boost and cpp-netlib

-- Boost --
./bootstrap.sh --prefix=/home/lll/tmp/tmp-cpp-netlib/boost_1_49_0/
./b2 --layout=tagged install

(need layout to generate multithread boost libs)

-- cpp-netlib --
cmake -DBOOST_ROOT=/home/lll/tmp/tmp-cpp-netlib/boost_1_49_0/ -DCMAKE_BUILD_TYPE=Debug -DCMAKE_C_COMPILER=gcc -DCMAKE_CXX_COMPILER=g++ .
make

Scalability concepts

Google BigTable
http://labs.google.com/papers/bigtable.html

BigData : are datasets that grow so large that they become awkward to work with
http://en.wikipedia.org/wiki/Big_data

Hadoop

MapReduce : Google framework

Dynamo: Amazon's Highly Available Key-value Store
http://www.allthingsdistributed.com/files/amazon-dynamo-sosp2007.pdf

- Master / slave
- peer to peer
- cluster: similar components
- grid: different components

aptitude search result

p, meaning that no trace of the package exists on the system,
c, meaning that the package was deleted but its configuration files remain on the system,
i, meaning that the package is installed,
v, meaning that the package is virtual.

The second character indicates the stored action (if any; otherwise a blank space is displayed) to be performed on the package
i, meaning that the package will be installed,
d, meaning that the package will be deleted,
p, meaning that the package and its configuration files will be removed.

If the third character is A, the package was automatically installed

JNI

I had to do:

cd /usr/lib
ln -s /usr/local/jdk1.6.0_22/jre/lib/amd64/libjava.so .

to use -ljava

See also   swig

SEO

SEO: Search Engine Optimization
SMO: Social Media Optimization: Methodization of social media activity with the intent of attracting unique visitors to website content (Facebook button "I like")
SEM: Search Engine Marketting: through the use of, paid placement, contextual advertising, and paid inclusion

gnuplot

run gnuplot:

gnuplot> set timefmt "%H:%M:%S"
gnuplot> set xdata time
gnuplot> set logscale y
gnuplot> plot "day_poll.txt" using 2:1 title ' my title '

gnuplot> plot "<awk '{i=i+$2; print $1,i}' clicks_.txt" title ' clicks'
gnuplot> plot "<awk '{i=i+$2; print $1,i}' out-log-final.txt" title "LG", "<awk '{i=i+$2; print $1,i}' clicks_.txt" title "ozen"
.

freenx / qtnx

on the server:

Follow these instructions: FreeNX
• To see if nxserver processes were started after starting a client
watch 'ps aux |grep nx'

• To kill all server nx sessions (they will be restarted automatically at the next connection)
sudo nxserver --help
sudo nxserver --history
sudo nxserver --terminate username

• Other things:
sudo su - nx

• keys problems
  when setting up a new server machine. The following worked for me in the case where you have "Authenticating client" forever on your qtnx client
  root@aaa:/var/log# /usr/lib/nx/nxsetup --install --clean --purge

on the client:

install QTNX

If the graphical Qtnx GUI client does not show up, kill all qtnx process running on the client machine and run the qtnx client again

Make sure you set "gnome" (if you use gnome) and "adsl" in the QTNX config
.