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ONTAP 是否会将效率应用于仅存在于 Snapshot 中的块?

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适用场景

  • ONTAP 9
  • 活动文件系统(AFS)
  • Snapshot
  • 效率
  • 重复数据删除
  • 数据压缩
  • 数据缩减

问题解答

不可以、ONTAP仅对 活动文件系统(AFS)中的块进行重复数据删除。

追加信息

  • 从AFS中删除块后、如果该块仍位于快照中、则后续效率操作将不再考虑对该块进行重复数据删除。
  • -snapshot-blocks truevolume efficiency start "When run with  set advanced g权限"下有参数。这不会运行重复数据删除、而是仅对AFS中不再存在的仅快照块进行数据压缩。

示例:

  1. 文件或块已写入卷
  2. 未应用实时效率
    • 未配置实时FAS
    • 写入工作负载较高时的AFF (实时是最佳选择)
  3. 已写入块在卷效率更改日志中进行跟踪、以便在下一个效率后台作业中进行提取
  4. 尚未触发后台效率作业计划
  5. snap1 已创建Snapshot
  6. 文件或块写入1。已从AFS中删除、因此 snap1 仅会滞留在Snapshot中
  7. 后台效率计划触发器
  8. 在1中写入的文件或块会保留在WAFLsnap1()中,而不会应用重复数据删除,直到 snap1 删除Snapshot为止
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