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https://issues.apache.org/jira/browse/TS-2150?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14582538#comment-14582538
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François Pesce commented on TS-2150:
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An interesting evolution of this feature would be to provide milestone
computation in logs:
We often need to have latency between one milestone and another, for example:
the time from proxy to origin server would be milestone.server_first_read -
milestone.server_connect
that would allow this kind of format like:
{noformat}
%<msdiff-{SERVER_FIRST_READ}-{SERVER_CONNECT}-ms>
{noformat}
> Add Milestone log tags
> ----------------------
>
> Key: TS-2150
> URL: https://issues.apache.org/jira/browse/TS-2150
> Project: Traffic Server
> Issue Type: New Feature
> Components: Logging
> Reporter: Leif Hedstrom
> Assignee: John
>
> We have a notion of milestones in the core, and plugin APIs
> (TSHttpTxnMilestoneGet() ). It'd be useful to expose these milestone timers
> as a log tag, something like:
> {code}
> %<{UA_BEGIN}mtms>
> {code}
> mtms is just an example / suggestion, "MilestoneTimeMilliSecond", we can make
> it whatever we like.
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