I experimented for checking the LBA of files using IOzone. I run IOzone with flag -o (sync write) and -i 0 (seq. write) -t 4 (4 thread) -r 32k(32 kilobytes record size).
And I thought that the LBA of 4 files might be split by 32 kilobytes record size and interfere each other. But the result is weird. The files are located with bigger size than I expected. And the size is 2x bigger each chucks. Actually i tried that on ext4 before. And I thought the reason is the multi block allocator of ext4. But it's same on ext3. After that, I checked the request size using blktrace. And the request size was 32KB as I expected.
I can't figure out the reason. I post it with the result of my experiment
Please help me guys.
Thank you for reading my question.
