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Which inode pointer strategy would you choose to optimize for both storage efficiency and access speed, and why?

hard🌍 Real-world Scenario Q9 of Q15
Operating Systems - Inode Structure - File Metadata & Block Pointers
You are designing a file system for a cloud storage service where most files are small but some can be extremely large. Which inode pointer strategy would you choose to optimize for both storage efficiency and access speed, and why?
AUse a balanced number of direct and indirect pointers to handle both small and large files efficiently
BUse many direct pointers and no indirect pointers to optimize small file access
CUse only indirect pointers to simplify inode structure and handle large files
DUse triple indirect pointers exclusively to maximize file size support
Step-by-Step Solution
Solution:
  1. Step 1: Analyze file size distribution

    Most files are small, so direct pointers optimize their access speed and reduce overhead.
  2. Step 2: Consider large file support

    Indirect pointers are necessary to support extremely large files beyond direct pointer capacity.
  3. Step 3: Evaluate options

    Use a balanced number of direct and indirect pointers to handle both small and large files efficiently balances direct pointers for small files and indirect pointers for large files. Use many direct pointers and no indirect pointers to optimize small file access ignores large files. Use only indirect pointers to simplify inode structure and handle large files sacrifices small file efficiency. Use triple indirect pointers exclusively to maximize file size support adds unnecessary overhead for small files.
  4. Final Answer:

    Option A -> Option A
  5. Quick Check:

    Balanced pointers optimize both small and large file handling [OK]
Quick Trick: Balance direct and indirect pointers for mixed file sizes [OK]
Common Mistakes:
MISTAKES
  • Favoring only direct or only indirect pointers without considering file size distribution
Trap Explanation:
PITFALL
  • Candidates often optimize for one file size extreme, ignoring the other.
Interviewer Note:
CONTEXT
  • Assesses design trade-offs in real-world file system scenarios.
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