RE: Some Dataguard is good, lots more must be better?(specifically, when do most actual failovers really occur?)

  • From: "Kevin Closson" <kevinc@xxxxxxxxxxxxx>
  • To: <oracle-l@xxxxxxxxxxxxx>
  • Date: Wed, 20 Sep 2006 13:50:21 -0700

        My best site ever was an airport, where they use to do a
switchover on a regular basis. Every last Sunday of the month they
switched between the Tower DC and the Terminal DC. 3-4 times a year they
found out that some interface had a flaw. Imagine what would have
happened if the first failover was performed after 2 or 3 years and
would result in 6-12 flawing interfaces. BTW, Kevin, storage replication
wouldn't have prevented this in all cases. It was due to missing links
of new interfaces (the cabling was simply not there) and alike as well
as flawing change procedures ( a file was altered in just one site ISO
2). there the only cabling this standby had was the one DG was sending
redo over? Weird.


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