How does FabricPool inactive data reporting work?

When a block is written to the local tier, it is assigned a temperature value indicating that it is hot. Over time, a background cooling scan cools blocks, making hot blocks warm and eventually turning blocks cold if they have not been read. Assuming no activity, a block becomes cold based on the time set by the tiering-minimum-cooling-days setting.

Inactive Data Reporting

Once enabled, Inactive Data Reporting (IDR) monitors the underlying data access across a fixed 31-day cooling period to determine which data is considered cold or inactive.
Starting with ONTAP 9.8 the cooling period used by IDR can be adjusted for auto and snapshot-only tiering policies.

To verify that IDR is enabled on the aggregates, use the command storage aggregate show -fields is-inactive-data-reporting-enabled

Example:

::> storage aggregate show -fields is-inactive-data-reporting-enabled
aggregate is-inactive-data-reporting-enabled
----------------- ----------------------------------
aggr0_cluster1_01 false
aggr0_cluster1_02 false
cluster1_01_SSD_1 false
cluster1_02_SSD_1 false
4 entries were displayed.

If IDR is not enabled, use the command storage aggregate modify -aggregate -is-inactive-data-reporting-enabled true to turn on inactive data reporting.

To display how much data is inactive on a volume, use the AutoSupport section VOLUME.XML or volume show command with the -fields performance-tier-inactive-user-data,performance-tier-inactive-user-data-percent parameter

Example:

::> volume show -fields performance-tier-inactive-user-data,performance-tier-inactive-user-data-percent

vserver volume performance-tier-inactive-user-data performance-tier-inactive-user-data-percent
------- ------ ----------------------------------- -------------------------------------------
vsim1 vol0 0B 0%
vs1 vs1rv1 0B 0%
vs1 vv1 10.34MB 0%
vs1 vv2 10.38MB 0%
4 entries were displayed.

The performance-tier-inactive-user-data field displays the amount of inactive user data stored in the performance tier that could be tiered out to a cloud tier if the volume is in a FabricPool and for which the auto tiering policy has been specified
The performance-tier-inactive-user-data-percent field displays what percent of the data is inactive across the active file system and Snapshot copies

To display how much data is stored in the performance and cloud tiers for FabricPool per volume you run the command volume show-footprint or use AutoSupport section VOL STATUS -F

Example:

::> volume show-footprint -volume vol1

Vserver : SVM1
Volume : vol1

Feature Used Used%
-------------------------------- ---------------- -----
Volume Data Footprint 183GB 1%
Footprint in Performance Tier 8.85GB 5%
Footprint in StorageAccount 174GB 95%
Flexible Volume Metadata 1.04GB 0%
Delayed Frees 28.8MB 0%

Additional Information

Determining how much data in a volume is inactive by using inactive data reporting
Manage storage tiering by modifying a volume’s tiering policy or tiering minimum cooling period
Monitoring the space utilization for FabricPool
IDR is automatically enabled on all SSD aggregates on ONTAP 9.6 (and above), as well as on all FabricPool aggregates from ONTAP 9.4 onwards. Starting with ONTAP 9.6, IDR can be enabled on all other aggregates (including HDD aggregates) as well.

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.

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How does FabricPool inactive data reporting work?

Inactive Data Reporting

Additional Information

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