Abstract:
Cloud computing is becoming increasingly
popular and cloud storage services attract more
attentions for their high security and availability with
a low cost. Cloud storage is expected to become the
main force of the future storage market. To achieve
high data availability, cloud storage services rely on
replication. Data replication is a widely used
technology in quorum based data center distributed
storage system. In such systems, it is important to
choose a closest set of replicas to service a client
request for increasing performance and reliability.
Static replica selection would be suboptimal even
over a dedicated infrastructure. Suboptimal replica
choices result in reduced performance as a result of
increased response latency. In this paper, a
consistent replica selection mechanism is proposed to
automatically select number of consistent replicas by
searching nearest replicas and selecting consistent
replicas depends on current time, nearest arrival
time, read/write latency and version for each read
request. This mechanism tends to achieve the
performance of client requests for cloud services by
reducing latency cost.
