Good day,
I have an Sun Oracle 11 setup that mounts LUNs from an EMC san.
In basic testing we noticed that it it takes a very long time to write files to the lun if we use forcedirectio in /etc/vfstab in the mount options. Remove these and the speed increases dramatically.
Also, in the SHOW PARAMETER FILESYSTEMIO_OPTIONS we see 'async' as the option.
Question: Is there a best practice document for setting up a filsystem for Oracle when attaching to SAN and does the FILESYSTEMIO_OPTIONS make a difference?
thanks.