Github user ushachar commented on the issue:
https://github.com/apache/trafficserver/pull/712
The reason for wanting this feature is to support prolonged content related
actions -- in @davidbz case out-of-process content malware analysis.
When acting as a forward proxy and handling a request for a very large
file, he needs to support an initial analysis on the first N MBs of the file in
order to decide if he must analyze the full file or can release it to the
client.
This analysis can take a significant amount of time and continuing to
buffer the contents can lead to resource exhaustion.
(When combined with turning on flow control to make sure that we throttle
the proxy<->upstream tcp connection)
@bgaff - I know you had some concerns regarding this - does this use case
seem reasonable to you?
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