Cloud Volumes ONTAP NVlog 传输瓶颈—解决指南
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适用场景
Cloud Volumes ONTAP （ CVO ）
问题描述
- 与内部FAS/AFA相比、Cloud Volumes ONTAP在架构上存在一些差异、这可能导致ONTAP的NVLogging组件成为性能瓶颈
- 这通常表现为写入延迟增加或写入吞吐量降低
- 可以通过
qos statistics volume latency show命令观察到这种情况、延迟显示在 NVRAM 列中：
Cluster::>qos statistics volume latency show
Workload ID Latency Network Cluster Data Disk QoS NVRAM
--------------- ------ ---------- ---------- ---------- ---------- --------- --------- ---------
-total- - 136.49ms 99.00us 70.00us 550.00us 153.00us 0ms 136.17ms
vserver1_vol1.. 4201 206.05ms 130.00us 0ms 407.88us 44.00us 0ms 205.88ms
vserver5_vol8.. 7704 177.54ms 351.00us 1.00us 834.00us 114.00us 0ms 176.33ms
-total- - 140.29ms 103.00us 75.00us 335.56us 174.00us 0ms 139.94ms
vserver1_vol1.. 4201 379.03ms 127.00us 0ms 234.73us 175.00us 0ms 378.73ms
vserver5_vol8.. 7704 253.02ms 309.00us 1.30us 820.00us 105.00us 0ms 251.37ms