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如何修改 Flash Pool 聚合的缓存策略

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ontap-9
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适用场景

  • ONTAP 9
  • Flashpool 聚合
  • Flash Cache

问题描述

  • Flash Pool 是一个包含 HDD 和 SDD RAID 组的聚合。
  • 由于 ONTAP 9.1 Flash Pool 和 Flash Cache 可以在同一聚合上协同工作
  • 缓存策略用于定义系统如何缓存Flash Pool聚合或Flash Cache中的卷数据。
  • 通常,默认设置是合适的,但在某些情况下,可能需要修改这些设置。 
  • 在更改缓存策略之前,请务必了解这些策略的工作原理。
    • 只有在对工作负载测试不同的缓存策略之后,才能修改卷的缓存策略
    • 在大多数情况auto 下、默认缓存策略是您可以使用的最佳缓存策略。
    •  配置错误的缓存策略会严重降低卷工作负载性能
      • 性能下降可能会随着时间的推移逐渐增加。
      • 如果已更改缓存策略的卷出现性能问题,则应将缓存策略返回到 auto 。

 

 

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