[Dovecot] Single instance storage - testing please

[Michael Orlitzky]

On 08/26/2010 09:00 PM, Timo Sirainen wrote:
> On 27.8.2010, at 1.52, Michael Orlitzky wrote:
>
>> On 08/26/2010 04:41 PM, Mike Abbott wrote:
>>>> 1. What hash algorithm to use?
>>>
>>>> 2. Should I add support for trusting hash uniqueness
>>>
>>> Use two hash functions and concatenate the hashes.  While both
>>> hash systems may eventually be hacked it is unlikely that hacking
>>> them will result in a targeted alias.
>>
>> Just make it possible to change the hash in the future.
>
> I'm thinking about mail_attachment_hash setting where you can
> configure it pretty much any way you want.
>
>> Have a utility that updates all (or a subset) of them.
>
> That won't be necessary. Once the hash changes, the new files are
> created with new hash function and it doesn't matter if the old hash
> is broken because you can't generate new files with it anymore
> anyway.
>

Won't files hashed with the old function begin to dupe though?