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HCL BigFix Enpoint Management software scans .snapshot directory causing latency

Views:
37
Visibility:
Public
Votes:
0
Category:
ontap-9
Specialty:
perf
Last Updated:

Applies to

  • ONTAP 9
  • HCL BigFix

Issue

  • High latency is observed on the cluster
  • FlexVols have .snapshot directory access enabled

Example: This packet trace with the nfs.name==".snapshot" filter shows quite a few hits (truncated for brevity) from Wireshark and tshark

wireshark-hcl-bigfix.PNG

username@windows-PC-wsl:/mnt/c/Users/username/Desktop$ tshark -Y "nfs.name==".snapshot"" -r "a2a-2432_20210609_040708(1).trc1" | head
  109   0.000627 10.11.1.4 → 10.1.1.1  NFS 230 V3 LOOKUP Call, DH: 0xfc38f0fa/.snapshot
  158   0.002363 10.1.5.47 → 10.1.1.1  NFS 230 V3 LOOKUP Call, DH: 0xfc38f0fa/.snapshot
  202   0.015898 10.1.44.2 → 10.1.1.1  NFS 230 V3 LOOKUP Call, DH: 0xfc38f0fa/.snapshot
  703   0.019168 10.8.1.22 → 10.1.1.1  NFS 230 V3 LOOKUP Call, DH: 0xfc38f0fa/.snapshot
  725   0.019270 10.44.1.5 → 10.1.1.1  NFS 230 V3 LOOKUP Call, DH: 0xfc38f0fa/.snapshot
  768   0.019566 10.1.5.32 → 10.1.1.1  NFS 230 V3 LOOKUP Call, DH: 0x9a03f34a/.snapshot
 1198   0.044541 10.1.5.33 → 10.1.1.1  NFS 230 V3 LOOKUP Call, DH: 0xfc38f0fa/.snapshot
 1484   0.047528 10.1.5.34 → 10.1.1.1  NFS 230 V3 LOOKUP Call, DH: 0x9a03f34a/.snapshot
 1919   0.316793 10.1.5.35 → 10.1.1.1  NFS 230 [TCP ACKed unseen segment] [TCP Previous segment not captured] V3 LOOKUP Call, DH: 0xfc38f0fa/.snapshot
 2078   0.318461 10.1.5.36 → 10.1.1.1  NFS 230 V3 LOOKUP Call, DH: 0xfc38f0fa/.snapshot

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