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利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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适用场景

ONTAP 9

问题描述

  • 利用单个卷时性能低于预期。
    • 任何操作系统( Windows , Mac OS , Linux , ESX 等)或应用程序( Office , Oracle , ESXi , Hyper-V 等)均会出现延迟或速度缓慢
  • CPU 利用率较低的卷上的高延迟。

示例:

  • 命令输出sysstat 显示较低的平均 CPU 利用率
  • 和命令的输出qos statistics volume performance showqos statistics volume latency show 仅在 vol1 上具有高延迟
  • vol1 会占用大多数操作
  • 其他卷没有高延迟
 Cluster::> qos statistics volume latency show Workload ID Latency Network Cluster Data Disk QoS NVRAM Cloud --------------- ------ ---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- -total- - 1057.00us 118.00us 86.00us 210.00us 609.00us 34.00us 0ms 0ms vol1-wid25471 25471 20.76ms 598.00us 2.44ms 17.37ms 0ms 0.35ms 0ms 0ms vol2-wid15658 15658 428.00us 155.00us 0ms 273.00us 0ms 0ms 0ms 0ms vol3-wid47232 47232 316.00us 128.00us 0ms 188.00us 0ms 0ms 0ms 0ms vol4-wid38152 38152 471.00us 130.00us 0ms 341.00us 0ms 0ms 0ms 0ms cluster1::> qos statistics volume performance show Workload ID IOPS Throughput Latency --------------- ------ -------- ---------------- ---------- -total- - 14996 859.84MB/s 1044.00us vol1-wid25471 25471 14581 569.00MB/s 522.28ms vol2-wid15658 15658 80 8.33MB/s 2.30ms vol3-wid47232 47232 72 1.00MB/s 2.12ms vol4-wid38152 38152 70 0.67MB/s 2.12ms 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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