Berkeley DB

Remote Filesystems

When regions are backed by the filesystem, it is a common error to attempt to create Berkeley DB environments backed by remote filesystems such as the Network File System (NFS) or the Andrew File System (AFS). Remote filesystems rarely support mapping files into process memory, and even more rarely support correct semantics for mutexes after the attempt succeeds. For this reason, we strongly recommend that the database environment directory reside in a local filesystem.

For remote filesystems that do allow system files to be mapped into process memory, home directories accessed via remote filesystems cannot be used simultaneously from multiple clients. None of the commercial remote filesystems available today implement coherent, ...