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zboxfs / zbox

Zero-details, privacy-focused in-app file system.
https://zbox.io/fs/
Apache License 2.0
1.53k stars 74 forks source link

Zbox characteristics as a filesystem #58

Closed vi closed 4 years ago

vi commented 4 years ago

Most of README is about encryption and security, also some about backend support.

But I don't see typical filesystem metrics like maximum file size, maximum filesystem size, maximum number of files, overhead, fragmentation resilience and so on.

Shall README also mention those parameters?

For example, is zbox suitable for storage of very large number of small files? How slow is to delete those files afterwards?

burmecia commented 4 years ago

Good suggestion. I will update the README to add more about the characteristics soon. Thanks.

vi commented 4 years ago

Maximum data file size (file storage) 32 MiB

Does it mean files larger than 32 megabytes are not supported?

Or maybe it meat to be "gigabytes"?

burmecia commented 4 years ago

Maximum data file size (file storage) 32 MiB

Does it mean files larger than 32 megabytes are not supported?

Or maybe it meat to be "gigabytes"?

No, 32 MiB data file size means each data file (encrypted) saved on the underlying file storage is maximun 32 MiB, the size limit of a file in ZboxFS is 16 EiB. One ZboxFS file can across one or many data files.

vi commented 4 years ago

Does it mean it is only relevant in file:// mode?

Maybe instead of "Maximum data file size (file storage)" it can be "Maximum underlying file size for file:// storage"?

burmecia commented 4 years ago

Does it mean it is only relevant in file:// mode?

Maybe instead of "Maximum data file size (file storage)" it can be "Maximum underlying file size for file:// storage"?

Yes, it is correct. I will put better wording later on.

vi commented 4 years ago

Does maximum file size depend on pointer width of the system ZboxFS is running on?

Is File::set_len accepting usize instead of u64 a deliberate design choice or oversight?