Oracle clusterware 11gR2 supports only out-of-place upgrades.
*An in-place upgrade is intalled in the existing Clusterware home and replaces the older software.
*An out-of-place upgrade has both clusterware versions present on the nodes at the same time,in different Grid homes; but only one is active.
Install Oracle Clusterware in separate home before the upgrade reduces the down time for cluster upgrades.
The active software version and Grid Home location are stored in the OCR.Checking software versions
$crsctl query crs softwareversion [hostname]
$crsctl query crs activeversion
*An in-place upgrade is intalled in the existing Clusterware home and replaces the older software.
*An out-of-place upgrade has both clusterware versions present on the nodes at the same time,in different Grid homes; but only one is active.
Install Oracle Clusterware in separate home before the upgrade reduces the down time for cluster upgrades.
The active software version and Grid Home location are stored in the OCR.Checking software versions
$crsctl query crs softwareversion [hostname]
$crsctl query crs activeversion
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