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Poor MetroCluster performance during RAID Scrubs

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Category:
ontap-9
Specialty:
perf
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Applies to

  • ONTAP 9
  • MetroCluster

Issue

  • Latency increases when RAID Scrub is running in a MetroCluser environment.
  • Increased latency comes from
    • Disk layer directly
    • or WAFL Susp CP when the busy disks lead to Back to Back (B/b) CPs
  • Front-end IOs and Disk IOs from the local plex remain stable

 

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