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为什么在云 IC 发生故障后,云分层数据会从本地层复制?

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core<a>2009120162</a><a>用于翻译</a>
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适用场景

  • ONTAP 9
  • FabricPool
  • 云集群间( IC ) LIF 已关闭
  • 共享卷分层策略为 all

问题解答

  • 即使云集群间( IC ) LIF 因 SSD 块尚未重复使用而关闭,仍可读取数据。
  • 当 ONTAP 分层数据时,卷容器文件中的 ONTAP 分层。卷中的文件在其间接块中仍具有旧的 SSD 块地址。
  • 出现读取操作时, WAFL 会首先尝试使用该 SSD 地址。如果 SSD 仍包含该块,则所有上下文检查都将成功, ONTAP 将使用该数据来处理读取请求。如果块已重复使用,则上下文检查将失败, ONTAP 会将读取重定向到存储在容器文件中的新云地址 ONTAP 。
  • 因此,当 IC LIF 关闭时,数据可以从本地层复制,因为卷的间接块中仍包含旧的 SSD 块地址。

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