ywkaras commented on a change in pull request #7897:
URL: https://github.com/apache/trafficserver/pull/7897#discussion_r640909701
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File path: configs/strategies.yaml.default
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@@ -95,15 +95,24 @@
# hash_key: hostname # optional key to use for Hashing. Enum of 'url' or
'uri' or 'hostname' or 'path' or 'path+query' or 'cache_key' or 'path+fragment'
# go_direct: true # transactions may routed directly to the origin
true/false default is true.
# parent_is_proxy: false # next hop hosts are origin servers when set to
'false', defaults to true and indicates next hop hosts are ats cache's.
+# cache_peer_result: true # only used when the 'ring_mode' is set to
'peering_ring' and the policy is 'consistent_hash'. The default value is
+# true which means to always allow caching responses.
When set to 'false' reponses received from peer hosts will not be
+# cached, only responses received from upstream parents
or origins will be cached.
# groups: # groups of hosts, these groups are used as rings in consistent
hash and arrays of host groups for round_robin.
# - *g1
# - *g2
# scheme: http
# failover:
# max_simple_retries: 2 # default is 1, indicates the maximum number of
simple retries for the listed response codes.
-# ring_mode: exhaust_ring # enumerated as exhaust_ring or alternate_ring
+# ring_mode: exhaust_ring # enumerated as exhaust_ring, alternate_ring,
or peering_ring
# #1) in 'exhaust_ring' mode all the servers in a ring are exhausted
before failing over to secondary ring
# #2) in 'alternate_ring' mode causes the failover to another server
in secondary ring.
+# #3) 'peering_ring' is implemented for only a policy of
'consistent_hash' and requires that the strategy
+# has two host groups defined. The first group is the 'peer'
group of caches that also includes this host
+# itself. The second group is the 'upstream' group of caches.
All parent host lookups are looked up from
Review comment:
Isn't it possible that the upstream group uses a VIP? In that case would
the upstream group just have one member, the VIP hostname?
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