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SIS scan is extremely slow at gathering phase

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Applies to

  • ONTAP 9
  • Clustered Data ONTAP 8.3

Issue

  1. SIS scan is extremely slow at Gathering phase.
  2. SIS log just stops at Compressing and there is no further recording for slow scan task.

Example:

Tue Dec 15 10:51:35 2020 [Vserver UUID: 60a25723-700f-11e7-96c7-xxxxxxxxxxxx] /vol/volname [sid: 1607997095] Begin (sis start scan)
Tue Dec 15 10:51:35 2020 [Vserver UUID: 60a25723-700f-11e7-96c7-xxxxxxxxxxxx] /vol/volname [sid: 0] Info (Optimized scan)
Tue Dec 15 10:51:35 2020 [Vserver UUID: 60a25723-700f-11e7-96c7-xxxxxxxxxxxx] /vol/volname [sid: 1607997095] Compressing

 

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