The consistent hash algorithm used in Red Hat JBoss Data Grid's distribution mode can locate entries deterministically, without multicasting a request or maintaining expensive metadata.
PUT operation can result in as many remote calls as specified by the
num_copies parameter, while a
GET operation executed on any node in the cluster results in a single remote call. In the background, the
GET operation results in the same number of remote calls as a
PUT operation (specifically the value of the
num_copies parameter), but these occur in parallel and the returned entry is passed to the caller as soon as one returns.