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<div id="header">
<h1>
nn_env(7) Manual Page
</h1>
<h2>NAME</h2>
<div class="sectionbody">
<p>nn_env -
nanomsg environment variables
</p>
</div>
</div>
<div id="content">
<div class="sect1">
<h2 id="_description">DESCRIPTION</h2>
<div class="sectionbody">
<div class="paragraph"><p><strong>This functionality is experimental and a subject to change at any time</strong></p></div>
<div class="paragraph"><p>Following environment variables are used to turn on some debugging for any
nanomsg application. Please, do not try to parse output and do not
build business logic based on it.</p></div>
<div class="dlist"><dl>
<dt class="hdlist1">
NN_PRINT_ERRORS
</dt>
<dd>
<p>
If set to non-empty string nanomsg will print errors to stderr. Some errors
will be resolved by nanomsg itself (e.g. if nanomsg can&#8217;t establish
connection it will retry again in a moment). Some depend on the
environment (e.g. port that is bound by another process need to be
released). In any case nanomsg will not repeat the error message until
error is clear and appear again (e.g. connection established then broken
again).
</p>
</dd>
<dt class="hdlist1">
NN_PRINT_STATISTICS
</dt>
<dd>
<p>
If set to non-empty string nanomsg will print some statistics to stderr.
That&#8217;s statistics is intended for debugging purposes only.
</p>
</dd>
<dt class="hdlist1">
NN_STATISTICS_SOCKET
</dt>
<dd>
<p>
The nanomsg address to send statistics to. Nanomsg opens NN_PUB socket
and sends statistics there. The data is sent using ESTP protocol.
</p>
</dd>
</dl></div>
</div>
</div>
<div class="sect1">
<h2 id="_notes">NOTES</h2>
<div class="sectionbody">
<div class="paragraph"><p>The output of both debugging facilities (NN_PRINT_ERRORS, NN_PRINT_STATISTICS)
is intended for reading by human and a subject for change at any time (even
after 1.0 release).</p></div>
<div class="paragraph"><p>The NN_STATISTICS_SOCKET facility is intended to use by system administrators
to debug network and application issues. The ESTP format is stable. But the
nanomsg support of it is experimental and is subject to change or removal
until 1.0 release.</p></div>
<div class="paragraph"><p>Anyway, there is <strong>no excuse</strong> for making application logic based on the data
described here. And by application logic we mean any of the following:</p></div>
<div class="ulist"><ul>
<li>
<p>
Load balancing
</p>
</li>
<li>
<p>
Failover
</p>
</li>
<li>
<p>
Routing requests
</p>
</li>
<li>
<p>
Executing nn_connect/nn_bind
</p>
</li>
</ul></div>
<div class="paragraph"><p>There are other ways for load-balancing and failover in nanomsg. If you feel
you can&#8217;t do something, consider ask on the mailing list first.</p></div>
</div>
</div>
<div class="sect1">
<h2 id="_see_also">SEE ALSO</h2>
<div class="sectionbody">
<div class="paragraph"><p><a href="nanomsg.7.html">nanomsg(7)</a></p></div>
<div class="paragraph"><p><a href="http://github.com/estp">http://github.com/estp</a></p></div>
<div class="paragraph"><p><a href="http://github.com/estp/estp/blob/master/specification.rst">http://github.com/estp/estp/blob/master/specification.rst</a></p></div>
</div>
</div>
<div class="sect1">
<h2 id="_authors">AUTHORS</h2>
<div class="sectionbody">
<div class="paragraph"><p>Paul Colomiets &lt;<a href="mailto:paul@colomiets.name">paul@colomiets.name</a>&gt;</p></div>
</div>
</div>
</div>
<div id="footnotes"><hr /></div>
<div id="footer">
<div id="footer-text">
nanomsg 0.3-beta-2-g8ae44eb-dirty<br />
Last updated 2014-03-04 23:29:50 CET
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