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在 FlexGroup 成分卷上的 ONTAP 中出现高延迟

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Category:
ontap-9
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perf
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适用场景

  • ONTAP 9.2 到 9.7
  • FlexGroup

问题描述

  • 高延迟显示在 QoS 统计信息 volume performance show 中,而 QoS 统计信息卷延迟显示为 Data latency
  • 只有卷 __ 名称中包含的 FlexGroup 卷才会发生这种情况
  • 示例:
Cluster::> qos statistics volume performance show
Workload            ID     IOPS       Throughput    Latency
--------------- ------ -------- ---------------- ----------
-total-              -     1152        21.22MB/s    88.83ms
VOL1_FG_PRD__..   8777      282         2.22MB/s   195.11ms
VOL1_FG_PRD__..   7862      266         9.93MB/s    58.90ms
VOL2_FILE_NON..  27814      187       169.58KB/s   180.00us
VOL1_FG_PRD__..   3708      187         6.09MB/s    78.16ms
VOL1_FG_PRD__..  25459      144         2.72MB/s   118.99ms
volapplicatio..  27101       82        97.33KB/s   232.00us
VOL1_FILE_UAT..   5994        5            0KB/s   466.00us
 
 Cluster::> qos statistics latency show -iterations 0 -rows 10 -refresh-display false -node node1 Policy Group Latency Network Cluster Data Disk QoS Max QoS Min NVRAM Cloud FlexCache SM Sync VA -------------------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- -total- 64.69ms 593.00us 0ms 63.93ms 81.00us 0ms 0ms 89.00us 0ms 0ms 0ms 0ms User-Best-Effort 64.69ms 593.00us 0ms 63.93ms 81.00us 0ms 0ms 89.00us 0ms 0ms 0ms 0ms 
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