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客户端性能较差,但 ONTAP 延迟正常—解决指南

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适用场景

ONTAP 9

  • 根据内部监控软件或客户疑虑报告的高端用户延迟。
  • 最终用户报告吞吐量低/性能不佳
  • 查看Data ONTAP和NetApp监控工具时、它们会显示低延迟

示例: vSphere在日志中报告高卷延迟或ESX主机报告延迟:

客户端性能不佳、但ONTAP延迟良好

2020-09-17T01:31:14.178Z cpu44:2098185)WARNING: ScsiDeviceIO: 1564: Device naa.600a0920002002020202020202020202 performance has deteriorated. I/O latency increased from average value of 744 microseconds to 1515626 microseconds.

示例qos statistics volume latency show 命令显示低延迟:

Cluster::> qos statistics volume latency show -volume Example_Vol -vserver VS1 Workload ID Latency Network Cluster Data Disk QoS Max QoS Min NVRAM Cloud FlexCache SM Sync VA --------------- ------ ---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- -total- - 2.21ms 101.00us 75.00us 400.00us 1.62ms 0ms 0ms 7.00us 0ms 0ms 0ms 0ms Example_Vol.. 3195 1295.00us 478.00us 0ms 777.00us 26.00us 0ms 0ms 14.00us 0ms 0ms 0ms 0ms

注意: 此外、 qos statistics volume performance show 由于机下延迟、请检查命令。

有关详细信息、请参阅文章: High y\f270 s性能 较高的客户端上可见、但QoS统计信息卷延迟不显示

 

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