跳转到主内容

什么是NFS挂载"noac"选项?

Views:
651
Visibility:
Public
Votes:
0
Category:
ontap-9
Specialty:
nas<a>NFSv3</a><a>问答环节</a><a />
Last Updated:

适用场景

ONTAP 9.  

问题解答

  • "noac"选项是一个可用于禁用属性缓存的客户端选项。
  • 默认情况下、此选项处于禁用状态。
  • 除非有非常具体的理由来启用"noac"选项、否则NetApp技术支持不建议启用此选项。
  • NFS属性缓存是文件和目录权限的本地缓存。
  • 禁用此缓存后、每次都必须进行新的查找、以验证文件和目录权限。  
  • 如果启用此选项、则IO操作会增加、性能会降低。

追加信息

  • "noac"挂载选项表示同步IO。要使写入操作以完成状态返回到应用程序、所有数据和文件系统元数据必须已访问NFS服务器。

  • "actimeo=0"选项会关闭属性缓存、但IO仍会异步执行到VFS层、客户端上的脏页面转储守护进程会稍后处理向NFS服务器写入数据的问题。

 

Sign in to view the entire content of this KB article.

New to NetApp?

Learn more about our award-winning Support

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.