Team Cooperation

When developing the solution in a team environment, team cooperation is an essential requirement. This is where, although it can be changed later, a cooperation model must be chosen.

If you remember from Chapter 1, there are two main approaches in SCM when it comes to cooperation models:

• Check out-Modify-Check in

• Modify-Merge-Commit

Visual SourceSafe is built around the Check out-Modify-Check in model. This model has two sub-models of operation:

• Exclusive Check-Out Model

• Multiple Check-Out Model

Choosing a Check-Out Model

The Exclusive Check-Out Model uses a pessimistic concurrency scheme characterized by a Lock-Modify-Unlock mode of operation because it allows only one user at a time to modify a resource.

The Multiple Check-Out Model uses an optimistic concurrency scheme characterized by a Copy-Modify-Merge mode of operation because it allows multiple users at a time to modify a resource, after which a merge operation is performed. During the merge operation conflicts may appear...