X-Git-Url: https://git.octo.it/?p=rrdtool.git;a=blobdiff_plain;f=doc%2Frrdtool.pod;h=84749af542042fb0a507492f8f9e90e50e8b390f;hp=f421974e075ee7d9761f9dee7603956e7af896bb;hb=d4110e29da41ce702bcc3327e86768c6f266915e;hpb=e053f3d54f601572593b348610671c533493d02f

diff --git a/doc/rrdtool.pod b/doc/rrdtool.pod
index f421974..84749af 100644
--- a/doc/rrdtool.pod
+++ b/doc/rrdtool.pod
@@ -34,8 +34,8 @@ While the man pages talk of command line switches you have to set in
 order to make B<RRDtool> work it is important to note that
 B<RRDtool> can be remotely controlled through a set of pipes. This
 saves a considerable amount of startup time when you plan to make
-B<RRDtool> do a lot of things quickly. Check the section on L<"Remote
-Control"> further down. There is also a number of language bindings
+B<RRDtool> do a lot of things quickly. Check the section on L<Remote_Control>
+further down. There is also a number of language bindings
 for RRDtool which allow you to use it directly from perl, python, tcl,
 php, etc.
 
@@ -91,7 +91,11 @@ Change the size of individual RRAs. This is dangerous! Check L<rrdresize>.
 
 =item B<xport>
 
-Export data retrieved from one or several RRDs. Check L<rrdxport>
+Export data retrieved from one or several RRDs. Check L<rrdxport>.
+
+=item B<flush>
+
+Flush the values for a spcific RRD file from memory. Check L<rrdflush>.
 
 =item B<rrdcgi>
 
@@ -154,7 +158,7 @@ The use of B<RRA>s guarantees that the B<RRD> does not grow over
 time and that old data is automatically eliminated. By using the
 consolidation feature, you can still keep data for a very long time,
 while gradually reducing the resolution of the data along the time
-axis. 
+axis.
 
 Using different consolidation functions (B<CF>) allows you to store
 exactly the type of information that actually interests you: the maximum
@@ -260,21 +264,21 @@ accepts the same arguments as on the command line and some special
 commands like B<quit, cd, mkdir> and B<ls>. For detailed help on the
 server commands type:
 
-   rrdtool help cd|mkdir|ls|quit
+   rrdtool help cd|mkdir|pwd|ls|quit
 
-When a command is completed, RRDtool will print the string  'C<OK>', 
-followed by timing information of the form B<u:>I<usertime> 
-B<s:>I<systemtime>. Both values are the running totals of seconds 
-since RRDtool was started. If an error occurs, a line of the 
-form 'C<ERROR:> I<Description of error>' will be printed. B<RRDtool>
-will not abort, if possible, but follow the ERROR line with an OK line.
-If a B<workdir> is specified and the UID is 0, RRDtool will do a 
-chroot to that workdir. If the UID is not 0, RRDtool only changes the
-current directory to B<workdir>.
+When a command is completed, RRDtool will print the string  'C<OK>',
+followed by timing information of the form B<u:>I<usertime>
+B<s:>I<systemtime>. Both values are the running totals of seconds since
+RRDtool was started. If an error occurs, a line of the form 'C<ERROR:>
+I<Description of error>' will be printed instead. B<RRDtool> will not abort,
+unless something realy serious happens. If
+a B<workdir> is specified and the UID is 0, RRDtool will do a chroot to that
+workdir. If the UID is not 0, RRDtool only changes the current directory to
+B<workdir>.
 
 =head2 RRD Server
 
-If you want to create a RRD-Server, you must choose a TCP/IP Service 
+If you want to create a RRD-Server, you must choose a TCP/IP Service
 number and add them to I</etc/services> like this:
 
  rrdsrv      13900/tcp                       # RRD server
@@ -285,7 +289,7 @@ server and the client system must use the same port, of course.
 
 With this configuration you can add RRDtool as meta-server to
 I</etc/inetd.conf>. For example:
-  
+
  rrdsrv stream tcp nowait root /opt/rrd/bin/rrdtool rrdtool - /var/rrd
 
 Don't forget to create the database directory /var/rrd and
@@ -298,9 +302,17 @@ sockets, tools like netcat, or in a quick interactive test by using
 B<NOTE:> that there is no authentication with this feature! Do not setup
 such a port unless you are sure what you are doing.
 
+=head1 RRDCACHED, THE CACHING DAEMON
+
+For very big setups, updating thousands of RRD files often becomes a serious IO
+problem. If you run into such problems, you might want to take a look at
+L<rrdcached>, a caching daemon for RRDTool which may help you lessen the
+stress on your disks.
+
 =head1 SEE ALSO
 
-rrdcreate, rrdupdate, rrdgraph, rrddump, rrdfetch, rrdtune, rrdlast, rrdxport
+rrdcreate, rrdupdate, rrdgraph, rrddump, rrdfetch, rrdtune, rrdlast, rrdxport,
+rrdflush, rrdcached
 
 =head1 BUGS
 
@@ -308,5 +320,5 @@ Bugs? Features!
 
 =head1 AUTHOR
 
-Tobias Oetiker <oetiker@ee.ethz.ch>
+Tobias Oetiker <tobi@oetiker.ch>