RE: Active/Passive "high availability"

  • From: "Kevin Closson" <kevinc@xxxxxxxxxxxxx>
  • To: <oracle-l@xxxxxxxxxxxxx>
  • Date: Fri, 13 Apr 2007 13:22:48 -0700

IN rac, while technically you have one database, you should have at
least two instances of that database (one per server), and assuming you
do not share your oracle home, you also have multiple oracle
installations, etc.  If your disks are properly mirrored onto separate
storage devices, you also have redundancy at the datafile level
(including the system tablespace).  You just have to set it up correctly


...mirrors do a really good job of producing a copy...even of ugly
stuff...I know since I look in the mirror when I shave. Mirrored system
tablespaces are there to protect against single drive failures. You
still only have 1 system tablspace-good, bad or ugly



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