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长一致点( WAFL.cp.toolong )是否正常?

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144
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Public
Votes:
3
Category:
ontap-9
Specialty:
perf<a>wafl.cp.toolong</a><a>cp</a>
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适用场景

  • ONTAP 9
  • Data ONTAP 7-模式

问题解答

  • 如果不影响性能,则为是,则偶尔出现的长一致点( CP )正常且是预期的
  • 建议检查延迟是否高于预期
  • 有时, CP 时间较长会频繁发生,如果无法确定发生原因,可以创建案例进行进一步调查

追加信息

  • ONTAP 可以在 CP 中执行多个后台任务,并使用较长的 CP 时间:
  • 如果 ONTAP 的空闲时间较长,则较长的 CP 会为后台工作或写入突发提供更多优先级
  • CP 会异步执行写入路径
    • 写入操作在写入本地节点和配对节点上的 NVRAM 时会得到确认
    • 延迟不受影响,因为在 CP 完成之前可以缓冲写入
    • 这意味着,由于写入工作负载较低,数据在 RAM 中停留 30 秒或更长时间不会影响延迟
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