rob05c opened a new pull request #5127: URL: https://github.com/apache/trafficcontrol/pull/5127
Adds support to ORT to set the ATS parent secondary_mode=2 setting, which will make ATS try all primary parents before falling back to secondaries. The default is to immediately try a secondary on primary failure. Immediately trying a secondary is usually preferable when the object is likely to be in cache, such as VOD libraries. Trying all primaries first is preferable when the object is unlikely to be in cache very long, such as LIVE video. This allows Delivery Services to set their behavior based on the use case. Includes tests. Includes changelog. Includes docs. - [x] This PR is not related to any other Issue ## Which Traffic Control components are affected by this PR? - Traffic Ops ORT ## What is the best way to verify this PR? Run tests. Add the DS Parameter (see docs), run ORT, verify `secondary_mode` directive is inserted in parent.config line. ## If this is a bug fix, what versions of Traffic Control are affected? Not a bug fix. ## The following criteria are ALL met by this PR - [x] This PR includes tests OR I have explained why tests are unnecessary - [x] This PR includes documentation OR I have explained why documentation is unnecessary - [x] This PR includes an update to CHANGELOG.md OR such an update is not necessary - [x] This PR includes any and all required license headers - [x] This PR ensures that database migration sequence is correct OR this PR does not include a database migration - [x] This PR **DOES NOT FIX A SERIOUS SECURITY VULNERABILITY** (see [the Apache Software Foundation's security guidelines](https://www.apache.org/security/) for details) ## Additional Information ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: [email protected]
