Slow NDMP backup speeds with certain volumes
Applies to
- ONTAP 9.9.1P15
- NDMP Backup
Issue
Slow NDMP backup speeds with certain volumes transferring data significantly slower than others.
BACKUP.GZ
dmp Thu May 22 08:39:37 KST 2025 /NAS/Vol1(1) Log_msg (To restore this filesystem, a total of 18865017468 KB space and 85860163 number of free inodes is required. For a data copy operation, ensure that the destination has sufficient space to perform the restore)
dmp Thu May 22 08:39:37 KST 2025 /NAS/Vol1(1) Phase_change (II)
dmp Thu May 22 08:40:07 KST 2025 /NAS/Vol1(1) Phase_change (III)
...
dmp Thu May 22 10:55:16 KST 2025 /NAS/Vol1(1) Log_msg (Write DIRNET for BKPID=6, type=3 interrupted while at waiting for max in flight. Error = Interrupted system call.)
dmp Thu May 22 10:55:16 KST 2025 /NAS/Vol1(1) Error (Write to socket failed)
dmp Thu May 22 10:55:16 KST 2025 /NAS/Vol1(1) Tape_close (ndmp)
dmp Thu May 22 10:55:16 KST 2025 /NAS/Vol1(1) Log_msg (Flush DIRNET called on error = 4.)
dmp Thu May 22 10:55:16 KST 2025 /NAS/Vol1(1) Abort (912MB, 8360 secs, 0MBps)
dmp Thu May 22 10:55:16 KST 2025 /NAS/Vol1(1) Error (DUMP IS ABORTED)
- The dump to null test shows normal speeds.
