Very slow ndmp-restore from tape over fc-ports
Applies to
- ONTAP 9
- Network Data Management Protocol (NDMP)
Issue
- ndmp-restore performance from tape over fc-ports to a node is very slow; other nodes are showing normal restore speed
- From
Backup Logs, restore does not seem to progress to phase 3
rst Wed Mar 1 14:41:14 CET 2023 /node/volume/ Log_msg (Total P2 threads (3))
rst Wed Mar 1 14:41:14 CET 2023 /node/volume/ Log_msg (P2 thread 0: time (sec) ( 0), dirs processed ( 0))
rst Wed Mar 1 14:41:14 CET 2023 /node/volume/ Log_msg (P2 thread 1: time (sec) ( 0), dirs processed ( 1))
rst Wed Mar 1 14:41:14 CET 2023 /node/volume/ Log_msg (P2 thread 2: time (sec) ( 0), dirs processed ( 0))
rst Wed Mar 1 14:41:14 CET 2023 /node/volume/ Log_msg (VM clrimap : wait_time (sec) ( 0), lookup_time (sec) ( 0))
rst Wed Mar 1 14:41:14 CET 2023 /node/volume/ Log_msg (VM dumpmap : wait_time (sec) ( 0), lookup_time (sec) ( 0))
rst Wed Mar 1 14:41:14 CET 2023 /node/volume/ Log_msg (VM inomap : wait_time (sec) ( 0), lookup_time (sec) ( 0))
rst Wed Mar 1 14:41:14 CET 2023 /node/volume/ Log_msg (VM inomap : Cache hits ( 39), Cache misses ( 2))
rst Wed Mar 1 14:41:14 CET 2023 /node/volume/ Log_msg (VM basemap : wait_time (sec) ( 0), lookup_time (sec) ( 0))
rst Wed Mar 1 14:41:14 CET 2023 /node/volume/ Log_msg (VM filemap : wait_time (sec) ( 0), lookup_time (sec) ( 0))
rst Wed Mar 1 14:41:14 CET 2023 /node/volume/ Log_msg (VM dirmap : wait_time (sec) ( 0), lookup_time (sec) ( 0))
rst Wed Mar 1 14:41:14 CET 2023 /node/volume/ Log_msg (VM inotab : wait_time (sec) ( 0), lookup_time (sec) ( 0))
rst Wed Mar 1 14:41:14 CET 2023 /node/volume/ Log_msg (Phase 1 percent spent in reading from media: 0%
) /node/volume/
rst Wed Mar 1 14:41:14 CET 2023 /node/volume/ Log_msg (Phase 1 total time (sec): 2
) /node/volume/
rst Wed Mar 1 14:41:14 CET 2023 /node/volume/ Log_msg (Phase 2 total time (sec): 0
) /node/volume/
rst Wed Mar 1 14:41:14 CET 2023 /node/volume/ Tape_close (ndmp)
rst Wed Mar 1 14:41:14 CET 2023 /node/volume/ Abort (5 files, 2424 MB, 1755 secs, 1 MBps)
/node/volume/
rst Thu Mar 2 16:04:45 CET 2023 /node/volume/ Error (job aborted