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在 ONTAP 9 中,用于衡量对 LUN 的间接数据访问的统计信息是什么?

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适用场景

ONTAP 9

问题解答

什么是对LUN的间接数据访问

这是指通过在  ‘拥有’存储LUN数据的聚合的节点以外的节点上配置的LIF访问LUN。这可能是 由于以下一种或多种情形导致的:

  • 主机多路径软件配置不正确、并使用非优化路径进行数据传输
  • LUN所属节点未配置SAN LIF
  • LUN选择性LUN映射配置不允许直接访问时
  • 端口集配置不当并阻止直接访问时
  • 如果网络结构发生原因出现错误、则主机将对非优化路径重试I/O

注意:在对LUN所属节点进行任何更改后,可能会记录远程操作,例如存储故障转移事件(接管/恢复)或LUN移动操作。在某些配置中、由于启动程序执行路径检查、少量操作可能是正常的。

在测量对集群模式Data ONTAP中LUN的间接数据访问时、应考虑以下两个计数器:

  • remote_ops
  • remote_bytes

::> set advanced

::*> statistics show-periodic -object lun -vserver <vserver_name> -instance <lun_path> -counter remote_ops|remote_bytes

 

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