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Data ONTAP 中的卷自动调整是什么?

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适用于

ONTAP 9

回答

卷自动调整大小的作用是什么?
  • 卷自动调整大小是 ONTAP 中基于策略的空间管理功能,如果卷接近满,则允许卷以增量方式增长
  • 接近满的阈值由标志 wafl_reclaim_threshold 定义
  • 当写入发送到节点的数据大于可用空间时,ONTAP 将尝试尽可能多地写入,然后使用  volume full 消息使写入失败
    • 在下一次检查期间,卷将以增量方式增长,直到达到最小可用空间阈值
    • 这意味着 autosize 最好被描述为"使用时增长",而不是"按需增长",在规划阈值和增长增量时应记住这一区别
  • 请注意,卷自动调整大小不会无限增加卷。
    • 该卷将增长,直到达到最大 autosize 值,然后将不再分配更多空间
  • grow 和 grow_shrink 模式与 Snapshot 自动删除一起工作,以便在卷即将满时自动回收空间;卷参数 -space-mgmt-try-first 控制尝试这两种空间回收策略的顺序
Autosize 命令语法

 

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