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YYFS: A File System for Efficient Handling of Lots of Tiny Files

YYFS addresses the challenges of managing an abundance of tiny files efficiently. It aims to optimize disk space utilization and performance while avoiding inode limitations. This innovative file system is designed to accommodate various workloads, including batch file operations and random access tasks.

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YYFS: A File System for Efficient Handling of Lots of Tiny Files

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  1. yyfs -A File System for Lots of Tiny Files Yi Jun, Yuzhe Liu

  2. Motivation • Motivating Applications • user tend to use the file file in a unusual way • Generally, the workload that dominated by many tiny files references that have the batch processing characters

  3. Problems • problems: • tradeoffs between performance and space efficiency; • I-node allocation problem • Problems exist in current G-P file system to solve these problems • Problems exist in existing specially-tailored file system to solve these problems

  4. Goal to be achieved • Achieve both high disk space utilization and performance • Do not incur the I-node resource limitation problem • Without compromising the big file reference machnisms

  5. Design Figure 1. Layout of structured block

  6. Figure 2. Structure of directory entry

  7. Figure 3. Blocking compacting

  8. Figure 4. System implementation big picture

  9. Evaluations • Workloads • Simple workloads • Batch tiny file creation • Batch tiny file sequential read • Batch tiny file deletion • Complex workloads • Randomly read/delete files • Randomly batch read/delete file • metrics • Number of IO transfer • Disk space utilization

  10. Simple workload-batch file creation Figure 5. Batch file creation: disk efficiency

  11. Simple workload-batch file creation-cont. Figure 6. Batch file creation: number of IO

  12. Simple workload-Batch file read Figure 7. Batch file read: number of IO

  13. Simple workload-Batch file deletion Figure 8. Batch file delete: disk space efficiency

  14. Simple workload-Batch file deletion cont. Figure 9. Batch file delete: number of IO

  15. Complex workload Figure 10. Randomly read/delete files

  16. Complex workload cont. Figure 11. Randomly batch read/delete files

  17. Drawbacks • When tiny file is modified to become a large one, such modification requires additional operations. • The storage of directories is not space efficient.

  18. THANK YOU!

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