Chris Jones wrote:
> When is Ubuntu going to support ext4 file system?
>
> Will it make it into Feisty Fawn final build?
>
> Chris Jones
>
>
A better question: What features of ext4 make it so much better than ext3?
* Allocate on Flush (faster, less fragmentation)
* Extents (faster, less fragmentation)
* Larger file systems (32TiB vs 1024PiB)
It seems that you can activate ext4 and mount an ext3 file system
WITHOUT '-o extents' and utilize the Allocate-on-Flush algorithm without
actually changing the on-disk format grammar.
You can add extents by using 'mount -o extents', but you can no longer
mount the file system as ext3 after this. As a side effect, if (as Matt
said) the on-disk format changes, you need to backup/restore to upgrade
your kernel.
You can utilize the >32TiB size only by reformatting. Same concern as
Matt said.
When ext4 comes along, it may be safe for you to activate it and take
advantage of its ext3-compatible operation; then again, you may want to
hold until it's official. This is a decision only you can make; you are
playing with your data, MAKE BACKUPS.
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