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ONTAP 9.8 或更高版本中的 EAGAIN 是否需要增加 FPolicy 发送缓冲区?

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ontap-9
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nas<a>2009094200</a>
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适用场景

  • ONTAP 9.8 或更高版本
  • FPolicy

问题解答

否,在大多数情况下

追加信息

  • ONTAP 9.7 及更早版本的 EAGAINA 在固定 2 秒内发生倒带
    • 2 秒窗口创建了一个环路:
      • FPolicy 服务器可能会填充速度缓慢的发送缓冲区
      • 每次倒带时, I/O 都会在队列中停留 2 秒,并且可能需要几秒或几十秒才能完成处理
      • 由于每 2 秒倒带,即使 FPolicy 服务器出现临时性能问题,队列也不会清除
      • 唯一的方法是,如果 I/O 中断到接近零的时间段,或者手动干预以禁用 FPolicy
  • ONTAP 9.8 的 EAGAIN 倒带窗口要小得多,因此,当 FPolicy 服务器开始响应时,可以清除队列
  • 要考虑增加发送缓冲区大小,需要满足以下条件:
NetApp provides no representations or warranties regarding the accuracy or reliability or serviceability of any information or recommendations provided in this publication or with respect to any results that may be obtained by the use of the information or observance of any recommendations provided herein. The information in this document is distributed AS IS and the use of this information or the implementation of any recommendations or techniques herein is a customer's responsibility and depends on the customer's ability to evaluate and integrate them into the customer's operational environment. This document and the information contained herein may be used solely in connection with the NetApp products discussed in this document.