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NDMP リストアのパフォーマンスが非常に遅い

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Category:
ndmp
Specialty:
dp
Last Updated:

環境

  • ONTAP 9
  • 3 ウェイ NDMP
  • リストア
  • NetWorker

問題

NDMP ログに PAUSED は、テープからデータを読み取るための一定の状態が示されます

 Sun Jul 25 2021 05:21:54 +02:00 [kern_ndmpd:info:5516] [31524] INFO: DATA read at offset 1788662062080 with length 131072 Sun Jul 25 2021 05:21:55 +02:00 [kern_ndmpd:info:5516] [31524] INFO: DATA notification state 3 (SESS_STATE: PAUSED) event 8 (EVENT: SEEK) Sun Jul 25 2021 05:21:55 +02:00 [kern_ndmpd:info:5516] [31524] INFO: DATA read at offset 1793047803904 with length 65536 Sun Jul 25 2021 05:21:56 +02:00 [kern_ndmpd:info:5516] [31524] INFO: DATA notification state 3 (SESS_STATE: PAUSED) event 8 (EVENT: SEEK) Sun Jul 25 2021 05:21:56 +02:00 [kern_ndmpd:info:5516] [31524] INFO: DATA read at offset 1793047869440 with length 131072 Sun Jul 25 2021 05:21:56 +02:00 [kern_ndmpd:info:5516] [31524] INFO: DATA notification state 3 (SESS_STATE: PAUSED) event 8 (EVENT: SEEK)

リストア中にテープから inode ファイル情報を取得するには時間がかかります。

 rst Tue Jul 27 12:26:38 CEST 202 /svm_cifs_sl3/vol_cifs_sl3_backup/ Tape_close (ndmp) rst Tue Jul 27 12:26:38 CEST 202 /svm_cifs_sl3/vol_cifs_sl3_backup/ End (250 files, 2006 MB) rst Tue Jul 27 12:31:59 CEST 202 /svm_cifs_sl3/vol_cifs_sl3_backup/ Start (Level 0, NDMP:95915) rst Tue Jul 27 12:31:59 CEST 202 /svm_cifs_sl3/vol_cifs_sl3_backup/ Options (b=0, d, y, H, TCP recv buffer size = 33580, TCP send buffer size = 33580) rst Tue Jul 27 12:31:59 CEST 202 /svm_cifs_sl3/vol_cifs_sl3_backup/ Tape_open (ndmp) rst Tue Jul 27 14:49:07 CEST 202 /svm_cifs_sl3/vol_cifs_sl3_backup/ Log_msg (Total P2 threads (3)) rst Tue Jul 27 14:49:07 CEST 202 /svm_cifs_sl3/vol_cifs_sl3_backup/ Log_msg (P2 thread 0: time (msec) ( 6), dirs processed ( 0)) rst Tue Jul 27 14:49:07 CEST 202 /svm_cifs_sl3/vol_cifs_sl3_backup/ Log_msg (P2 thread 1: time (msec) ( 0), dirs processed ( 0)) rst Tue Jul 27 14:49:07 CEST 202 /svm_cifs_sl3/vol_cifs_sl3_backup/ Log_msg (P2 thread 2: time (msec) ( 0), dirs processed ( 0)) rst Tue Jul 27 14:49:07 CEST 202 /svm_cifs_sl3/vol_cifs_sl3_backup/ Log_msg (VM clrimap : wait_time (msec) ( 0), lookup_time (msec) ( 2290)) rst Tue Jul 27 14:49:07 CEST 202 /svm_cifs_sl3/vol_cifs_sl3_backup/ Log_msg (VM dumpmap : wait_time (msec) ( 310), lookup_time (msec) ( 6170)) rst Tue Jul 27 14:49:07 CEST 202 /svm_cifs_sl3/vol_cifs_sl3_backup/ Log_msg (VM inomap : wait_time (msec) ( 309), lookup_time (msec) ( 3078748)) rst Tue Jul 27 14:49:07 CEST 202 /svm_cifs_sl3/vol_cifs_sl3_backup/ Log_msg (VM inomap : Cache hits ( 6983253), Cache misses ( 677340)) rst Tue Jul 27 14:49:07 CEST 202 /svm_cifs_sl3/vol_cifs_sl3_backup/ Log_msg (VM basemap : wait_time (msec) ( 0), lookup_time (msec) ( 0)) rst Tue Jul 27 14:49:07 CEST 202 /svm_cifs_sl3/vol_cifs_sl3_backup/ Log_msg (VM filemap : wait_time (msec) ( 38), lookup_time (msec) ( 8440)) rst Tue Jul 27 14:49:07 CEST 202 /svm_cifs_sl3/vol_cifs_sl3_backup/ Log_msg (VM dirmap : wait_time (msec) ( 37), lookup_time (msec) ( 62875)) rst Tue Jul 27 14:49:07 CEST 202 /svm_cifs_sl3/vol_cifs_sl3_backup/ Log_msg (VM inotab : wait_time (msec) ( 25), lookup_time (msec) ( 39916)) rst Tue Jul 27 14:49:07 CEST 202 /svm_cifs_sl3/vol_cifs_sl3_backup/ Log_msg (Phase 1 percent spent in reading from media: 0% ) rst Tue Jul 27 14:49:07 CEST 202 /svm_cifs_sl3/vol_cifs_sl3_backup/ Log_msg (Phase 1 total time (msec): 7604422 ) rst Tue Jul 27 14:49:07 CEST 202 /svm_cifs_sl3/vol_cifs_sl3_backup/ Log_msg (Phase 2 total time (msec): 2237 ) rst Tue Jul 27 14:49:07 CEST 202 /svm_cifs_sl3/vol_cifs_sl3_backup/ Log_msg (Phase 3 percent spent in reading from media: 0% ) rst Tue Jul 27 14:49:07 CEST 202 /svm_cifs_sl3/vol_cifs_sl3_backup/ Log_msg (Phase 3 total time (msec): 620921 

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