1.通過執行ocrconfig -showbackup獲得
在節點1上執行
[oracle@dbrac1 ~]$ ocrconfig -showbackup
dbrac1 2012/01/04 10:00:03 /opt/oracle/product/crs/cdata/crs
dbrac1 2012/01/04 06:00:03 /opt/oracle/product/crs/cdata/crs
dbrac1 2012/01/04 02:00:03 /opt/oracle/product/crs/cdata/crs
dbrac1 2012/01/02 10:00:02 /opt/oracle/product/crs/cdata/crs
dbrac1 2011/12/25 01:59:53 /opt/oracle/product/crs/cdata/crs
在節點2上執行
[oracle@dbrac2 ~]$ ocrconfig -showbackup
dbrac1 2012/01/04 10:00:03 /opt/oracle/product/crs/cdata/crs
dbrac1 2012/01/04 06:00:03 /opt/oracle/product/crs/cdata/crs
dbrac1 2012/01/04 02:00:03 /opt/oracle/product/crs/cdata/crs
dbrac1 2012/01/02 10:00:02 /opt/oracle/product/crs/cdata/crs
dbrac1 2011/12/25 01:59:53 /opt/oracle/product/crs/cdata/crs
2. 還可以通過下面的語句獲得
$cat $ORA_CRS_HOME/log/`hostname`/cssd/ocssd* |grep master
or
$ for x in `ls -tr $ORA_CRS_HOME/log/`hostname`/cssd/ocssd* `; do grep -i "master node" $x ; done | tail -1
****************************************************另一種方法*************************************************************
Oracle 12.1.0.2c Standard Cluster: New Location / Name For Alert Log
In my last post, I had presumed there is a bug since I discovered an empty clusterware alert log in its conventional location i.e. $ORACLE_HOME/log/<hostname>in 12.1.0.2 standard cluster.
[grid@host01 ~]$ crsctl query crs activeversion;
Oracle Clusterware active version on the cluster is [12.1.0.2.0]
[root@host01 host01]# ls -l /u01/app/12.1.0/grid/log/host01/alerthost01.log
-rw-rw-r– 1 grid oinstall 0 Jun 15 14:10 /u01/app/12.1.0/grid/log/host01/alerthost01.log
But as commented by Ricardo Portillo Proni, in 12c, the location of alert log has been changed to $ORACLE_BASE/diag/crs/<hostname>/crs/trace/
Hence, I could successfully the alert log on node host01 in directory $ORACLE_BASE/diag/crs/host01/crs/trace/
[grid@host01 trace]$ ls -l $ORACLE_BASE/diag/crs/host01/crs/trace/alert*
-rw-rw—- 1 root oinstall 812316 Aug 11 10:22 /u01/app/grid/diag/crs/host01/crs/trace/alert.log
Another noticeable thing is that name of clusterware alert log has been changed to alert.log as compared to alert<hostname>.log in 11g.
I would like to mention that I have verified the above only in12.1.0.2 standard cluster.
In 12.1.0.1 flex cluster though, the location and name of alert log location is same as in 11g i.e. $ORACLE_HOME/log/host01
[root@host01 host01]# crsctl query crs activeversion
Oracle Clusterware active version on the cluster is [12.1.0.1.0]
[root@host01 host01]# ls -l $ORACLE_HOME/log/host01/alert*
-rw-rw-r-- 1 grid oinstall 497364 Aug 11 11:00 /u01/app/12.1.0/grid/log/host01/alerthost01.log
Conclusion:
12.1.0.2 standard cluster
- Name of alert log : alert.log
- location of alert log: $ORACLE_BASE/diag/crs/host01/crs/trace
12.1.0.1 flex cluster
- Name of alert log : alert<hostname>.log
- location of alert log: $ORACLE_HOME/log/host01
Hope it helps!
Pls refer to comments for further information.
References:
Oracle RAC 12c (12.1.0.2) Operational Best Practices (Oracle Presentation)
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Related Links :
Oracle 12.1.0.2 Standard Cluster: Empty Alert Log