跳转到主内容

LUN 的快照如何工作?

Views:
128
Visibility:
Public
Votes:
0
Category:
ontap-9
Specialty:
san
Last Updated:

适用于

Data ONTAP

解答

  • Snapshot 是本地保留的数据只读时间点映像
  • 执行 LUN 快照时、 Snapshot 会将指针复制到磁盘上相应的 LUN 块。没有复制或移动数据。
  • 当 LUN 数据发生更改时、会将其写入磁盘上的新块。Snapshot 将继续指向包含旧数据的块。
  • Snapshot 技术是 Data ONTAP 的一项功能。 

3014144__en_US__3014144 snapshot.jpg

  • 用于 snap delta 显示 Snapshot 副本之间的数据更改率。如果使用时没有任何参数、则会显示系统中所有卷的快照之间数据的更改速率、或系统中所有聚合snap delta -A的更改速率。

snap delta [ vol_name] [ snapshot-name ] [ snapshot-name ]

  • 如果指定了卷,则会显示该特定卷的数据更改率

snap reclaimable <volname snapshot-name>  显示在以下情况下要回收的空间量 此时将从卷中删除上述快照列表
 3014144__en_US__3014144Image_4.jpg

其他信息

附加信息 _text

 

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.