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> I understand this filesystem is still nascent, but shouldn't data integrity at least be one of the design goals?

What makes you think it isn't? It definitely is. In fact, it borrows several ideas from ZFS wrt/ integrity.

For example, it uses parent block checksums like ZFS.




> What makes you think it isn't?

The first section in the README is called "Design goals", with 13 items. None of them is "data integrity", and none of them even talks about validating the data or handling any failures aside from power loss.

By contrast, in the canonical slide deck on ZFS[1], the first slide talks about "provable end-to-end data integrity". In the paper[2], "design principles" section 2.6 is "error detection and correction".

I'm glad to hear that's also a focus for TFS. With ZFS, the emphasis on data integrity resulted in significant architectural choices -- I'm not sure it's something that can just be bolted on later. As a reader, I wouldn't have assumed TFS had the same emphasis. I think it's pretty valuable to spell this out early and clearly, with details, because it's actually quite a differentiator compared with most other systems.

[1] https://wiki.illumos.org/download/attachments/1146951/zfs_la...

[2] http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.184...


> The first section in the README is called "Design goals", with 13 items. None of them is "data integrity", and none of them even talks about validating the data or handling any failures aside from power loss.

Fair enough.


I can't tell from the code whether this is metadata only checksumming or if data is also checksummed. ZFS and Btrfs checksum both metadata and data.


The data is summed too.




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