[LU-11137] Enable ZFS compression on MDT by default

• Type: Bug
• Resolution: Incomplete
• Priority: Minor
• Affects Version/s: Lustre 2.12.0
• Labels: DoM2
• Severity: 3
• Assignee: Mikhail Pershin
• Reporter: Andreas Dilger

Description

We should enable data compression on ZFS MDT filesystems by default in mkfs.lustre for new MDTs. There is already ZFS compression for metadata enabled at all times, but with DoM we will also store data on the MDT.

Since the MDT will typically also be located on flash storage, from a cost and performance perspective it makes sense to compress the data that is stored there.