Dear all,
I have been very excited about the inline data compaction feature in ONTAP 9. I read Tech ONTAP and TR4476 and learnt that inline deduplication is orthogonal to inline compaction, which means inline deduplication and online compaction can be both enabled, but a block is inline deduplicated is not compacted.
https://www.netapp.com/us/media/tr-4476.pdf (Page 12)
http://community.netapp.com/t5/Tech-OnTap-Articles/A-Look-Inside-NetApp-Inline-Data-Compaction/ta-p/122362 (search for "orthogonal")
Why are this two features so mutually exclusive? Is there any nature or reason of inline dedupliation that prevents a deduplicated block from being compacted?
Any comment would be appriciated.