DISASTER TOLERANCE METHOD AND APPARATUS IN ACTIVE-ACTIVE CLUSTER SYSTEM

摘要

Embodiments of the present invention disclose a method and an apparatus for redundancy in an active-active cluster system, and relate to the field of communications technologies, to resolve a prior-art problem that a storage array B cannot stop a service in time because of uncontrollable factors during running of storage arrays, causing I/O fencing. The present invention is applied to a system including a host cluster and at least one pair of storage arrays. The host cluster includes a quorum host, the quorum host includes a quorum unit, and the quorum host is an application host having a quorum function. A pair of storage arrays includes a first storage array and a second storage array. The quorum host receives a quorum request; temporarily stops delivering a service to the first storage array and the second storage array; determines, from the first storage array and the second storage array, which is a quorum winning storage array and which is a quorum losing storage array according to logic judgment; stops the service with the quorum losing storage array; sends quorum winning information to the quorum winning storage array; and resumes the delivered service between the host cluster and the quorum winning storage array.