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NFSv4 宽限期的工作原理是什么?

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适用场景

  • ONTAP 9
  • NFSv4

问题解答

有两个与NFSv4相关的宽限期:

  1. 将LIF移动到另一个节点时、NFSv4客户端可以在 NFS选项中指定的持续时间内回收锁定 -v4-grace-seconds

  2.将聚合重新定位到另一个节点时,在 locking.grace_lease_seconds 节点级别选项指定的持续时间内会发生NLM锁定回收。 

注意: NFSv3访问 也会受到此问题的影响。

注意: 在上述任一时间段内、 NFSv4客户端都无法获取新锁定。

追加信息

  • 接管后、这两个时间段可能会重叠。
  • 在交还中、接口的还原与聚合重新定位无关、并且可以单独观察这两个时间段。
  • 根据客户端重试NFS调用的时间、客户端应用程序遇到的I/O延迟可能比宽限期本身更长。
  • TR-4067
  • system node run (系统节点运行)(netapp.com)

 

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