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如何增加集群间和集群内卷SnapMirror的TCP接收窗口缓冲区大小

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适用场景

  • ONTAP 9
  • 集群模式Data ONTAP 8.

问题描述

集群间和集群内SnapMirror使用名为ctlopcp 的网络服务。 

  • ctlopcp 服务 为集群间和集群内连接提供了一个可调TCP接收缓冲区窗口。
    • 集群间TCP 接收缓冲区窗口默认为2 MB、集群内TCP接收缓冲区窗口默认为256 KB。
    • TCP接收缓冲区窗口可增加到7 MB、也可减少到256 KB。
  • 使用大容量WAN连接时、增加集群间TCP接收缓冲区窗口可以提高有效吞吐量。
    • 但是、由于用于复制的活动TCP流数量增加、可能没有必要执行此操作。
    • 有关详细信息,请参见  TR-4015中的第2.4节“如何更改TCP接收缓冲区大小”。
  • 默认情况下、集群间TCP接收缓冲区窗口自动调整。
    • 每个TCP流从64 KB开始、并增长到最大配置值(默认为2 MB) 、以支持集群间复制。
    • 一旦增大、只要TCP流保持打开状态、接收缓冲区窗口就不会缩小。

 

 

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