| 主权项 |
1. A system, comprising:
one or more computing devices configured to:
identify, at a first non-committer node of a directed acyclic graph (DAG) of nodes designated to replicate a state of an application, at least a portion of a first replication pathway to a first committer node of the DAG, based at least in part on a first sequence of configuration-delta messages received from a fault-tolerant DAG configuration manager, wherein at least one other node of the DAG has received a different sequence of configuration-delta messages from the fault-tolerant DAG configuration manager;transmit, from the first non-committer node, for replication at respective local storage devices of one or more nodes along the first replication pathway, a state transition message indicating (a) approval of a first candidate state transition requested by a client and (b) a sequence number indicative of an order in which the first candidate state transition is processed at the first non-committer node relative to other candidate state transitions;in response to a determination, by the fault-tolerant DAG configuration manager, that a particular node of the first replication pathway is to be removed from the DAG,
initiate a transmission, from the fault-tolerant DAG configuration manager to one or more remaining nodes of the DAG, of a respective configuration-delta message indicating a removal of the particular node from the DAG, without directing the one or more remaining nodes to pause processing of state transitions. |
