How to disable the oplock mechanism on Red Hat Enterprise Linux 7 and 8 SMB clients?

Issue

Sometimes there is a specific technical need or requirement to disable the oplock mechanism on Red Hat Enterprise Linux 7 and 8 SMB clients. Oplocks allow SMB clients to lock files and locally cache information while preventing other users from modifying a given file. You may need to disable oplocks under the following circumstances:

• You are using a database application whose documentation recommends that oplocks be disabled.
• The SMB clients are on an unreliable network.
• You are handling critical data and you cannot afford even the slightest data loss.