ext4 - What file system does Android use? -

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which file system android use? have read both ext4 , yaffs2.

android used yaffs2 file system. after android 2.3, file system became ext4.

yaffs2 used nand flash in embedded systems such mobile phones. includes wear-leveling , gc mechanism nand flash, single-threaded.

according ars technica article, reason android switched ext4 yaffs2 file system because yaffs2 single-threaded, , "would have been bottleneck on dual-core systems." android, in 2010 looking forward when many cores used in smartphones. looking back, obvious right decision. smartphones went dual core around time of galaxy s2. more smart phones released in quad-core configuration, 6 , 8 core configurations on horizon.


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