Grid DBA

Simple troubleshooting note during Oracle Database 12.1.0.2.0 installation on Oracle Linux 6.6 If you get the message above after running OUI (runInstaller) the message simply indicates that OUI is unable to retrieve the name of the local node. To determine why this happens you can validate using hostname command.  For example: [oracle@matthew database]$ hostname --long hostname: Unknown host To get additional information use the --verbose flag. [oracle@matthew database]$ hostname --long --verbose gethostname()=`matthew' Resolving `matthew' ... hostname: Unknown host It now becomes obvious that the resolution using gethostname() is failing. Hostnames in Linux can be resolved using the /etc/hosts or a name server .e.g DNS. If a name server is not in use a quick check of /etc/hosts will reveal that an entry for the hostname (matthew) is not present. [oracle@matthew database]$ cat /etc/hosts 127.0.0.1 localhost.localdomain localhost ::1 loca...

This post is mostly a reminder to myself on how to install an EM12c shared agent. I found the documentation somewhat lacking, so I hope this will help someone else attempting to perform a shared agent installation. With a shared agent installation, a master agent is installed on a shared filesystem such as NFS and a shared agent is "installed" on remote hosts. The remote hosts should have read-only access to the share. The documentation lists the following pre-requisites for the mount options on the remote host. mount -t nfs -o ro : For example, run the following command: mount -t nfs -o ro abc.oracle.com:/scratch/masterAgent /scratch/sharedAgent Since I use a NAS for serving NFS shares in my environment I replaced the master_agent_host_name with the name of the filer and the exported volume. The shared agent will have its agent instance located on a local file system which contains configuration and host-specific information. When deploying an agent on N...