CVU介绍

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本文介绍了 Oracle 11.2.0.2 中新增的 Cluster Verification Utility (CVU) 资源。CVU 是一个集群感知资源，通过 grid 用户的 scriptagent 执行，每六小时运行一次，用于验证集群健康状态。文章还提供了如何手动检查 CVU 的方法及日志位置。

ORA.CVU
New resource (Cluster Verification Utility) is added in 11.2.0.2

Unlike the previous resources, the cvu resource is actually cluster aware. It’s the Cluster Verification Utility we all know from installing RAC. Going by the profile (shown below), I conclude that the utility is run through the grid software owner’s scriptagent and has exactly 1 incarnation on the cluster. It is only executed every 6 hours and restarted if it fails. If you like to execute a manual check, simply execute the action script with the command line argument “check”.

[root@node1 tmp]# crsctl stat res ora.cvu -p
NAME=ora.cvu
TYPE=ora.cvu.type
ACL=owner:grid:rwx,pgrpinstall:rwx,other::r--
ACTION_FAILURE_TEMPLATE=
ACTION_SCRIPT=%CRS_HOME%/bin/cvures%CRS_SCRIPT_SUFFIX%
ACTIVE_PLACEMENT=1
AGENT_FILENAME=%CRS_HOME%/bin/scriptagent
AUTO_START=restore
CARDINALITY=1
CHECK_INTERVAL=21600
CHECK_RESULTS=
CHECK_TIMEOUT=600
DEFAULT_TEMPLATE=
DEGREE=1
DESCRIPTION=Oracle CVU resource
ENABLED=1
FAILOVER_DELAY=0
FAILURE_INTERVAL=0
FAILURE_THRESHOLD=0
HOSTING_MEMBERS=
LOAD=1
LOGGING_LEVEL=1
NLS_LANG=
NOT_RESTARTING_TEMPLATE=
OFFLINE_CHECK_INTERVAL=0
PLACEMENT=balanced
PROFILE_CHANGE_TEMPLATE=
RESTART_ATTEMPTS=5
SCRIPT_TIMEOUT=600
SERVER_POOLS=*
START_DEPENDENCIES=hard(ora.net1.network)
START_TIMEOUT=0
STATE_CHANGE_TEMPLATE=
STOP_DEPENDENCIES=hard(ora.net1.network)
STOP_TIMEOUT=0
TYPE_VERSION=1.1
UPTIME_THRESHOLD=1h
USR_ORA_ENV=
VERSION=11.2.0.2.0The action script $GRID_HOME/bin/cvures implements the usual callbacks required by scriptagent: start(), stop(), check(), clean(), abort(). All log information goes into $GRID_HOME/log/`hostname -s`/cvu.

The actual check performed is this one: $GRID_HOME/bin/cluvfy comp health -_format & > /dev/null 2>&1

[oracle@test-server1]~% srvctl config cvu
CVU is configured to run once every 360 minutes

[oracle@test-server1]~% srvctl status cvu
CVU is enabled and running on node test-server1

CVU is nothing but cluster verification utility which now would run once every 6 hours(This is configurable and can be changed using srvctl modify). You can see the logs under $GRID_HOME/log/`hostname -s`/cvu

so If its status shows as offline, then no need to wory about. Cluster verification utility get interacted with this resource to get you the results of cvu. If you are not running RAN CLUVFY then its OK..