nmmmnu

    items {
        dl { name => DELL6400,  keyword:1 => computer, keyword:2 => DELL, keyword:3 => topseller  }
        hp { name => HP12345,   keyword:1 => computer, keyword:2 => HP    }
        no { name => Nokia8210, keyword:1 => phone,    keyword:2 => NOKIA }
    }

    // here I store keys of the items only,
    // in reality I have denormalized most of items columns
    keywords{
        computer  { webpage => www.domain.com/computer , item:dl => dl , item:hp => hp }

nmmmnu

in CLI:

create column family a 
with column_type = 'Standard' and 
   comparator = 'IntegerType' and
   default_validation_class = 'UTF8Type' and
   key_validation_class = 'IntegerType';

=======================

nmmmnu

#include <stdio.h>
#include <stdlib.h>
#include <signal.h>
#include <sys/time.h>

//#define DEBUG

//Default livetime is 1:30
#define LIVETIME 90

nmmmnu

Options for implementing HLL without read before write.

What I need:

I generally need something like grid / two dimentional array.

There will be 64, 128, 256, 512, 1024 grid "X" coordinate and 256 (because 1 byte can store 0-255 as value) grid "Y" coordinate.

There will be no value, but I can store there "1" (because we use PHP and it requires some value),
we can also store the byte value, in order to read data easier.

nmmmnu

"""
Simple Linear Probabilistic Counters

Credit for idea goes to:
http://highscalability.com/blog/2012/4/5/big-data-counting-how-to-count-a-billion-distinct-objects-us.html
http://highlyscalable.wordpress.com/2012/05/01/probabilistic-structures-web-analytics-data-mining/

Installation:
    pip install smhasher
    pip install bitarray

nmmmnu

<?

function multiplicate2($a, $b){
	printf("%16b x %b\n%16b\n", $a, $b, $a * $b);
}

function multiplicate($a, $b){
	printf("%1s %32d x %8d = %d\n", "", $a, $b, $a * $b);
	printf("%1s %32b x %8b\n", "", $a, $b);

nmmmnu

#include <stdlib.h>
#include <stdio.h>


/*
 * Base class. It defines int area() method.
 * The class is abstract so we did not made constructor.
 * Calling the area() method will probably core dump.
 */

nmmmnu

$ php
<?
error_reporting(E_ALL);

$a = 5 / 0;

var_dump($a);

<ctrl-d>

nmmmnu

#include <stdio.h>

#define MAX	2000000000

//#define IMPL	0

int do_loop(int max);

int main(){
	printf("%d\n", do_loop(MAX) );

nmmmnu

var fs = require('fs');
var Q = require("q");

/*
Q.all(
	[
		Q.ninvoke(fs, "readFile", "/etc/hosts", "utf8")
	]
)
*/