The what-if command operation (eval, predict) is used to determine the impact of a cluster operation before the operation is executed. It helps administrators to maintain the cluster and minimizes the potential for surprises. what-if commands evaluation to test the effect of stopping, starting, relocating, modifying, or adding resources
srvctl stop database -db dba12c -eval
crsctl eval delete server glsdb01 -admin -f
The -admin option shows a summary of the server assignments resulting from the action
specified in the crsctl eval commands for cluster administrators.
Stage Group 1:
--------------------------------------------------------------------------------
Stage Number Required Action
--------------------------------------------------------------------------------
1 Y Server 'glsdb01' will be removed from pools
[Generic ora.DBAPOC ora.DBAQAC ora.DBATOOLS
ora.DBA12C ora.dba12c_dba12c_rac
ora.dba12c_dba12c_rpt]
Y Resource 'ora.DBA_DATA501.dg' (glsdb01) will
be in state [OFFLINE]
Y Resource 'ora.GI.dg' (glsdb01) will be in
state [OFFLINE]
Y Resource 'ora.LISTENER.lsnr' (glsdb01) will be
in state [OFFLINE]
Y Resource 'ora.LISTENER_SCAN1.lsnr' (1/1) will be
in state [OFFLINE]
Y Resource 'ora.MGMTLSNR' (1/1) will be in state
[OFFLINE]
Y Resource 'ora.asm' (glsdb01) will be in state
[OFFLINE]
Y Resource 'ora.dba12c.db' (1/1) will be in state
[OFFLINE]
Y Resource 'ora.dbatools.db' (1/1) will be in
state [OFFLINE]
Y Resource 'ora.glsdb01.vip' (1/1) will be in
state [OFFLINE]
Y Resource 'ora.mgmtdb' (1/1) will be in state
[OFFLINE]
Y Resource 'ora.net1.network' (glsdb01) will be
in state [OFFLINE]
Y Resource 'ora.ons' (glsdb01) will be in state
[OFFLINE]
Y Resource 'ora.scan1.vip' (1/1) will be in state
[OFFLINE]
2 Y Resource 'ora.MGMTLSNR' (1/1) will be in state
[ONLINE] on server [glsdb02]
Y Resource 'ora.glsdb01.vip' (1/1) will be in
state [ONLINE|INTERMEDIATE] on server
[glsdb02]
Y Resource 'ora.scan1.vip' (1/1) will be in state
[ONLINE] on server [glsdb02]
3 Y Resource 'ora.LISTENER_SCAN1.lsnr' (1/1) will be
in state [ONLINE|INTERMEDIATE] on server
[glsdb02]
Y Resource 'ora.mgmtdb' (1/1) will be in state
[ONLINE|INTERMEDIATE] on server [glsdb02]
--------------------------------------------------------------------------------
srvctl predict -help
The SRVCTL predict command evaluates the consequences of resource failure.
Usage: srvctl predict database -db <database_name> [-verbose]
Usage: srvctl predict service -db <database_name> -service <service_name> [-verbose]
Usage: srvctl predict asm [-node <node_name>] [-verbose]
Usage: srvctl predict diskgroup -diskgroup <diskgroup_name> [-verbose]
Usage: srvctl predict filesystem -device <volume_device> [-verbose]
Usage: srvctl predict vip -vip <vip_name> [-verbose]
Usage: srvctl predict network [-netnum <network_number>] [-verbose]
Usage: srvctl predict listener -listener <listener_name> [-verbose]
Usage: srvctl predict scan -scannumber <scan_ordinal_number> [-netnum <network_number>] [-verbose]
Usage: srvctl predict scan_listener -scannumber <scan_ordinal_number> [-netnum <network_number>] [-verbose]
Example: srvctl predict diskgroup -diskgroup GI -verbose
Resource ora.GI.dg will be started on nodes glsdb01,glsdb02
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