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Slow VMware vMotions on NFS due to default NFS TCP transfer size

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Category:
ontap-9
Specialty:
perf
Last Updated:

Applies to

ONTAP 9

VMware

Issue

  • Slow vMotions when migrating from one datastore to another, or possibly from one storage system to another
  • Writes may be slower than reads
  • Example: Reads may maximize a 10GbE link (1.2 GB/s), but writes don't go faster than 300 or 400 MB/s

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