A compressed read-only filesystem for Linux.
Cromfs is a compressed read-only filesystem for Linux. Cromfs is intended for permanently archiving gigabytes of big files that have a lot of redundancy. It is more aimed at heavy compression than at a light fingerprint.
- Data, inodes, directories and block lists are stored compressed
- Duplicate inodes, files and even duplicate file portions are detected and stored only once
- Especially suitable for gigabyte-class archives of thousands of nearly-identical megabyte-class files.
- Files are stored in solid blocks, meaning that parts of different files are compressed together for effective compression
- Most of inode types recognized by Linux are supported (see comparisons).
- The LZMA compression is used. In the general case, LZMA compresses better than gzip and bzip2.
- As with usual filesystems, the files on a cromfs volume can be accessed in arbitrary order; the waits to open a specific file are small, despite the files being semisolidly archived.
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What's New in version 188.8.131.52
- This release fixes a crashing bug in mkcromfs relating to storing decompressed temporary fblock files.