跳转到主内容

用户延迟较高或吞吐量较低,但 ONTAP 延迟不超过 5 毫秒

Views:
54
Visibility:
Public
Votes:
0
Category:
ontap-9
Specialty:
perf
Last Updated:

适用场景

  • ONTAP 9
  • 集群模式 Data ONTAP 8

问题描述

  • 内部监控软件或客户问题报告的最终用户延迟较高。
  • 最终用户报告的吞吐量低 / 性能差
  • Data ONTAP 和 NetApp 监控工具在以下情况下会显示低延迟 已审核

示例: vSphere 报告卷延迟较高或 ESX 主机在日志中报告延迟。

KCS_QOS1.png

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,由于 qos statistics volume performance show 机下延迟,请检查命令。

有关详细信息,请参见文章:在客户端上看到高延迟,但在 QoS 统计信息卷延迟显示中看不到

 

CUSTOMER EXCLUSIVE CONTENT

Registered NetApp customers get unlimited access to our dynamic Knowledge Base.

New authoritative content is published and updated each day by our team of experts.

Current Customer or Partner?

Sign In for unlimited access

New to NetApp?

Learn more about our award-winning Support