- ONTAP 9
- NDMP Restore (non-DAR, out-of-place)
- In-Direct Topology
- DMA: EMC Networker
- NDMP restore is very slow even though there are no errors in the DMA and the NetApp NDMP logs.
- Reviewing the
BACKUP.GZlogs, phases 1 and 2 are the bottleneck.
rst ... Log_msg (Phase 1 total time (sec): 117548
rst ... Log_msg (Phase 2 total time (sec): 245150
rst ... End (31578032 files, 1943817 MB processed, 357 MB skipped, 395910 secs, 4 MBps)
- The directory structure is dense (deeply nested up to 8-9 levels). The amount of time that we have spent in lookups of the inomap mapfile is very high.
rst ... Log_msg (VM inomap : wait_time (sec) (77353), lookup_time (sec) (303568))
rst ... Log_msg (VM dirmap : wait_time (sec) (113369), lookup_time (sec) (219604))