About MSDP stream handlers
NetBackup provides the stream handlers that process various backup data stream types. Stream handlers improve backup deduplication rates by processing the underlying data stream.
For data that has already been deduplicated, the first backup with a new stream handler produces a lower deduplication rate. After that first backup, the deduplication rate should surpass the rate from before the new stream handler was used.
Veritas continues to develop additional stream handlers to improve backup deduplication performance.