MidCloud: An agent-based middleware for effective utilization of replicated Cloud services

Nader Mohamed, Jameela Al-Jaroodi

    Research output: Contribution to journalArticlepeer-review

    11 Citations (Scopus)


    The Cloud relies heavily on resource replication to support the demands of the clients efficiently. Replicated Cloud services are distributed across large geographic areas and are accessible via the Internet. This paper describes MidCloud; an agent-based middleware that provides Cloud clients with dynamic load balancing and fault tolerance mechanisms for effective utilization of replicated Cloud services and resources. MidCloud can be used to connect clients with multiple replicated Cloud services and provide fast and reliable service delivery from multiple replicas. Several approaches for load balancing and fault tolerance in distributed systems were introduced; however, they require prior knowledge of the environment's operating conditions and/or constant monitoring of these conditions at run time that allows the applications to adjust the load and redistribute the tasks when operational conditions change and when failures occur. These techniques work well when there is no high communication delay. Yet, this is not true in the Cloud, where data storage and computation servers are scattered all over the world and communication delays are usually very high. MidCloud deploys approaches to reduce the negative impact of high and dynamic delays on the Cloud servers and the Internet. The experimental results show the positive effects of using MidCloud to provide efficient load balancing and fault tolerance.

    Original languageEnglish
    Pages (from-to)343-363
    Number of pages21
    JournalSoftware - Practice and Experience
    Issue number3
    Publication statusPublished - Mar 1 2015


    • Agents
    • Cloud computing
    • Fault tolerance
    • Internet
    • Load balancing
    • Middleware

    ASJC Scopus subject areas

    • Software


    Dive into the research topics of 'MidCloud: An agent-based middleware for effective utilization of replicated Cloud services'. Together they form a unique fingerprint.

    Cite this