Ext4
Ext4 is a widely deployed Linux filesystem and a recurring compatibility/performance baseline in this corpus; it represents a concrete implementation, not the generic behavior of all local filesystems.
是什么
Ext4 supplies POSIX filesystem semantics over block devices with metadata, allocation, journaling, and page-cache integration. Systems compare against it when they change a data path, storage layout, or safety property while retaining a familiar Linux interface.
关键观察 / 隐含假设
- 观察：filesystem behavior is coupled to the kernel I/O stack and device. FS-PI-FAST26 uses Ext4-context evaluation when studying storage-path behavior.
- 观察：semantics and specification matter beyond throughput. SysSpec-FAST26 and CetoFS-FAST26 examine filesystem-level properties under explicit boundaries.
- 假设：an Ext4 result transfers to another filesystem. Allocation, journaling, cache state, mount options, and device geometry can invalidate that extrapolation.
演进时间线
- 2026 FAST：FS-PI-FAST26 — storage-path evaluation with a filesystem boundary.
- 2026 FAST：SysSpec-FAST26 — filesystem specification/behavior analysis.
- 2026 FAST：CetoFS-FAST26 — filesystem system design and evaluation.
相关概念
相关论文
- FS-PI-FAST26 — filesystem and storage-path evaluation.
- SysSpec-FAST26 — specification and semantic analysis.
- CetoFS-FAST26 — filesystem-system design.