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
.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
.IP \fB\-\-server\fR,\ \fB-s\fR
Use the given DNS server rather than the resolvers listed in
/etc/resolv.conf. Either an IP address or a hostname will work.
+.IP \fB\-\-timeout\fR,\ \fB-t\fR
+The number of seconds to wait for an answer from DNS (default: 15).
.SH EXAMPLES
.IP \[bu] 2