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如何禁用聚合空空间重新分配?

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ontap-9
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适用场景

  • ONTAP 9
  • 聚合FreeSpace重新分配(free-space-realloc)/连续区块清理(CSC)

问题描述

  • 聚合FreeSpace重新分配(有时也称为连续区块清理(Continuous segment Cleaning、CSC))是一个聚合标志:

::> aggr show -fields free-space-realloc
aggregate free-space-realloc
--------- ------------------
aggr0     off

  • 如果设置为除以外的任何内容 off、则ONTAP 将继续在后台对聚合中未使用的块进行重新分组
  • 默认情况 off 下、此标志设置为、并且只能手动启用。
  • 只有在使用基于HDD的聚合的非常特定的边缘情形下、才会修改此标志、以短期缓解性能余量瓶颈。此类瓶颈应通过额外驱动器等增加性能余量来长期缓解
  • 翻转标记通常由NetApp客户支持人员指导。有关 分段和重新分配 更多详细信息、请参见碎片整理和重新分配。
  • 在AFF 平台或纯SSD聚合上、预计不会启用CSC。

 

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