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如果不使用-o选项重新分配start、则重新分配将处于"重复"状态

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core<a>Data ONTAP 8.1 7-模式</a><a>1018239</a><a>用于翻译</a>
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适用场景

Data ONTAP 8.1 7-模式

问题描述

处于 repeat 状态的重新分配作业每天在后台运行、不会发出任何通知、它会导致CPU和其他系统资源开销、从而导致性能意外下降。这可以在中确认 Perfstat。对于聚合重新分配(可用空间重新分配), block reallocation 可以在中看到一个名为的扫描程序 wafl scan status -A

示例:

Aggregate aggr_sata1:
Scan id                   Type of scan     progress
       1                 HyA Hit Update     pvbn 17423333887 (ssd block 61964287 of 146113152) 959066 bits set
      34    active bitmap rearrangement     fbn 242925 of 536381 w/ max_chain_len 20
      47      hybrid aggregate eviction     pvbn 17485602133 (DBN 2471574 of 24352192)
     771             block reallocation     block 1249491968 of 1326454656 (94%)

wafl scan status 对于卷重新分配(已用空间重新分配)、也会从中看到类似的内容。中的另一个现象 perfstat 是磁盘读/写吞吐量可能比用户协议读/写吞吐量高得多、而没有任何内部工作负载来解释这种差距(未对齐的I/O、碎片化、数据保护和重复数据删除/数据压缩可能会造成这种差距)。

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