Scaleout replication of an application

摘要

In one aspect, a method includes determining that a first quorum of servers is available at a production site and a target site and generating a group-set bookmark if the first quorum of servers is available. In another aspect, an article includes a non-transitory machine-readable medium that stores executable instructions. The instructions cause a machine to determine that a first quorum of servers is available at a production site and a target site and generate a group-set bookmark if the first quorum of servers is available. In a further aspect, an apparatus includes circuitry configured to determine that a first quorum of servers is available at a production site and a target site; and generate a group -set bookmark if the first quorum of servers available.

主权项

1. A method, comprising:
determining that a first quorum of servers is available at a production site and a target site; generating a group-set bookmark if the first quorum of servers is available; failing the operation of generating the group-set bookmark if there is not a first quorum of servers available: determining L servers, L servers indicating a union of a set of servers on the target site with an unavailable journal or a journal that does not include the group-set bookmark and a union of servers at a production site which are not available; determining if a set of N servers less the L servers forms a quorum, N being the set of servers on the target site; performing failover to currently used servers; allowing access to available volumes at the target site which are not part of the quorum; notifying an application that volumes are to be rebuilt; starting the replication of the volumes which are available also at the production site, wherein starting the replication of the volumes which are available also at the production site comprises replicating from working servers at the target site to the production site; exposing at a different point-in-time volumes for which the group-set bookmark failed; rebuilding the data on the volumes for which the group-set bookmark failed; and replicating the volumes for which the group-set bookmark failed, wherein the first quorum is a minimum number of servers available to run a distributed application from a total number of servers, and wherein a subset of the total number of servers is not available.