Analysis of file system space utilization patterns in UNIX based volumes

Ullah, Mazz; Ahsan, Faraz; Ahmad, Imran Shafiq; Ishaq, Ahmad

doi:10.1109/icet.2005.1558939

Cited by 2 publications

(4 citation statements)

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“…The median size is 2 MB and it confirms that most files are small but most bytes are in large files. Ullah, et al [16] have results about 1 to 10 KB the value observed is up to 32% of the total occurrences. There are 29% values in the range of 10 KB to 100 KB.…”

Section: File Systems Statistics and Analysismentioning

confidence: 88%

“…30% of file systems have fewer than 4k files. Ullah, et al [16] found that 67% of the occurrences are found in the range of 1-8 number of files in a directory. The percentage of the 9-16 files in a directory comprises of 15% of the total data found.…”

Section: File Systems Statistics and Analysismentioning

confidence: 99%

“…And virtual hard drives are consuming a rapidly increasing fraction of file-system space. Ullah, et al [16] discovered that the file name length falls in the range from 9 to 17 characters. The peak occurs for file names with length of 12 characters.…”

Section: File Systems Statistics and Analysismentioning

confidence: 99%

“…Douceur, et al [12] shared that 28% of all file systems contain 512 to 1023 directories, and 29% of file systems have fewer than 256 directories. Ullah, et al [16] shared that 59% of the directories have sub-directories in the range of 1-5, 35% occurrences are found in the range of 6-10. But the results show that only 6% occurrences are found in the range of above 10 sub-directories in a directory.…”

Section: File Systems Statistics and Analysismentioning

confidence: 99%

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SSDFS: Towards LFS Flash-Friendly File System without GC operation

Dubeyko

2019

Preprint

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Solid state drives have a number of interesting characteristics. However, there are numerous file system and storage design issues for SSDs that impact the performance and device endurance. Many flash-oriented and flash-friendly file systems introduce significant write amplification issue and GC overhead that results in shorter SSD lifetime and necessity to use the NAND flash overprovisioning. SSDFS file system introduces several authentic concepts and mechanisms: logical segment, logical extent, segment's PEBs pool, Main/Diff/Journal areas in the PEB's log, Diff-On-Write approach, PEBs migration scheme, hot/warm data self-migration, segment bitmap, hybrid b-tree, shared dictionary b-tree, shared extents b-tree. Combination of all suggested concepts are able: (1) manage write amplification in smart way, (2) decrease GC overhead, (3) prolong SSD lifetime, and (4) provide predictable file system's performance.

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Section: File Systems Statistics and Analysismentioning

confidence: 88%

Section: File Systems Statistics and Analysismentioning

confidence: 99%

Section: File Systems Statistics and Analysismentioning

confidence: 99%

Section: File Systems Statistics and Analysismentioning

confidence: 99%

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