NFS Mount Options for Ex Libris Products
Overview
To install Ex Libris products with NFS mounts under Unix/Linux OS requires you to use the correct mount options.
Using the correct mount option is also mandatory for Oracle database files. If the correct option is not used, Oracle fails to mount the database files located on the NFS mounts.
Note that the requirements are different for software mounts and for Oracle data files. Using the Oracle database mount options on a software disk may work, but performance may be affected.
Oracle Mount Options
The Oracle requirements for NFS mounts may change periodically and can be checked in Oracle support note 359515.1.
The following table relates to the Oracle software and database files for Oracle versions 11 to 12.
In the table below:
- Binaries is the shared mount points where the Oracle Home and CRS_HOME are installed.
- Datafiles includes online logs, control files, and data files.
The following table is for a single instance installation.
| Operating System | Mount Options for Binaries | Mount Options for Oracle Datafiles |
|---|---|---|
| Linux x86_64 | rw,bg,hard,rsize=32768,wsize=32768,vers=3,nointr,timeo=600,tcp | rw,bg,hard,rsize=32768,wsize=32768,vers=3,nointr,timeo=600,tcp,actimeo=0 |
In addition to the Oracle requirements, the nolock option is required in Linux and the llock option is required in Solaris to prevent locked issues that might cause database file locks and severe performance issues.
Additional Mount Options for Ex Libris Software
For most purposes, Ex Libris products work with the same mount options as the Oracle binaries. The following options are relevant only for dedicated NFS mounts (DB and software only) and not for NFS shared mounts:
- The nolock (Linux) llock (Solaris) options are required to prevent file locks and severe performance issues.
- Do not use the noac options in a shared installations.
- Make sure that actimeo is larger than 0, but under 60 to prevent jobd/batchd sync issues.
For all environments (binaries and database files on the same mount) Oracle recommends the use of Oracle DNFS - see Oracle document ID 762374.