X-Git-Url: https://git.octo.it/?p=rrdtool.git;a=blobdiff_plain;f=doc%2Frrdtutorial.pod;h=385ed089b0374a8d9c741c34b08b4f92e9b58824;hp=e43830cd853a74e9c474daddc7bac5e507336a1f;hb=127fb65e9cdbf2343344d1e9c1af9874cae8113e;hpb=26f7c5c1ba83c8ab82cd271b143061f7fb13394c diff --git a/doc/rrdtutorial.pod b/doc/rrdtutorial.pod index e43830c..385ed08 100644 --- a/doc/rrdtutorial.pod +++ b/doc/rrdtutorial.pod @@ -4,7 +4,7 @@ rrdtutorial - Alex van den Bogaerdt's RRDtool tutorial =head1 DESCRIPTION -RRDtool is written by Tobias Oetiker with +RRDtool is written by Tobias Oetiker with contributions from many people all around the world. This document is written by Alex van den Bogaerdt to help you understand what RRDtool is and what it can do for you. @@ -61,7 +61,7 @@ RRDtool originated from MRTG (Multi Router Traffic Grapher). MRTG started as a tiny little script for graphing the use of a university's connection to the Internet. MRTG was later (ab-)used as a tool for graphing other data sources including temperature, speed, voltage, -number of printouts and the like. +number of printouts and the like. Most likely you will start to use RRDtool to store and process data collected via SNMP. The data will most likely be bytes (or bits) @@ -98,7 +98,7 @@ and not only for this particular one. Look in the documentation that came with RRDtool for the location and usage of the list. I suggest you take a moment to subscribe to the mailing list right now -by sending an email to Errd-users-request@list.ee.ethz.chE with a +by sending an email to Errd-users-request@lists.oetiker.chE with a subject of "subscribe". If you ever want to leave this list, just write an email to the same address but now with a subject of "unsubscribe". @@ -375,7 +375,7 @@ kilometers or millimeters! RRDtool doesn't know about the physical units of our data, it just works with dimensionless numbers. If we had measured our distances in meters, this would have been -(12'357'000-12'345'000)/300 = 12'000/300 = 40. +(12'357'000-12'345'000)/300 = 12'000/300 = 40. As most people have a better feel for numbers in this range, we'll correct that. We could recreate our database and store the correct @@ -1027,9 +1027,9 @@ Correction numbers: Should become: 18'446'744'073'709'551'800 But really is: 184 Delta: -18'446'744'073'709'550'816 - Correction1: -18'446'744'073'709'550'816 + Correction1: -18'446'744'073'709'550'816 + 4'294'967'296 = -18'446'744'069'414'583'520 - Correction2: -18'446'744'069'414'583'520 + Correction2: -18'446'744'069'414'583'520 + 18'446'744'069'414'584'320 = 800 Before: 18'446'744'073'709'551'615 ( maximum value ) @@ -1138,7 +1138,7 @@ Create output View both images together (add them to your index.html file) and compare. Both graphs should show the same, despite the -input being different. +input being different. =head1 WRAPUP