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非常に低速な"rm-rf"パフォーマンス

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Category:
ontap-9
Specialty:
perf
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環境

  • ONTAP 9
  • NFS
  • FabricPool
  • FlexCache

問題

  • rm -rf * クライアントから非常に遅い
  •  Avg SRTREMOVE クライアントとストレージの両方のコールでtcpdumpがhighと表示される

===========================================================================
ONC-RPC Service Response Time Statistics - 2009779106.nodename.trc:
Index  Procedure  Calls  Min SRT (s)  Max SRT (s)  Avg SRT (s)  Sum SRT (s)
---------------------------------------------------------------------------
NFS Version 3
ACCESS      4   217    0.000041    0.001538    0.000220    0.047819
GETATTR      1   534    0.000043    0.002227    0.000223    0.118914
LOOKUP      3   3710    0.000056    0.015549    0.000718    2.662431
READDIR     16    42    0.000070    0.001054    0.000295    0.012392
READDIRPLUS   17   366    0.000098    0.211175    0.017263    6.318126
REMOVE     12  15832    0.000213    6.917006   0.190092 3009.528768
RMDIR      13   215    0.000189    0.385931    0.080173   17.237143
NFS Version 3
---------------------------------------------------------------------------

  • ボリュームがFabricPoolに階層化され、複数のデスティネーションで構成されるFlexCacheの元のボリューム
  • FabricPoolによるレイテンシなし

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