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DBMSes often use their own block I/O for improved performance and recoverability as compared to layering the DBMS on top of a file system. On Linux the default block size for most file systems is 4096 bytes. The stat command part of GNU Core Utilities can be used to check the block size. In Rust a block can be read with the read_exact method. [6]
bzip2 is a free and open-source file compression program that uses the Burrows–Wheeler algorithm.It only compresses single files and is not a file archiver.It relies on separate external utilities such as tar for tasks such as handling multiple files, and other tools for encryption, and archive splitting.
gzip is a file format and a software application used for file compression and decompression.The program was created by Jean-loup Gailly and Mark Adler as a free software replacement for the compress program used in early Unix systems, and intended for use by GNU (from which the "g" of gzip is derived).
Within compressed blocks, if a duplicate series of bytes is spotted (a repeated string), then a back-reference is inserted, linking to the previous location of that identical string instead. An encoded match to an earlier string consists of an 8-bit length (3–258 bytes) and a 15-bit distance (1–32,768 bytes) to the beginning of the duplicate.
A File Control Block (FCB) is a file system structure in which the state of an open file is maintained. A FCB is managed by the operating system, but it resides in the memory of the program that uses the file, not in operating system memory.
At the time the file system is mounted, the handler is registered with the kernel. If a user now issues read/write/stat requests for this newly mounted file system, the kernel forwards these IO-requests to the handler and then sends the handler's response back to the user. Unmounting a FUSE-based file system with the fusermount command
In the file system used in Version 6 Unix, an inode contains eight pointers: [1] 8 direct pointer that directly point to blocks of a file with eight or fewer blocks; 8 singly indirect pointers (pointing to a block of direct pointers) for files with more than eight blocks. In the file system used in Version 7 Unix, an inode contains thirteen ...
This is a comparison of binary executable file formats which, once loaded by a suitable executable loader, can be directly executed by the CPU rather than being interpreted by software. In addition to the binary application code, the executables may contain headers and tables with relocation and fixup information as well as various kinds of ...