HDD Write Performance: Pre-allocate vs. Append (Inode Impact?)
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When writing a large (10GB) file to an HDD, I'm considering two approaches for writing the data:
1. Pre-allocate: Create a 10GB file upfront and then write data sequentially (e.g., using fallocate on Linux or similar methods on other OS).
2. Append: Start with an empty file and append data until 10GB.
I'm curious about the performance differences and if inode management plays a significant role, especially considering the potential for contiguous space allocation with pre-allocation versus repeated metadata updates with appending.
Are there performance best practices for large file writes to HDDs, and do different OS/file systems behave differently in this regard? Any insights or experiences are appreciated.
Asked by Long Bùi Hải
(21 rep)
Apr 10, 2025, 02:20 AM