Disk: ZFS DMU Operations
This statistic shows ZFS Data Management Unit (DMU) operations/second.
An understanding of ZFS internals is required to properly interpret this statistic.
When to Check ZFS DMU Operations
Troubleshooting performance issues, after all relevant standard Analytics have been examined.
The DMU object type
breakdown can identify if there is excessive Data Deduplication Table (DDT) activity. For more information about data deduplication, see Data Deduplication in Oracle ZFS Storage Appliance Administration Guide, Release OS8.8.x.
ZFS DMU Operations Breakdowns
Table 6-17 Breakdowns of ZFS DMU Operations
Breakdown | Description |
---|---|
type of operation |
Read/write/... |
DMU object level |
Integer |
DMU object type |
ZFS plain file/ZFS directory/DMU dnode/SPA space map/... |