The present invention discloses a distributed storage and replication system and a method. The system includes at least one metadata control (MDC) module, multiple IO routing modules, and multiple object-based storage device (OSD) nodes, where the MDC module is adapted to configure, for each OSD node, at least one logical partition (partition) corresponding to physical storage resources managed by each OSD node; the IO routing module is adapted to route a received IO request to an OSD node; and the OSD node is adapted to execute, according to the IO request, storage of data corresponding to the IO request, where the MDC determines that an OSD node in the system is a faulty OSD node, determines a partition on the faulty OSD node, updates a partition view of a partition group that includes the partition on the faulty OSD node, and sends an updating notification to a primary OSD node in the updated partition view; and the primary OSD node is adapted to process, according to the updated partition view after receiving the updating notification sent by the MDC module, replication of the data corresponding to the IO request. According to embodiments of the present invention, processing performance, fault tolerance, and availability of consistency replication are improved.