jayjanssen

SELECT db, tbl, SUM(this_cnt) AS total_rows, COUNT(*) AS chunks
FROM percona.checksums, information_schema.tables
WHERE 
	percona.checksums.db=information_schema.tables.TABLE_SCHEMA AND
	percona.checksums.tbl=information_schema.tables.TABLE_NAME AND
	information_schema.tables.ENGINE != 'MEMORY' AND
	percona.checksums.db='myDB' AND
(
 master_cnt <> this_cnt
 OR master_crc <> this_crc

aristus

import math,re

# binary "oodles of magnitude"
KB = 2 ** 10
MB = 2 ** 20
GB = 2 ** 30
TB = 2 ** 40
PB = 2 ** 50

# decimal "oodles of magnitude"

tlockney

What questions would you put on a phone screen for a distributed systems position?

These come from @tsantero with the last two additions being curteousy of @ifesdjeen in reply to this question from @SeanTAllen.

1. explain the life of an http request.
2. what does the FLP result teach us?
3. what is a byzantine failure?
4. explain CRDTs
5. explain linearizability.
6. how does DNS work?

lichengwu

#list all changed flags
-XX:+PrintCommandLineFlags

#list all changeable flags and final default values
-XX:+PrintFlagsFinal
         
#list all changeable flags and initial default values
-XX:+PrintFlagsInitial

eg:

mopemope

core@coreos-local ~ $ ./nspawn-container jmatis/tomcat7 "/opt/start-watch-tomcat.sh"
Pulling repository jmatis/tomcat7
b3dfa5e5f738: Download complete 
511136ea3c5a: Download complete 
5e66087f3ffe: Download complete 
4d26dd3ebc1c: Download complete 
d4010efcfd86: Download complete 
99ec81b80c55: Download complete 
c17d434dd941: Download complete 
180579a76826: Download complete 

danikin

// Tarantool quick test
// Copyright, Dennis Anikin 2016
//
// Quick disclaimer:
//
// This test shows 500K-1000K transactions per second on one CPU core
// and 600K-1600K queries per second on one CPU core.
//
// Based on the $6.57 per-month-price for the AWS t2.micro instance we can afford the tremendous number of 630bln queries for just $1
//

iamralch

package main

import (
	"bufio"
	"fmt"
	"os"
	"strings"
	"time"

	"golang.org/x/net/context"

jamesls

import os
import time
import sqlite3
import threading


conn = None


def create_table():

gist:2523336

#!/bin/sh

git filter-branch --env-filter '

an="$GIT_AUTHOR_NAME"
am="$GIT_AUTHOR_EMAIL"
cn="$GIT_COMMITTER_NAME"
cm="$GIT_COMMITTER_EMAIL"

if [ "$GIT_COMMITTER_EMAIL" = "your@email.to.match" ]

jasonrudolph

About

This gist is a collection of my rough notes from Strange Loop 2012.

@jasonrudolph on Twitter | @jasonrudolph on GitHub

Did I Mention That They're Rough?