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使用单个卷时性能低于预期

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Category:
ontap-9
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perf
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适用于

ONTAP 9

问题描述

  • 使用单个卷时性能低于预期
  • 在任何操作系统(Windows、Mac OS、Linux、ESX 等)或应用程序(Office、Oracle、ESXi、Hyper-V 等)中出现延迟或缓慢
  • 可能没有报告性能问题,但 CPU 仍频繁达到 90% 以上
  • 在 CPU 利用率低的卷上出现高延迟
    • 注:低端平台的 CPU 可能接近 50%,而高端平台的 CPU 可能接近 10-20%

示例:

  • 虚拟机的重新启动速度很慢。
  • 所有文件(Excel 和 Adobe 等)访问和应用程序(IE、Edge 等)都很慢。
  • 命令的输出  sysstat显示低平均 CPU 利用率
  • 的输出wafltop仅显示 vol1 上的高 I/O
  • vol1 占用了 Ops 的大部分
  • 没有来自其他卷的高延迟
CPU Utilization Percent Application Total STRIPE LAST_STRIPE STRIPEGROUP VOL_LOG VOL_VBN_RANGE VBN_RANGE VOL_VBN VBN VOL AGGR_VBN_RANGE AGGR_VBN AGGR SERIAL XCleaner ----------- -------- -------- -------- -------- -------- -------- -------- -------- -------- -------- -------- -------- -------- -------- ------- aggr1:vol1:cifs:WAFL_SPINNP_WRITE: 54 0 0 0 0 0 0 0 0 0 29 0 0 0 14 aggr1:vol2:cifs:WAFL_SPINNP_WRITE: 2 2 0 0 0 0 0 0 0 0 0 0 0 0 0 aggr1:vol3:cifs:WAFL_SPINNP_WRITE: 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 aggr1:vol4:cifs:WAFL_SPINNP_WRITE: 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 ... I/O utilization ---------MB Read---------- ---------MB Write--------- --------IOs Read---------- --------IOs Write--------- Application MB Total Standard ExtCache Hybrid Standard ExtCache Hybrid Standard ExtCache Hybrid Standard ExtCache Hybrid ----------- -------- -------- -------- -------- -------- -------- -------- -------- -------- -------- -------- -------- -------- aggr1:vol1:cifs:WAFL_SPINNP_WRITE: 2558 9 0 0 2549 0 0 0 0 0 1287 0 0 aggr1:vol2:cifs:WAFL_SPINNP_WRITE: 12 0 0 0 12 0 0 0 0 0 3 0 0 aggr1:vol3:cifs:WAFL_SPINNP_WRITE: 7 0 0 0 7 0 0 0 0 0 1 0 0 aggr1:vol4:cifs:WAFL_SPINNP_WRITE: 5 0 0 0 5 0 0 0 0 0 1 0 0 Cluster::> node run -node node1 -command sysstat -x 1 CPU NFS CIFS HTTP Total Net kB/s Disk kB/s Tape kB/s Cache Cache CP CP_Ty CP_Ph Disk OTHER FCP iSCSI FCP kB/s iSCSI kB/s in out read write read write age hit time [T--H--F--N--B--O--#--:] [n--v--p--f] util in out in out 13% 261 3 0 2927 222768 258592 104 0 0 0 12 100% 0% 0--0--0--0--0--0--0--0 0--0--0--0 1% 2663 0 0 0 0 0 0 15% 403 6 0 3040 255451 255197 116 0 0 0 12 100% 0% 0--0--0--0--0--0--0--0 0--0--0--0 2% 2631 0 0 0 0 0 0 5% 348 10 0 811 6094 9894 232 24 0 0 12 100% 0% 0--0--0--0--0--0--0--0 0--0--0--0 2% 453 0 0 0 0 0 0

 

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