Opportunistic locking is supported for Client for Open Enterprise Server 2 SP4 and later. In order to take advantage of opportunistic locking, the client must be enabled for file caching.
To enable file caching for Client for Open Enterprise Server:
On the desktop, right-click the Client tray application icon in the status area, then select Client Properties.
In the Configuration dialog box, select Advanced Settings.
In the Parameter Groups drop-down list, select Performance, Cache.
(Conditional) On Client for Open Enterprise Server 2 SP4 (IR6) or earlier:
In the list of options, select File Caching and set its value to On
(Conditional) On Client for Open Enterprise Server 2 SP4 (IR7) or later:
To enable only read caching, in the list of options, select File Caching and set its value to Read only.
or
To enable both read and write caching, in the list of options, select File Caching and set its value to Read and Write.
Select OK to save and apply the settings.