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High CIFS access latency after running on-demand vscan because AV Connector input queue is getting full

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445
Visibility:
Public
Votes:
2
Category:
ontap-9
Specialty:
cifs
Last Updated:

Applies to

  • ONTAP 9
  • ONTAP Antivirus Connector (AV Connector)1.0.4
  • Trend Micro ServerProtect for Storage 6.0 Build 1119

Issue

  • CIFS access gets too slow after running the on-demand vscan.
  • This message occurs when a CIFS operation times out because it could not be processed completely within 40 seconds.

Tue Dec 08 11:23:26 CET [Node-01: kernel: Nblade_CifsOperationTimedOut_1:error]: params: {'remoteBladeID': 'xxx-xxxxxxxxxxxx (Node-02)', 'cmdRestartCnt': '0', 'vserverId': '5', 'commandName': 'SMB2_COM_CREATE', 'isQosEnabled': 'QoS_disabled', 'lastSpinNpError': 'SPINNP_ERR_OFFBOX_VSCAN_REQD', 'localIpAddress': '1.1.1.1', 'lastCsmError': 'CSM_OK', 'clientIpAddress': '10.10.10.20', 'suspensionCnt': '6', 'dsId': '0'}

  • The AV Connector queue: scanner_stats_pct_input_queue_avg is keeping a high usage (over 90%) even the on-demand vscan is stopped and vscan workloads are getting decreasing.

Example:

:*>  statistics show-periodic -interval 10 -object offbox_vscan_server -counter scanner_stats_pct_input_queue_avg|scan_request_timedout|scan_request_pending|scan_request_dispatched|scanner_stats_is_queue_full -instance svm01:xx.xx.xx.xx:sr-2650-04-01
sr-2650-04: offbox_vscan_server.svm01:10.xx.xx.xx:sr-2650-04-01: 6/3/2021 23:26:12
       scan     scan     scan scanner_stats_is scanner_stats_pct_input
    request  request  request            queue                   queue    Complete    Number of
 dispatched  pending timedout             full                     avg Aggregation Constituents
 ---------- -------- -------- ---------------- ----------------------- ----------- ------------
         58      500        3                0                      97      Yes      1
         53      500        0                0                      98      Yes      1
         54      500        0                0                      98      Yes      1
         64      500        0                0                      98      Yes      1
         55      500        0                0                      98      Yes      1
         56      500        0                0                      98      Yes      1
         63      500        0                0                      98      Yes      1
         55      498        2                0                      98      Yes      1
         60      500        2                0                      98      Yes      1
         91      270      261                0                      98      Yes      1
         56      220       50                0                      98      Yes      1
         59      220        0                0                      98      Yes      1

 

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