Add a man page section on parallel queries.

diff --git a/doc/man1/haeredes.1 b/doc/man1/haeredes.1
index 2c8508ef36afb5a37a7f39b569064a0496f9787a..569897e603c9af9a56bf82bb7ad685f27adc27e9 100644 (file)
--- a/doc/man1/haeredes.1
+++ b/doc/man1/haeredes.1
@@ -59,7 +59,9 @@ b.iana-servers.net.
 a.iana-servers.net.
 .fi
 .P
 a.iana-servers.net.
 .fi
 .P

-However, if you ask a root server, they will return the response in another section, called \(dqauthority\(dq. The \(dqanswer\(dq section is empty:
+However, if you ask a root server, they will return the response in
+another section, called \(dqauthority\(dq. The \(dqanswer\(dq section
+is empty:

 
 .nf
 .I $ dig +short @a.gtld-servers.net example.com NS
 
 .nf
 .I $ dig +short @a.gtld-servers.net example.com NS


@@ -79,6 +81,16 @@ resolver to check the data on the authoritative nameservers.
 .P
 So that's what we do. In NS mode, Haeredes will check both the
 \(dqanswer\(dq and \(dqauthority\(dq sections for results.
 .P
 So that's what we do. In NS mode, Haeredes will check both the
 \(dqanswer\(dq and \(dqauthority\(dq sections for results.

+.SH PARALLEL QUERIES
+.P
+Haeredes can use multiple threads to perform its queries. It will use
+a number of threads equal to the number of processors available to the
+GHC runtime. This can be changed with the \fI+RTS \-N\fR flag. For
+example, to use 10 threads,
+
+.nf
+$ haeredes [OPTIONS] [DELEGATES] \fI+RTS -N10\fR
+.fi

 .SH OPTIONS
 
 .IP \fB\-\-no\-append\-root\fR,\ \fB-n\fR
 .SH OPTIONS
 
 .IP \fB\-\-no\-append\-root\fR,\ \fB-n\fR