[darcs-devel] Filesystem in DB, but data in filesystem

[Ben Coburn]

On Jul 30, 2007, at 05:52, Salvatore Insalaco wrote:

> 2007/7/30, Tommy Pettersson <ptp at lysator.liu.se>:
>
>>> However, we can do checksum if we want. Maybe a lightweight sha /  
>>> md5
>>> like checksum in file index to prevent this from happening.
>>
>> That would be the ultimate and near-to-bullet-proof solution (if
>> we assume darcs' general lock file guarantee us "atomic"
>> operation on the cache).
>
> I've got another, more "lightweight" idea: let's just store file
> modification timestamp in file index.
>
> [...]
>
> We lose the "case-sensitivity-on-case-insensitive-fs" property, but
> again we gain in simplicity and probably performance (I wouldn't bet
> on this one).
>

The name stored in the index is case sensitive, so I don't think we  
have to lose case sensitivity.

Regardless of how files are checksumed, I think the file index should  
store a sha hash for itself so that we can confirm its integrity.


Regards, Ben Coburn



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