RMAN backup at NFS mount point

RMAN backup at NFS mount point

To take rman backup at NFS mount point on Linux Platform from Oracle Database 11.2 add few rule:

Listing of required NFS options for 11.2.0.2 RMAN disk backup directory

The following NFS options must be specified for 11.2.0.2 RMAN disk backup directory:
Mount Options for Linux systems

Single Instance NFS Mount Options
---------------------------------
Mount options for Oracle Binaries

rw,bg,hard,rsize=32768,wsize=32768,vers=3,nointr,timeo=600,tcp

Mount options for Oracle Datafiles

rw,bg,hard,rsize=32768,wsize=32768,vers=3,nointr,timeo=600,tcp


RAC NFS Mount options
---------------------

Mount options for Oracle Binaries

rw,bg,hard,nointr,rsize=32768,wsize=32768,tcp, vers=3,timeo=600, actimeo=0


Mount options for Oracle Datafiles

rw,bg,hard,nointr,rsize=32768,wsize=32768,proto=tcp,noac,forcedirectio, vers=3,suid

The above values are starting recommendations as a starting point you can tune further
as required. To test which value of rsize/wsize is optimal for your system you can run
the testing outlined below.

First, we'll try transfers of 16384 blocks of 16k each from a unique file called /dev/zero
(when you read it, it's all zeroes, put out very quickly) to the test file. The time it takes to do this is our measure. From the client, command:

time dd if=/dev/zero of=/<mounted partition>/testfile bs=16k count=16384



MOS Note : ID 1117597.1