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LUN のレイテンシが高くなっているため、バックアップに時間がかかります

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Category:
ontap-9
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san
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環境

  • SAN
  • ONTAP 9
  • Red Hat Enterprise Linux ( RHEL ) 6.7

問題

  • LUN のレイテンシは、バックアップ中はピークが 50 ミリ秒と表示されます。
  • 一方のノードのボリューム / LUN にはパートナーノードからアクセスします

clipboard_e67be68a54902778558aa27044ee57a60.png

  • multipath -ll Linux ホストからは、ハードウェアハンドラの場合は「 0 」が表示され 優先度別にパスはグループ化されません

[root@linux ~]# multipath -ll
mpathaf (3600a09803831457544245248xxxxxxxx) dm-8 NETAPP,LUN C-Mode
size=500G features='0' hwhandler='0' wp=rw
|-+- policy='round-robin 0' prio=1 status=active
| `- 12:0:0:8 sdh  8:112  active ready running
|-+- policy='round-robin 0' prio=1 status=enabled
| `- 12:0:1:8 sdo  8:224  active ready running
|-+- policy='round-robin 0' prio=1 status=enabled
| `- 12:0:2:8 sdv  65:80  active ready running
`-+- policy='round-robin 0' prio=1 status=enabled
  `- 12:0:3:8 sdac 65:192 active ready running

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