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使用SnapMirror会对性能产生影响

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适用场景

  • ONTAP 9
  • SnapMirror

问题描述

  • 在“磁盘”/“磁盘 io”和/或“数据”延迟中心 (D-blade) 上可以看到延迟增加qos statistics由于活动SnapMirror传输而产生的输出
  • 此外、可能还会  发现CPU活动/利用率较高
  • 注意:由于SnapMirror传输是 CPU 上的后台进程,因此数据延迟很少发生

示例:以下命令显示SnapMirror传输过程中磁盘延迟或数据延迟较高:

nas1::> qos statistics volume latency show -volume data -vserver data_svm3
Workload            ID    Latency    Network    Cluster      Data       Disk        QoS
--------------- ------ ---------- ---------- ---------- ---------- ---------- ---------
-total-              -     0.00us     0.00us    0.00us   000.00us        0ms        0ms
data-wid307        307   300.00ms     0.00us       0ms   150.00ms   150.00ms        0ms
-total-              -     0.00us     0.00us    0.00us   000.00us        0ms        0ms
data-wid307        307   892.00ms     0.00us       0ms    92.00ms   800.00ms        0ms
-total-              -     0.00us     0.00us    0.00us   000.00us        0ms        0ms
data-wid307        307   125.00ms     0.00us       0ms    25.00ms   100.00ms        0ms
-total-              -     0.00us     0.00us    0.00us   000.00us        0ms        0ms
data-wid307        307   332.00ms     0.00us       0ms   300.00ms    32.00ms        0ms

CLUSTERB::> snapmirror show
                                                   Progress
Source            Destination   Mirror     Relationship    Total          Last
Path        Type   Path       State      Status       Progress   Healthy   Updated
-----------     ----    ------------   -------     --------------   ---------  -------   --------
svmprod:volprod   XDP    svmdr:voldr   Snapmirrored  Transferring    27GB     false    07/08 11:01:52

  • 如果 SnapMirror 是主要任务,作为部分迁移活动,并且迁移率较低且吞吐量很低

 

 

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