Mercurial > hg > nginx-quic
annotate docs/man/nginx.8 @ 8162:c5ea341f705a quic
QUIC: optimized acknowledgement generation.
For application level packets, only every second packet is now acknowledged,
respecting max ack delay.
13.2.1 Sending ACK Frames
In order to assist loss detection at the sender, an endpoint SHOULD
generate and send an ACK frame without delay when it receives an ack-
eliciting packet either:
* when the received packet has a packet number less than another
ack-eliciting packet that has been received, or
* when the packet has a packet number larger than the highest-
numbered ack-eliciting packet that has been received and there are
missing packets between that packet and this packet.
13.2.2. Acknowledgement Frequency
A receiver SHOULD send an ACK frame after receiving at least two
ack-eliciting packets.
author | Vladimir Homutov <vl@nginx.com> |
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date | Fri, 23 Oct 2020 17:08:50 +0300 |
parents | 4718a646187a |
children | f18db38a9826 |
rev | line source |
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2 .\" Copyright (C) 2010, 2019 Sergey A. Osokin |
5000 | 3 .\" Copyright (C) Nginx, Inc. |
3788 | 4 .\" All rights reserved. |
5 .\" | |
6 .\" Redistribution and use in source and binary forms, with or without | |
7 .\" modification, are permitted provided that the following conditions | |
8 .\" are met: | |
9 .\" 1. Redistributions of source code must retain the above copyright | |
10 .\" notice, this list of conditions and the following disclaimer. | |
11 .\" 2. Redistributions in binary form must reproduce the above copyright | |
12 .\" notice, this list of conditions and the following disclaimer in the | |
13 .\" documentation and/or other materials provided with the distribution. | |
14 .\" | |
15 .\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND | |
16 .\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
17 .\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
18 .\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE | |
19 .\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
20 .\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
21 .\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
22 .\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
23 .\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
24 .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
25 .\" SUCH DAMAGE. | |
26 .\" | |
27 .\" | |
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28 .Dd December 5, 2019 |
3788 | 29 .Dt NGINX 8 |
30 .Os | |
31 .Sh NAME | |
32 .Nm nginx | |
33 .Nd "HTTP and reverse proxy server, mail proxy server" | |
34 .Sh SYNOPSIS | |
35 .Nm | |
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36 .Op Fl ?hqTtVv |
3788 | 37 .Op Fl c Ar file |
38 .Op Fl g Ar directives | |
39 .Op Fl p Ar prefix | |
40 .Op Fl s Ar signal | |
41 .Sh DESCRIPTION | |
42 .Nm | |
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43 (pronounced |
3788 | 44 .Dq engine x ) |
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45 is an HTTP and reverse proxy server, a mail proxy server, and a generic |
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46 TCP/UDP proxy server. |
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47 It is known for its high performance, stability, rich feature set, simple |
3788 | 48 configuration, and low resource consumption. |
49 .Pp | |
50 The options are as follows: | |
51 .Bl -tag -width ".Fl d Ar directives" | |
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52 .It Fl ?\& , h |
3788 | 53 Print help. |
54 .It Fl c Ar file | |
55 Use an alternative configuration | |
56 .Ar file . | |
57 .It Fl g Ar directives | |
58 Set global configuration directives. | |
59 See | |
60 .Sx EXAMPLES | |
61 for details. | |
62 .It Fl p Ar prefix | |
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63 Set the prefix path. |
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64 The default value is |
3788 | 65 .Pa %%PREFIX%% . |
66 .It Fl q | |
67 Suppress non-error messages during configuration testing. | |
68 .It Fl s Ar signal | |
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69 Send a signal to the master process. |
3788 | 70 The argument |
71 .Ar signal | |
72 can be one of: | |
73 .Cm stop , quit , reopen , reload . | |
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74 The following table shows the corresponding system signals: |
3788 | 75 .Pp |
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76 .Bl -tag -width ".Cm reopen" -compact |
3788 | 77 .It Cm stop |
78 .Dv SIGTERM | |
79 .It Cm quit | |
80 .Dv SIGQUIT | |
81 .It Cm reopen | |
82 .Dv SIGUSR1 | |
83 .It Cm reload | |
84 .Dv SIGHUP | |
85 .El | |
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86 .It Fl T |
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87 Same as |
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88 .Fl t , |
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89 but additionally dump configuration files to standard output. |
3788 | 90 .It Fl t |
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91 Do not run, just test the configuration file. |
3788 | 92 .Nm |
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93 checks the configuration file syntax and then tries to open files |
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94 referenced in the configuration file. |
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95 .It Fl V |
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96 Print the |
