limited commented on a change in pull request #1908: Changes for Backup Edge Cache Group URL: https://github.com/apache/incubator-trafficcontrol/pull/1908#discussion_r170248422
########## File path: docs/source/admin/traffic_ops/using.rst ########## @@ -881,7 +892,9 @@ The CZF is an input to the Traffic Control CDN, and as such does not get generat The script that generates the CZF file is not part of Traffic Control, since it is different for each situation. -.. note:: The ``"coordinates"`` section is optional and may be used by Traffic Router for localization in the case of a CZF "hit" where the zone name does not map to a Cache Group name in Traffic Ops (i.e. Traffic Router will route to the closest Cache Group(s) geographically). +.. note:: The ``"coordinates"`` section is optional and may be used by Traffic Router for localization in the case of a CZF "hit" where the zone name does not map to a Cache Group name in Traffic Ops (i.e. Traffic Router will route to the closest Cache Group(s) geographically). + +The ``"backupList"`` section is optional and may be used by Traffic Router for localization in the case of a CZF "hit" where the zone name does not map to a Cache Group name in Traffic Ops (i.e. Traffic Router will route to the configured backup Cache Group(s)). This can be used as an alternative to ``"coordinates"`` therby enabling operators to have a control over choosing back up edge servers rather than depending on Geo-coordinates based routing. Review comment: Please also mention that the list is ordered. Also, include that if there are no caches available in any of the listed groups, the request will be bypassed (if configured) or rejected ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: us...@infra.apache.org With regards, Apache Git Services
