Active IQ Alert: Discrepancies exist between VLDB and WAFL

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Visibility:: Public

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Category:: ontap-9

Specialty:: core

Last Updated:

Applies to

ONTAP 9
Write Anywhere File Layout (WAFL)
Volume Location Database (VLDB)
FlexGroup Volumes
Volume Autosize

Issue

Active IQ reports the following risk:

Discrepancies exist between VLDB (Volume Location Database) and WAFL (Write Anywhere File Layout)

The debug vreport show intermittently shows the volume differences:

::*> debug vreport show
volume Differences:

Name Reason Attributes
-------- ------- ---------------------------------------------------
svm:vol__0002
Present in VLDB and WAFL volume busy
Node Name: cluster-02
Volume DSID:1136 MSID:2155220372
UUID: unknown
Aggregate Name: aggr1_sata
Aggregate UUID: 34d3b393-9a18-4c7a-9047-47f345d07e28
Vserver UUID: 99a2525c-cf09-11ee-9fa8-d039fcc808af
AccessType: READ_WRITE
StorageType: REGULAR
Constituent Role: none

Event logs may also show frequent autosize shrink/grow events for FlexGroup constituents, e.g.:

Sun Mar 29 00:10:53 +0200 [cluster-01: wafl_exempt04: wafl_vol_autoSize_done_1:notice]: params: {'event_type': 'shrink', 'vol': 'vol__0002', 'app': '', 'volident': '@vserver:99a2525c-cf09-11ee-9fa8-d039fcc808af', 'size': '1.00GB', 'object_uuid': 'ab9f19c5-2n76-11f0-8fd1-d039eaa808af'}