Skip to main content
NetApp Knowledge Base

What is the Change in Physical Used Space Reporting for 9.14.1 and later

  1. Last updated
  2. Save as PDF
Views:
425
Visibility:
Public
Votes:
0
Category:
not set
Specialty:
CORE
Last Updated:

Applies to

  • ONTAP 9.14 and later
  • Space Management

Answer

The change in physical used space reporting in ONTAP 9.14 and later versions involves several key updates:

Introduction of Virtual-Used Field
  • Starting with ONTAP 9.14.1, a new field called virtual-used is introduced in diagnostic mode of the vol show command.
  • This field represents the current physical-used metric and is intended for internal consumers interested in volume blocks used (vvbns) instead of actual disk space used.
  • The virtual-used-percent field is also added to accommodate the current physical-used-percent .
Changes in Physical-Used Parameter
  • Before ONTAP 9.14.1, the physical-used parameter under the volume show command included all storage efficiency savings applied inside the volume.
  • With the introduction of TSSE volumes in ONTAP 9.10.1, more storage efficiency workflows now operate at the container level.
  • As a result, the physical-used metric no longer accurately reflects the physical used space of a volume because it does not account for aggregate-level savings such as TSSE, inline compression, compaction, and cross-volume deduplication.
Effective Total Footprint
  • The physical-used field value in the volume show CLI will be replaced with the value of the effective_total_footprint field from the vol show-footprint CLI.
  • The effective_total_footprint represents the total footprint used after savings reduction like TSSE and compaction savings, considering reserved blocks for volume-guarantee volumes as used.
Reporting for Different Versions
  • ONTAP 9.13.1 and below, the total physical used under the volume show command only provides volume-level savings.
  • The effective total footprint parameter under the vol show-footprint command provides the actual disk space used, considering savings from the aggregate level.
  • ONTAP 9.14.1 and above, the total physical used under the vol show-space command will include aggregate-level savings, similar to the effective total footprint under the vol show-footprint command.

 

Type of Savings <= 9.13.1 >=9.14.1
TSSE Non-TSSE TSSE Non-TSSE
Volume level savings Look for Total physical used from vol show-space command Look for Total physical used from vol show-space command Look for virtual-used from vol show-space vol -fields virtual-used command in diag mode only Look for virtual-used from vol show-space vol -fields virtual-used command in diag mode only
Volume + Aggregate Level savings Look for Effective Total Footprint from Vol show-footprint command Look for Effective Total Footprint from Vol show-footprint command Look for Total physical used from vol show-space command Look for Total physical used from vol show-space command

Additional Information

 

NetApp provides no representations or warranties regarding the accuracy or reliability or serviceability of any information or recommendations provided in this publication or with respect to any results that may be obtained by the use of the information or observance of any recommendations provided herein. The information in this document is distributed AS IS and the use of this information or the implementation of any recommendations or techniques herein is a customer's responsibility and depends on the customer's ability to evaluate and integrate them into the customer's operational environment. This document and the information contained herein may be used solely in connection with the NetApp products discussed in this document.