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Flash Cacheの障害が原因で複数のアグリゲートにCPSが長くなる

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Category:
ontap-9
Specialty:
perf<a>2009362420</a><a>for_translation</a>
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環境

  • ONTAP 9
  • NVMeベースのFlash Cacheを搭載したAll FASシステム

問題

  • 複数のアグリゲート で CPが長くなる:
Mon Nov 21 18:55:17 CST [AI-A: wafl_exempt08: wafl.cp.toolong:error]: Aggregate SATA_03 experienced a long CP.
Mon Nov 21 18:57:32 CST [AI-A: wafl_exempt11: wafl.cp.toolong:error]: Aggregate SATA_02 experienced a long CP.
Mon Nov 21 18:58:43 CST [AI-A: wafl_exempt03: wafl.cp.toolong:error]: Aggregate SATA_01 experienced a long CP.
  • 外部 キャッシュは、次のエラーを書き込みます。
Tue Nov 08 02:00:11 CST [AI-A: wafl_exempt07: ems.engine.suppressed:debug]: Event 'extCache.io.writeError' suppressed 77 times in last 457317 seconds.
Tue Nov 08 02:00:11 CST [AI-A: wafl_exempt07: extCache.io.writeError:notice]: WAFL external cache I/O write error: Insertq_save: unable to alloc context chain, code 0
  • カードのステータスは  sysconfig -a 出力の障害です。
slot 3: Flash Cache NVMe
Serial Number:    S3K6NX0M200744
Part Number:     119-00329
Hardware Revision:  A0
Firmware Version:  NA01
Model Name:     X3311A
Capacity:      1024 GB
Vendor Name:     Samsung
State:        failed
  • 高レイテンシは観察されません。

 

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