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ext4: Yes Yes Yes Yes Yes No Yes [l] Yes [l] Yes ... Level 2 & 3: ~ 180 Depends on Level [cr] ... 2 GiB (2.147 GB) ? ZFS: 255 bytes
Bcachefs is a copy-on-write (COW) file system for Linux-based operating systems. [3] Features include caching, [4] full file-system encryption using the ChaCha20 and Poly1305 algorithms, [5] native compression [4] via LZ4, gzip [6] and Zstandard, [7] snapshots, [4] CRC-32C and 64-bit checksumming. [3] It can span block devices, including in ...
[2] In order to resist fragmentation, several extent-based file systems do allocate-on-flush. Many modern fault-tolerant file systems also do copy-on-write, although that increases fragmentation. As a similar design, the CP/M file system uses extents as well, but those do not correspond to the definition given above.
ext4 (fourth extended filesystem) is a journaling file system for Linux, developed as the successor to ext3.. ext4 was initially a series of backward-compatible extensions to ext3, many of them originally developed by Cluster File Systems for the Lustre file system between 2003 and 2006, meant to extend storage limits and add other performance improvements. [4]
ZFS (previously Zettabyte File System) is a file system with volume management capabilities. It began as part of the Sun Microsystems Solaris operating system in 2001. Large parts of Solaris, including ZFS, were published under an open source license as OpenSolaris for around 5 years from 2005 before being placed under a closed source license when Oracle Corporation acquired Sun in 2009–2010.
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