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什么是 IOPS ?

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ontap-9
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适用场景

所有存储系统

问题解答

 
在 ONTAP 9 中,不同操作大小的性能特征是什么?
  • 随机 IOPS 将占用更多 CPU ,并且延迟可能比顺序 IOPS 高
    • 随机 IOPS 块不会从磁盘中以任何顺序读取,例如块 3 , 12 , 66 , 1 , 等
    • 顺序 IOPS 块按磁盘顺序读取,例如块 1 , 2 , 3 , 4 , 等
  • 操作规模越小,通常需要进行更多计算
    • 在上述 1 MB 文件示例中, ONTAP 必须转到磁盘 256 次,并以 4 KB 的速率处理 256 个操作,而在 64 KB 的速率下仅处理 16 个操作
  • ONTAP 可以处理超过 64 KB 的正常容量,但由于操作大小的规范化,延迟可能会略高
    • 与 Data ONTAP 8 相比,在较新版本的 ONTAP 9 中,此功能更好
    • 如果读取大小为 1 MB ,则会同时发出 16 个 64 KB 的 WAFL 请求

追加信息

以下文章列出了 NFS 和 CIFS 操作以及指向 Wikipedia SCSI 代码的链接: What operations are categorized under other IOPS in ONTAP ?

 

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