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ボリュームのレイテンシが高く、アプリケーションが停止しています

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Category:
ontap-9
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san
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環境

  • ONTAP
  • SAN
  • FCP

問題

  • ボリュームの高レイテンシ(110ミリ秒超)とアプリケーションの停止:

::*> qos statistics volume latency show 
Workload       ID   Latency   Network   Cluster     Data     Disk     QoS    NVRAM    Cloud  FlexCache   SM Sync
--------------- ------ ---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- ----------
-total-        -   55.36ms   45.75ms    6.00us   926.00us    8.67ms     0ms    5.00us     0ms     0ms     0ms
my_lun_..     25247   125.04ms  124.59ms    1.00us   279.00us   170.00us     0ms     0ms     0ms     0ms     0ms
my_lun__..     23052   108.73ms  108.19ms   5.00us   218.00us   318.00us     0ms     0ms     0ms     0ms     0ms

  • EMS は特定のデバイス40A00から次のエラーを表示します。
Tue Mar 08 01:02:01 +0100 [NETAPP: fct_tpd_work_thread_0: fcp.io.status:debug]: STIO Adapter:1b IO WQE failure, Handle 0x1, Type 8, S_ID: 40A00, VPI: 275, OX_ID: 6E8, Status 0x3 Ext_Status 0x1d  
Tue Mar 08 01:03:21 +0100 [NETAPP: fct_tpd_work_thread_0: fcp.io.status:debug]: STIO Adapter:1b IO WQE failure, Handle 0x1, Type 8, S_ID: 40A00, VPI: 275, OX_ID: 543, Status 0x3 Ext_Status 0x1d   

 
 
  • sfpshow エラーのあるデバイスが接続されているスイッチポートで、受信した光パワー(RX)が非常に低いことを示します。

switch# switchshow

Index Slot Port Address Media  Speed     State   Proto
============================================================
  14   1   14  040a00  id   N8  Online   FC  F-Port  51:40:2e:c0:xx:xx:xx:xx 

switch# sfpshow 1/14

=============
Slot  1/Port 14:
============= 
RX Power:   -26.0  dBm (2.5  uW) 
TX Power:   -3.3   dBm (467.5 uW) 

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