antirez

def buildHuffmanCode(ftab)
    if ftab.length == 1
        ftab
    else
        ftab = ftab.sort {|a,b| a[0] <=> b[0]}
        left = ftab[0]
        right = ftab[1]
        freq = left[0]+right[0]
        left = left[1].map{|x| x.merge({:code => "0"+x[:code]})}
        right = right[1].map{|x| x.merge({:code => "1"+x[:code]})}

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# Build an inverted index for a full-text search engine with Redis.
# Copyright (C) 2009 Salvatore Sanfilippo. Under the BSD License.
# USAGE:
#
# ruby invertedindex.rb add somedir/*.c
# ruby invertedindex.rb add somedir/*.txt
# ruby search your query string

require 'rubygems'
require 'redis'

antirez

#!/bin/sh

PIDFILE=/var/run/redis_6379.pid
EXEC=/usr/local/bin/redis-server
CONF="/etc/redis/6379.conf"
REDISPORT=6379

case "$1" in
    start)
        if [ -f $PIDFILE ]

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require 'rubygems'
require 'redis'

def main(opts={})
    r = Redis.new(opts)
    um = 0
    while true do
        newum = r.info[:used_memory]
        if newum != um && um != 0
            diff = newum.to_i-um.to_i

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% ssh -v -i ~/.ssh/DinamicheRosaKeyPair.pem root@79.125.10.167
OpenSSH_5.2p1, OpenSSL 0.9.8k 25 Mar 2009
debug1: Reading configuration data /etc/ssh_config
debug1: Connecting to 79.125.10.167 [79.125.10.167] port 22.
debug1: Connection established.
debug1: identity file /Users/antirez/.ssh/DinamicheRosaKeyPair.pem type -1
debug1: Remote protocol version 2.0, remote software version OpenSSH_5.1p1 Debian-5ubuntu1
debug1: match: OpenSSH_5.1p1 Debian-5ubuntu1 pat OpenSSH*
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_5.2

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SET: 44318.59 requests per second
GET: 44149.78 requests per second
INCR: 46328.70 requests per second
LPUSH: 45325.79 requests per second
LPOP: 44466.67 requests per second
PING: 44287.61 requests per second

antirez

# Power law (log tail) distribution
# Copyright(C) 2010 Salvatore Sanfilippo
# this code is under the public domain

# min and max are both inclusive
# n is the distribution power: the higher, the more biased
def powerlaw(min,max,n)
    max += 1
    pl = ((max**(n+1) - min**(n+1))*rand() + min**(n+1))**(1.0/(n+1))
    (max-1-pl.to_i)+min

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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <limits.h>
#include <math.h>

unsigned long longtailprng(unsigned long min, unsigned long max, int n) {
    unsigned long pl;
    double r = (double)(random()&(INT_MAX-1))/INT_MAX;

antirez

Usage: redis-load ... options ...

 host <hostname>      Server hostname (default 127.0.0.1)
 port <hostname>      Server port (default 6379)
 clients <clients>    Number of parallel connections (default 50)
 requests <requests>  Total number of requests (default 10k)
 writes <percentage>  Percentage of writes (default 50, that is 50%)
 mindatasize <size>   Min data size of SET values in bytes (default 1)
 maxdatasize <size>   Min data size of SET values in bytes (default 64)
 datasize <size>      Set both min and max datasize to the same value

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0        0        8335332  0         134.01M  0B       
0        0        8335332  0         134.01M  0B       
1272     0        8311296  -24036    134.11M  103.34K  
2631     19       8261737  -49559    136.88M  2.77M    
224      217      8309262  47525     137.10M  223.38K  
89       905      8307781  -1481     136.73M  -379.72K 
359      1043     8324603  16822     135.72M  -1.01M   
293      1538     8319361  -5242     135.35M  -382.36K 
731      1045     8322341  2980      135.00M  -352.77K 
1030     679      8312372  -9969     134.87M  -131.05K