25.05.2017

review at amazon: Apache SOLR for newbies

Last weekend this book fell into my hands:

https://www.amazon.de/Apache-Solr-Newbies-Paul-Lawson/dp/1540604187/ref=sr_1_3?ie=UTF8&qid=1495703687&sr=8-3&keywords=apache+solr

Paul Lawson wrote a splendid introduction into Apache SOLR. At the beginning he describes the motivation behind the project SOLR:
 "Outside the firewall  [searching] is used to make money, and inside to save money."
Within 130 pages this books covers everything from installation, adminstration GUI, examples to start (importing documents, first searches, etc.) and the quick overview to the fundamental configuration files.
If you are interested in Apache SOLR and you do not know where to start: this book is the answer.
But one thing is missing: The book only covers searching XML documents. On page 42 (!) it is pointed out, that you have to configure SOLR cell. I think this was a good decision, because deep dives should be done after an introduction.

if you are interested, take a look at my review at amazon.de. (as all my reviews written in german ;-)

14.04.2017

Touchpad tuning on linux: touchpad-indicator...

I encoutered some problems with my touchpad on ubuntu:
While typing some text, the touchpad signalled the mouse some strange moves. Sometimes it marked parts of the text and the next key erased the highlighted text...

First idea was to edit the xorg.conf or something else, but i found a less difficult was via touchpad-indicator.

It can be installed via
apt-get install touchpad-indicator
Alittle problem is, that you can not run it via cli with just calling touchpad-indicator, because ubuntu installs this program into /opt:
/opt/extras.ubuntu.com/touchpad-indicator/bin/touchpad-indicator 


Here you can choose "disable touchpad on typing" and you are done...

25.03.2017

Review at amazon: Quality of Service for Intenet Multimedia

Over the last three months i read a really amazing book about quality of service techniques.
Today everyone has internet access with more than 50Mbit/s, it seems like overbooking does not happen anymore and traffic priorization is no longer needed.
But this is only the half of the truth: Using cloud service, video streaming, onling gaming, ... you can really fast reach the limit of your internet access bandwith.
Companies face the same problem at a different scale: They can buy up to 1Gb/s but if they use techniques like shared workplace, cloud storage etc. even they will exhaust their bandwidth.

If you are interested how priorization can be done (and what are the problems in real life), you should read this book:

It covers the theory and practice for multimedia streaming which is just one of many categories of internet traffic. It is clear that the proposed solution can only be implemented by internet service provicers - but here you can understand what they do und why they are doing it.

if you are interested, take a look at my review at amazon.de. (as all my reviews written in german ;-)