tree 656865b54a8eda25fa15498f64ef3147bc9c6b2f
parent 729c901c3fcca6f4950e2b0e086e86cc2a73bbde
author Baptiste Assmann <bedis9@gmail.com> 1493881500 +0200
committer Willy Tarreau <w@1wt.eu> 1496396401 +0200
encoding latin1

MINOR: dns: implement a LRU cache for DNS resolutions

Introduction of a DNS response LRU cache in HAProxy.

When a positive response is received from a DNS server, HAProxy stores
it in the struct resolution and then also populates a LRU cache with the
response.
For now, the key in the cache is a XXHASH64 of the hostname in the
domain name format concatened to the query type in string format.