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Read throughput is lower than write throughput due to low cache hit rate

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Category:
ontap-9
Specialty:
perf
Last Updated:

Applies to

  • ONTAP 9
  • CIFS/SMB Protocol
  • FAS systems with HDD disk(SATA or SAS)

Issue

  • Read throughput on a specific volume is significantly lower than write throughput during file transfer.
  • Read latency is much higher than write latency.
  • Disk I/O is the primary contributor to read latency

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