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Using MDFS with VVR

The volume set feature supports the multi-device enhancement to Veritas File System (VxFS). This feature (MDFS) allows file systems to make best use of the different performance and availability characteristics of the underlying volumes. For example, metadata for a file system could be stored on volumes with higher redundancy, and user data on volumes with better performance.

Best practices

• If you partially associate a volume set to an RVG, you must include the index 0 volume, which includes metadata regarding the file system. If you exclude the component volume that includes metadata, then the file system cannot be brought up on the Secondary because the metadata is not replicated.
• By default, every volume in an MDFS is metadataok, which means that the volume can also include metadata. If you want to exclude certain volumes for replication, then we recommend marking those volumes as dataonly volumes.