ZFS and WAFL
Posted Jun 17, 2007 17:29 UTC (Sun) by joern
In reply to: ZFS and WAFL
Parent article: Linus on GPLv3 and ZFS
Checksums are easy to add once you have a COW format. Either you add them to the block pointers, as ZFS did, or you add them to the objects themselves, as JFFS2 and LogFS did.
Either way you have an incompatible format change. But the amount of code affected if rather small. Took about 1-2% of the effort to design a new filesystem in the LogFS case.
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