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使用由 copy _wait 上的长时间暂停导致的常设专家委员会来降低虚拟机克隆速度

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适用场景

ONTAP 9.5

问题描述

使用 sis 克隆复制引擎 (SCE) 的虚拟机克隆应该非常快,因为它不涉及任何实际数据副本。但是在 ONTAP 9.5 上、人们注意到、常设专家委员会的性能下降了、而且它只提供与块复制引擎 (BBE) 类似的吞吐量。 
延迟的大部分来自 copy _wait 上的长时间暂停。
 示例:
COPY_WAIT
   WAFL_SPINNP_COPY             71573   120.78    813 


这种情况下, COPY_WAIT 上的平均挂起时间约为 120.78 毫秒。 

您可以从任何性能统计数据查看 WAFL 悬架统计数据或以手动方式进行收集:
nodeshell>priv set diag
nodeshell>wafl_susp -z  // clear the wafl_susp stats
wait for a while
nodeshell>wafl_susp -w // collect the wafl_susp stats

 

 

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