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97 .Nm |
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98 version, compiler version, and |
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99 .Pa configure |
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100 script parameters. |
3788 | 101 .It Fl v |
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102 Print the |
3788 | 103 .Nm |
104 version. | |
105 .El | |
106 .Sh SIGNALS | |
107 The master process of | |
108 .Nm | |
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109 can handle the following signals: |
3788 | 110 .Pp |
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111 .Bl -tag -width ".Dv SIGINT , SIGTERM" -compact |
3788 | 112 .It Dv SIGINT , SIGTERM |
113 Shut down quickly. | |
114 .It Dv SIGHUP | |
115 Reload configuration, start the new worker process with a new | |
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116 configuration, and gracefully shut down old worker processes. |
3788 | 117 .It Dv SIGQUIT |
118 Shut down gracefully. | |
119 .It Dv SIGUSR1 | |
120 Reopen log files. | |
121 .It Dv SIGUSR2 | |
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122 Upgrade the |
3788 | 123 .Nm |
124 executable on the fly. | |
125 .It Dv SIGWINCH | |
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126 Shut down worker processes gracefully. |
3788 | 127 .El |
128 .Pp | |
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129 While there is no need to explicitly control worker processes normally, |
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130 they support some signals too: |
3788 | 131 .Pp |
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132 .Bl -tag -width ".Dv SIGINT , SIGTERM" -compact |
3788 | 133 .It Dv SIGTERM |
134 Shut down quickly. | |
135 .It Dv SIGQUIT | |
136 Shut down gracefully. | |
137 .It Dv SIGUSR1 | |
138 Reopen log files. | |
139 .El | |
140 .Sh DEBUGGING LOG | |
141 To enable a debugging log, reconfigure | |
142 .Nm | |
143 to build with debugging: | |
144 .Pp | |
145 .Dl "./configure --with-debug ..." | |
146 .Pp | |
147 and then set the | |
148 .Cm debug | |
149 level of the | |
150 .Va error_log : | |
151 .Pp | |
152 .Dl "error_log /path/to/log debug;" | |
153 .Pp | |
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154 It is also possible to enable the debugging for a particular IP address: |
3788 | 155 .Bd -literal -offset indent |
156 events { | |
157 debug_connection 127.0.0.1; | |
158 } | |
159 .Ed | |
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160 .Sh ENVIRONMENT |
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161 The |
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162 .Ev NGINX |
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163 environment variable is used internally by |
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164 .Nm |
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165 and should not be set directly by the user. |
3788 | 166 .Sh FILES |
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167 .Bl -tag -width indent |
3788 | 168 .It Pa %%PID_PATH%% |
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169 Contains the process ID of |
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170 .Nm . |
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171 The contents of this file are not sensitive, so it can be world-readable. |
3788 | 172 .It Pa %%CONF_PATH%% |
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173 The main configuration file. |
3788 | 174 .It Pa %%ERROR_LOG_PATH%% |
175 Error log file. | |
176 .El | |
177 .Sh EXIT STATUS | |
178 Exit status is 0 on success, or 1 if the command fails. | |
179 .Sh EXAMPLES | |
180 Test configuration file | |
181 .Pa ~/mynginx.conf | |
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182 with global directives for PID and quantity of worker processes: |
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183 .Bd -literal -offset indent |
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184 nginx -t -c ~/mynginx.conf \e |
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185 -g "pid /var/run/mynginx.pid; worker_processes 2;" |
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186 .Ed |
3788 | 187 .Sh SEE ALSO |
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188 .\"Xr nginx.conf 5 |
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189 .\"Pp |
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190 Documentation at |
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191 .Pa http://nginx.org/en/docs/ . |
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192 .Pp |
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193 For questions and technical support, please refer to |
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194 .Pa http://nginx.org/en/support.html . |
3788 | 195 .Sh HISTORY |
196 Development of | |
197 .Nm | |
3800 | 198 started in 2002, with the first public release on October 4, 2004. |
3788 | 199 .Sh AUTHORS |
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200 .An -nosplit |
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201 .An Igor Sysoev Aq igor@sysoev.ru . |
3788 | 202 .Pp |
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203 This manual page was originally written by |
3788 | 204 .An Sergey A. Osokin Aq osa@FreeBSD.org.ru |
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205 as a result of compiling many |
3788 | 206 .Nm |
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207 documents from all over the world. |