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Oracle® ZFS Storage Appliance Analytics Guide, Release OS8.7.0

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Updated: March 2017
 
 

Disk: ZFS DMU Operations

This statistic shows ZFS DMU (Data Management Unit) operations/sec.

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 DDT (Data Deduplication Table) activity. For more information about data deduplication, see About the Oracle ZFS Storage Appliance in Oracle ZFS Storage Appliance Administration Guide, Release OS8.7.0.

ZFS DMU Operations Breakdowns

Table 67  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/...