JFFS2, UBIFS, and the growth of flash storage

Posted Dec 12, 2012 15:46 UTC (Wed) by dedekind (guest, #32521)
Parent article: JFFS2, UBIFS, and the growth of flash storage

Nail, thanks for an interesting article. You are right about buds. We thought that "bud" would be and obvious and self-describing terminology, but it apparently is not that obvious :-)

And yes, we really did not target block devices, but only raw flashes. There was a project to try UBIFS on block devices. Using it "as-is" will of course sucks, because UBI cannot really utilize the asynchronous I/O of the block layer. This is fixable though, but needs some work. I think the benchmark results would be a lot better in that case.

JFFS2, UBIFS, and the growth of flash storage

Posted Dec 12, 2012 21:08 UTC (Wed) by arnd (subscriber, #8866) [Link]

I believe all of the interesting block devices for this (SD, CF, eMMC, USB) are not actually asynchronous, unlike modern SSDs that would not benefit as much because they have less leaky abstractions and don't require you to write on erase block boundaries for best performance.