In micrographics, a measure of the remoteness of the copy from the original material, the first microfilm representation being the first generation microfilm.
This paper proposes a new Calking Dynamic Replication Distribution Algorithm(CDRDA) considering the communication cost among storage resource brokers and the characteristic of data accessing.
The Operating License has the original and the duplicate.The original is held by the operator of the taxicar, and the duplicate is reserved by the municipal transport department for check.