Date: Mon, 15 Apr 2019 21:36:00 +0000 (UTC)
From: ianswett <notifications@github.com>
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Subject: Re: [quicwg/base-drafts] Clarify time threshold vs crypto timer
 (#2620)
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ianswett commented on this pull request.



> @@ -537,8 +537,13 @@ and otherwise it MUST send an Initial packet in a UDP datagram of at least
 1200 bytes.
 
 The crypto retransmission timer is not set if the time threshold
-{{time-threshold}} loss detection timer is set.  When the crypto
-retransmission timer is active, the probe timer ({{pto}}) is not active.
+{{time-threshold}} loss detection timer is set.  The time threshold loss
+detection timer is both expected to expire earlier than the crypto
+retransmission timeout and be much less likely to spuriously retransmit data.
+The Initial and Handshake packet number spaces are typically going to have a

I tightened up the text, but feel free to suggest further clarification.

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<p><b>@ianswett</b> commented on this pull request.</p>

<hr>

<p>In <a href="https://github.com/quicwg/base-drafts/pull/2620#discussion_r275554274">draft-ietf-quic-recovery.md</a>:</p>
<pre style='color:#555'>&gt; @@ -537,8 +537,13 @@ and otherwise it MUST send an Initial packet in a UDP datagram of at least
 1200 bytes.
 
 The crypto retransmission timer is not set if the time threshold
-{{time-threshold}} loss detection timer is set.  When the crypto
-retransmission timer is active, the probe timer ({{pto}}) is not active.
+{{time-threshold}} loss detection timer is set.  The time threshold loss
+detection timer is both expected to expire earlier than the crypto
+retransmission timeout and be much less likely to spuriously retransmit data.
+The Initial and Handshake packet number spaces are typically going to have a
</pre>
<p>I tightened up the text, but feel free to suggest further clarification.</p>

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