Pedro Ribeiro wrote:
Ooops, we are using SIS, guess the solution for a similar optimization
will be a native deduplicated filesystem.
A non-deduplicated filesystem is fine considering the current hash-based
folder structure. Just:
1. Switch to a hash with no known collision method (i.e. not sha1)
2. Run a crontab that causes all files with the same hash in filename to
be hard linked together.
This kind of "skip byte-by-byte" thinking was there since the initial
implementation of SIS[1], but was never added for some reason.
[1]: https://www.dovecot.org/list/dovecot/2010-August/052175.html
I currently do a much, much reduced version of that: I just run a
crontab to get `jdupes` to do its byte-by-byte comparison over the
attachment directory, daily. Duplicates get hard linked.
PS: I swear the documentation for sis-queue is wrong.
Sincerely,
Mingye Wang
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