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[Q] Is this true and does it mean there is dynamic defragmentation in ext2/3?

Someone recently posted the following statement midway down the page at http://forums.gentoo.org/viewtopic-t-305871-postdays-0-postorder-asc-highlight-ext3+ordered+data-start-25.html

You don't need to defragment ext2/ext3 because as you use the filesystem file blocks and inodes are moved around and reallocated to keep the data nearly contiguous. It's not perfect, but it works fairly well and you should almost never see a performance degradation caused by the filesystem's fragmentation.

Is this statement accurate and does it mean ext2/3 is performing a sort of dynamic defragmentation?

Maurice Volaski, mvolaski aecom yu edu
Computing Support, Rose F. Kennedy Center
Albert Einstein College of Medicine of Yeshiva University

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