I am using OpenVMS 7.3-2.
Thanks in advance.
Solved! Go to Solution.
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01-29-2006 08:43 PM
01-29-2006 08:43 PM
SolutionI can hardby be considered an authority on this subject (maybe John G can jump in?) but I can only see one logical reasoning here:
IF the node on which the command is issued crashes during the processing of the command, then
a. the command has NOT yet reached the phase of communicating with the cluster. Effectively nothing has happened wrt the logical.
b. the cluster communication has been sent. Now if it is received by any other node, then that node ensures clusterwide consistency.
As said, I am not the expert, but it is hard to imagine anything not guaranteeing integrity in so important a piece of the OS EVER leaving Engeneering!
Proost.
Have one on me.
jpe
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01-29-2006 09:32 PM
01-29-2006 09:32 PM
Re: How fail save are cluster logicals
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01-29-2006 09:33 PM
01-29-2006 09:33 PM
Re: How fail save are cluster logicals
Wim
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01-30-2006 12:07 AM
01-30-2006 12:07 AM
Re: How fail save are cluster logicals
"In the second case (the simple defining of a single clusterwide logical via $CRELNM (which DCL DEFINE ultimately uses, of course)], the replication is synchronous; the $CRELNM call does not complete until all of the SCS messaging needed to deal with replication has completed. If a node is unable to replicate the logical name, it will die on its sword and crash. The point is to guarantee that the logical name is faithfully replicated across the cluster."
Purely Personal Opinion
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01-30-2006 12:11 AM
01-30-2006 12:11 AM