tree ada9583b08361246cde2b4f008fe308b68c98378
parent b6c0ac94a444be5f965f14492bf447ba0910daf1
author Willy Tarreau <w@1wt.eu> 1384435835 +0100
committer Willy Tarreau <w@1wt.eu> 1384443470 +0100
encoding latin1

MEDIUM: backend: add support for the wt6 hash

This function was designed for haproxy while testing other functions
in the past. Initially it was not planned to be used given the not
very interesting numbers it showed on real URL data : it is not as
smooth as the other ones. But later tests showed that the other ones
are extremely sensible to the server count and the type of input data,
especially DJB2 which must not be used on numeric input. So in fact
this function is still a generally average performer and it can make
sense to merge it in the end, as it can provide an alternative to
sdbm+avalanche or djb2+avalanche for consistent hashing or when hashing
on numeric data such as a source IP address or a visitor identifier in
a URL parameter.