UnionFS
E276991
UnionFS is a union file system that allows multiple directories or file systems to be transparently overlaid into a single coherent filesystem view, commonly used for layered container images.
All labels observed (3)
How this entity was disambiguated
This entity first appeared as the object of triple T2555553 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: UnionFS Context triple: [Docker, supportsTechnology, UnionFS]
-
A.
JFS
JFS (Journaled File System) is a high-performance journaling file system developed by IBM, known for its scalability, low CPU usage, and reliability on enterprise and Linux systems.
-
B.
FUSE (Filesystem in Userspace)
FUSE (Filesystem in Userspace) is a Linux kernel interface and accompanying user-space library that allows non-privileged users to create and run custom filesystems without modifying kernel code.
-
C.
XFS
XFS is a high-performance 64-bit journaling file system originally developed by SGI, widely used on Linux for handling large files and parallel I/O workloads.
-
D.
ReiserFS
ReiserFS is a journaling file system for Linux known for its efficient handling of small files and advanced tree-based storage structures.
-
E.
F2FS
F2FS (Flash-Friendly File System) is a Linux file system optimized for NAND flash-based storage devices, designed to improve performance and lifespan on solid-state media.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: UnionFS Target entity description: UnionFS is a union file system that allows multiple directories or file systems to be transparently overlaid into a single coherent filesystem view, commonly used for layered container images.
-
A.
JFS
JFS (Journaled File System) is a high-performance journaling file system developed by IBM, known for its scalability, low CPU usage, and reliability on enterprise and Linux systems.
-
B.
FUSE (Filesystem in Userspace)
FUSE (Filesystem in Userspace) is a Linux kernel interface and accompanying user-space library that allows non-privileged users to create and run custom filesystems without modifying kernel code.
-
C.
XFS
XFS is a high-performance 64-bit journaling file system originally developed by SGI, widely used on Linux for handling large files and parallel I/O workloads.
-
D.
ReiserFS
ReiserFS is a journaling file system for Linux known for its efficient handling of small files and advanced tree-based storage structures.
-
E.
F2FS
F2FS (Flash-Friendly File System) is a Linux file system optimized for NAND flash-based storage devices, designed to improve performance and lifespan on solid-state media.
- F. None of above. chosen
Statements (50)
| Predicate | Object |
|---|---|
| instanceOf |
file system
ⓘ
free and open-source software ⓘ union file system ⓘ |
| designedFor |
layered filesystems
ⓘ
read-only media with writable overlay ⓘ |
| developedFor |
Linux kernel
ⓘ
surface form:
Linux kernel 2.4 series
Linux kernel ⓘ
surface form:
Linux kernel 2.6 series
|
| handlesOperation |
copy-up of modified files
ⓘ
file creation across branches ⓘ file deletion across branches ⓘ file renaming across branches ⓘ |
| hasAlternative |
UnionFS
self-linksurface differs
ⓘ
surface form:
OverlayFS
aufs ⓘ overlay2 storage driver in Docker ⓘ |
| hasLimitation |
complexity in kernel maintenance
ⓘ
performance overhead compared to native filesystems ⓘ |
| implementsConcept |
stackable file system
ⓘ
union mount ⓘ |
| influenced |
UnionFS
self-linksurface differs
ⓘ
surface form:
OverlayFS
aufs ⓘ |
| isPredecessorOf |
UnionFS
self-linksurface differs
ⓘ
surface form:
OverlayFS
aufs ⓘ |
| license | GNU General Public License ⓘ |
| mountOption |
cow
ⓘ
delete ⓘ dirs= ⓘ ro ⓘ rw ⓘ wh ⓘ |
| runsIn | Linux kernel ⓘ |
| storesMetadata | whiteout files ⓘ |
| supportsFeature |
branch priority
ⓘ
copy-on-write semantics ⓘ dynamic addition of branches ⓘ dynamic removal of branches ⓘ overlaying multiple directories ⓘ overlaying multiple file systems ⓘ read-only lower layers ⓘ single unified filesystem view ⓘ whiteouts for deletions ⓘ writable upper layer ⓘ |
| supportsOperatingSystem | Linux ⓘ |
| useCase |
chroot environments
ⓘ
container images ⓘ diskless systems ⓘ live CD environments ⓘ snapshot-like views of filesystems ⓘ software appliances ⓘ |
| usedBy |
early Linux live distributions
ⓘ
some container and virtualization tools (historically) ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: UnionFS Description of subject: UnionFS is a union file system that allows multiple directories or file systems to be transparently overlaid into a single coherent filesystem view, commonly used for layered container images.
Referenced by (6)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
OverlayFS
this entity surface form:
AUFS
this entity surface form:
OverlayFS
this entity surface form:
OverlayFS
this entity surface form:
OverlayFS