可使用以下过程确定是否需要为设备添加多个读高速缓存设备。
开始之前
转至 maintenance hardware show 确定哪些机箱和插槽包含读高速缓存设备。
hostname:analytics worksheets> select worksheet-000 hostname:analytics worksheet-000> dataset
hostname:analytics worksheet-000 dataset (uncommitted)> set name="io.utilization[disk=hostname/HDD 13]" name = io.utilization[disk=hostname/HDD 13] hostname:analytics worksheet-000 dataset (uncommitted)> commit
hostname:analytics worksheet-000> done hostname:analytics worksheets> done
hostname:> analytics datasets
hostname:analytics datasets> show Datasets: DATASET STATE INCORE ONDISK NAME dataset-000 active 1.27M 15.5M arc.accesses[hit/miss] dataset-001 active 517K 9.21M arc.accesses[hit/miss=metadata hits][L2ARC eligibility] ... dataset-021 active 290K 7.80M io.utilization[disk=hostname/HDD 13] hostname:analytics datasets>
在此示例中,数据集名称 io.utilization[disk=hostname/HDD 13] 对应于 dataset-021。
hostname:analytics datasets> select dataset-021
hostname:analytics dataset-021> read 600
当现有设备的利用率达到 90% 时,您可能需要添加多个读高速缓存设备。