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https://issues.apache.org/jira/browse/TS-2238?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Susan Hinrichs closed TS-2238.
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Resolution: Won't Fix
Discussion of [~bcall] and [~zwoop] determined that tracking the ACK for
logging is not feasible at this point in time.
> Log transfer time from start of request to last ACK has been received
> ---------------------------------------------------------------------
>
> Key: TS-2238
> URL: https://issues.apache.org/jira/browse/TS-2238
> Project: Traffic Server
> Issue Type: Improvement
> Components: Logging
> Reporter: Ask Bjørn Hansen
> Priority: Minor
> Fix For: sometime
>
>
> The ttms log variable logs until the last byte has been written to the
> socket. For some applications it'd be useful to track the download time until
> the last ACK has been received (or has timed out). It's possible that the
> tcp_info data structure would have this information.
> The (obvious) disadvantage is that connection might have to linger for a long
> time before it can be finished and logged. Not sure if there's a reasonable
> work-around for that.
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