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如何降低 ONTAP 9 中工作负载驱动的磁盘利用率

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适用于

ONTAP 9

问题描述

  • 由于用户工作负载导致同时执行太多操作,出现磁盘 IO 延迟。
  • 来自特定 SVM/聚合的多个卷报告高延迟。

2009703769 - AIQUM Latency.png

  • 使用 Active IQ Unified Manager 或qos statistics volume latency show,延迟将显示在磁盘或聚合处理(Active IQ Unified Manager)中,并且延迟会积极影响目标卷。

示例:

cluster1::> qos statistics volume latency show -vserver svm1 -volume vol1 Workload ID Latency Network Cluster Data Disk QoS Max QoS Min NVRAM --------------- ------ ---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- -total- - 4.71ms 185.00us 7.00us 468.00us 4.04ms 0ms 0ms 11.00us vol1 32140 22.22ms 86.00us 125.00us 904.00us 21.11ms 0ms 0ms 1.00us -total- - 4.58ms 253.00us 7.00us 991.00us 3.32ms 0ms 0ms 11.00us vol1 32140 29.69ms 90.00us 162.00us 2.61ms 26.82ms 0ms 0ms 1.00us -total- - 2.55ms 229.00us 8.00us 589.00us 1.71ms 0ms 0ms 13.00us vol1 32140 18.84ms 61.00us 314.00us 136.00us 18.32ms 0ms 0ms 1.00us -total- - 4.33ms 198.00us 9.00us 1221.00us 2.88ms 0ms 0ms 13.00us vol1 32140 177.16ms 113.00us 226.00us 108.03ms 68.79ms 0ms 0ms 2.00us
  • qos 命令 qos statistics workload resource disk show list User-Default 作为最重要的 DISK 工作负载。

示例:

cluster1::> qos statistics workload resource disk show -node nodeB Workload ID Disk Number of HDD Disks --------------- ------ ----- ------------------- -total- - 98% 44 User-Default - 83% 44 _Efficiency_... - 10% 44 _WAFL - 3% 44 _RAID - 2% 44

 

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