About RAC archiving schemes
The preferred RAC configuration uses a cluster file system archiving scheme. In this scheme, each node writes to a single Cluster File System (CFS) archived log destination and can read the archived log files of the other nodes.
Figure: CFS archiving scheme depicts a CFS archiving scheme.
If the CFS solution is not available, Oracle recommends a scheme like that in Figure: Non-CFS local archiving scheme with archive sharing. In Figure: Non-CFS local archiving scheme with archive sharing, each node archives to a local directory and writes a copy to each of the other nodes' archive directories. The locations are shared between the nodes (with read and write permissions) by NFS mounting the directory (UNIX) or sharing the locations (Windows).
Figure: Non-CFS local archiving scheme with archive sharing describes non-CFS local archiving scheme with archive sharing.
A scheme similar to the previous one exists if each node archives to a local directory, and the locations are shared (read-only) with the other nodes in the cluster. These locations are shared among the nodes by NFS-mounting the directory (UNIX) or sharing the locations (Windows). Therefore, each node can read each archive destination.
Figure: Non-CFS local archiving scheme with archive read-only sharing describes non-CFS local archiving scheme with archive read-only sharing.
The simplest archiving scheme is local archiving with no sharing. Each node writes only to the local destination, and no access is given to the other nodes in the cluster.
Figure: Non-CFS local archiving scheme with no archive sharing describes non-CFS local archiving scheme with no archive sharing.
For more information about configuration and additional archiving scheme examples see your Oracle documentation.