How can one read a replicated data object?
When a user reads a replicated data object, SRB cycles through all the copies of the data object and reads the one that is accessible at that time. It uses a simple mechanism to order this list of replicated data objects. Copies stored in the resources belonging to the “cache” class (cache, temporary) will be put at the top of the list and copies stored in the “archival” class (archival, permanant) are put at the bottom of the list. For copies belonging to the same class, the copy stored on the same host as the one directly connected to the client will be picked first. After that, the copies within the same class will be picked randomly.
