Obtains transactions from the reader server and passes them to apply servers In general, ACMS is limited to small, nonblocking state changes for a limited set of cross-instance operations.ĭatabase Apply Process Coordinator Process As a result, this process can exhibit a variety of behaviors. ACMS is the process in which a distributed operation is called. The ACMS process works with a coordinating caller to ensure that an operation is executed on every instance in Oracle RAC despite failures.

These membership changes are required for the file system to maintain file system consistency within the cluster.Ītomic Control File to Memory Service ProcessĬoordinates consistent updates to a control file resource with its SGA counterpart on all instances in an Oracle RAC environment The ACFS process delivers CSS membership changes to the cluster file system. Tracks the cluster membership in CSS and informs the file system driver of membership changes Oracle Advanced Cluster File System (Oracle ACFS) CSS Process ABMR and BMR n terminate after being idle for a long time. When a process submits a block media recovery request to ABMR, it dynamically spawns slave processes (BMR n) to perform the recovery. Coordinates execution of tasks such as filtering duplicate block media recovery requests and performing flood control

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