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. $ORACLE_HOME/log/<hostname>in 220.127.116.11 standard cluster.
[grid@host01 ~]$ crsctl query crs activeversion; Oracle Clusterware active version on the cluster is [18.104.22.168.0] [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 oracle clusterware 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 in 22.214.171.124 standard cluster.
In 126.96.36.199 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 [188.8.131.52.0] [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
184.108.40.206 standard cluster
- Name of alert log : alert.log
- location of alert log: $ORACLE_BASE/diag/crs/host01/crs/trace
220.127.116.11 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.
Oracle RAC 12c (18.104.22.168) Operational Best Practices (Oracle Presentation)
Oracle 12c RAC: Clusterware logs are now centralized
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