That's true. Using bigger buffer will help, but it doesn't tell why reading
large size file is slower than reading small size file.

On Sat, Feb 21, 2009 at 5:56 PM, Wojciech Puchar <> wrote:

> I'm just guessing inode structure, the physical file location on HDD
>> might be related to this. But, if I read only one file, the size
>> doesn't matter. Reading file (10M, 100M, 700M) gives constantly about
>> 70MB/s, and the weird thing happens when I read 2 files of big size.
> if you use O_DIRECT it's read from disk exactly as you specified, without
> readahead, so you do a lot of seeks.
> simply use bigger buffer like 1MB

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