4.3.5.4 DOWNGRADE CLUSTER

Use this command downgrade a previously upgraded cluster.

Syntax

DOWNGRADE CLUSTER
WHERE
   { CLUSTERNAME=cluster_name [ STEPNAME=step_name ] | 
     CLUSTERNUMBER=cluster_number [ STEPNAME=step_name ] | 
     ID=cluster_id [ STEPNAME=step_name ] }

Arguments

The following arguments are available in the WHERE clause:

• CLUSTERNUMBER: Specifies the cluster number in the es.xml, starting at 1

• CLUSTERNAME: Specifies the name of the cluster

• ID: Specifies the es.xml ID of the cluster

• STEPNAME : Optionally, specifies the individual downgrade step:

  1. RUN_ROOTSCRIPT
  2. CONFIG_HOME
  3. ADD_HOME

Usage Notes

• To use the command, you must use the es.xml that contains the upgraded cluster.

• The command can only downgrade a cluster in a VM deployment. You cannot use this command to downgrade the cluster in a physical (bare-metal) deployment.

• The command can only run if the DELETE_OLDHOME step has not been run on the upgraded cluster.

Example 4-8 Cluster Downgrade

The following example shows an OEDACLI session that uses the DOWNGRADE CLUSTER command along with typical output at each step.

oedacli> downgrade cluster where clusternumber=1
oedacli> save action
oedacli> merge actions
 processMerge
 processMergeActions
 Merging Action : downgrade cluster where clusternumber=1
 Merging DOWNGRADE CLUSTER
 Action Validated and Merged OK
oedacli> deploy actions
 Deploying Action ID : 4 downgrade cluster where clusternumber=1
 Deploying DOWNGRADE CLUSTER
 Downgrading Cluster
 Validating Target cluster version 12.2.0.1
 Validating Target Clusterware Home.. /u01/app/12.2.0.1/grid
 Checking Cluster status...
 Checking status of cluster...
 Checking clustereware file system /u01/app/12.2.0.1/grid
 Validating active cluster version.
 Active cluster version found on cluster ovmClus8 is 18.0.0.0
 Validating Inventory...
 Clusterware Home /u01/app/12.2.0.1/grid validation completed successfully
 Downgrading clusterware to 12.2.0.1
 Running rootcrs.sh on node dbm01adm01vm08.example.com
 Running rootcrs.sh on node dbm01adm02vm08.example.com
 Deregistering Clustereware Home /u01/app/18.13.0.0/grid from oracle inventory
 Registering Clusterware Home /u01/app/12.2.0.1/grid with oracle inventory
 Starting Clusterware stack using software home /u01/app/12.2.0.1/grid
 Removing /u01/app/18.13.0.0/grid from Oracle inventory...
 Updating inventory on dbm01adm01vm08.example.com
 Updating inventory on dbm01adm02vm08.example.com
 Unmounting file systems.....
 Unmounting file system /u01/app/18.13.0.0/grid on dbm01adm01vm08.example.com
 Unmounting file system /u01/app/18.13.0.0/grid on dbm01adm02vm08.example.com
 Updating /etc/fstab entries...
 Active cluster version after downgraded 12.2.0.1.0
 Clusterware successfully downgraded to 12.2.0.1.190115