Commits
100
Nodes
20
dir edges
14
co_change edges
70
Hub shadows
5
Universal hubs
1
Cross-layer hub correlation
directory_coupling ↔ co_change
r = -0.2459
weak negative hub persistence — layers show partially independent structure
not significant
Hub shadows (5)
Files with a large gap between directory rank (declared) and co-change rank (behavioral).
storage/ndb/src/common/transporter/SHM_Transporter.cpp
2 commits
dir rank
#3
→
co_change rank
#18
gap
15
storage/ndb/src/common/transporter/SHM_Transporter.unix.cpp
2 commits
dir rank
#4
→
co_change rank
#19
gap
15
storage/ndb/src/common/util/ndbxfrm_file.cpp
9 commits
dir rank
#15
→
co_change rank
#1
gap
14
storage/ndb/src/common/transporter/TransporterRegistry.cpp
4 commits
dir rank
#1
→
co_change rank
#15
gap
14
storage/ndb/src/common/transporter/Transporter.cpp
3 commits
dir rank
#2
→
co_change rank
#16
gap
14
Universal hubs (1)
High in both layers — architectural backbone.
Backup.cpp
storage/ndb/src/kernel/blocks/backup/Backup.cpp
Hub ranking (20 nodes)
| # | File | hub score | commits | archetype |
|---|---|---|---|---|
| 1 | Backup.cpp | 0.7895 | 7 | universal_hub |
| 2 | ndbxfrm_file.cpp | 0.6842 | 9 | hub_shadow |
| 3 | consumer_restore.cpp | 0.4737 | 7 | |
| 4 | restore_main.cpp | 0.4737 | 6 | |
| 5 | BackupProxy.cpp | 0.4737 | 3 | |
| 6 | Restore.cpp | 0.4737 | 3 | |
| 7 | BackupInit.cpp | 0.4737 | 3 | |
| 8 | AsyncFile.cpp | 0.4211 | 4 | |
| 9 | Ndbfs.cpp | 0.4211 | 4 | |
| 10 | TransporterRegistry.cpp | 0.4211 | 4 | hub_shadow |
| 11 | ndb_file_posix.cpp | 0.4211 | 3 | |
| 12 | ndb_file_win32.cpp | 0.4211 | 3 | |
| 13 | Transporter.cpp | 0.4211 | 3 | hub_shadow |
| 14 | SHM_Transporter.cpp | 0.4211 | 2 | hub_shadow |
| 15 | SHM_Transporter.unix.cpp | 0.4211 | 2 | hub_shadow |
| 16 | BackupImpl.cpp | 0.3684 | 3 | |
| 17 | CommandInterpreter.cpp | 0.3684 | 3 | |
| 18 | ndbd_exit_codes.cpp | 0.3684 | 3 | |
| 19 | IPCConfig.cpp | 0.2632 | 2 | |
| 20 | TransporterFacade.cpp | 0.2632 | 2 |