mattweber

Use extractDocs.py to parse and index the StackOverflow posts.xml file into an existing index.
 
Usage: extractDocs.py [options] file
 
Options:
  -h, --help            show this help message and exit
  -s SERVER, --server=SERVER
                        ElasticSearch Server
  -i INDEX, --index=INDEX
                        Index name to use

selenamarie

You are now connected to database "postgres" as user "postgres".
postgres:5432# create table birds (bird_info json);
CREATE TABLE   
Time: 162.227 ms
postgres:5432# insert into birds VALUES( '{"name": "scrubjay", "where": "my backyard", "when": "2013-05-24"}');
INSERT 0 1
Time: 0.616 ms 
postgres:5432# select * from birds;
                             bird_info
--------------------------------------------------------------------

stevearc

#!/usr/bin/env python
"""
This is a cute little script for easily running shell commands across many
servers using salt.


Copyright (c) 2013 Steven Arcangeli

Permission is hereby granted, free of charge, to any person obtaining a copy of
this software and associated documentation files (the "Software"), to deal in

garystafford

#!/bin/sh

# size of swapfile in megabytes
swapsize=512

# does the swap file already exist?
grep -q "swapfile" /etc/fstab

# if not then create it
if [ $? -ne 0 ]; then

rb2k

// Check if a slave has < 10 GB of free space, wipe out workspaces if it does

import hudson.model.*;
import hudson.util.*;
import jenkins.model.*;
import hudson.FilePath.FileCallable;
import hudson.slaves.OfflineCause;
import hudson.node_monitors.*;

for (node in Jenkins.instance.nodes) {

jberkus

WITH btree_index_atts AS (
    SELECT nspname, relname, reltuples, relpages, indrelid, relam,
        regexp_split_to_table(indkey::text, ' ')::smallint AS attnum,
        indexrelid as index_oid
    FROM pg_index
    JOIN pg_class ON pg_class.oid=pg_index.indexrelid
    JOIN pg_namespace ON pg_namespace.oid = pg_class.relnamespace
    JOIN pg_am ON pg_class.relam = pg_am.oid
    WHERE pg_am.amname = 'btree'
    ),

mbanck

WITH btree_index_atts AS (
    SELECT nspname, relname, reltuples, relpages, indrelid, relam,
        regexp_split_to_table(indkey::text, ' ')::smallint AS attnum,
        indexrelid as index_oid
    FROM pg_index
    JOIN pg_class ON pg_class.oid=pg_index.indexrelid
    JOIN pg_namespace ON pg_namespace.oid = pg_class.relnamespace
    JOIN pg_am ON pg_class.relam = pg_am.oid
    WHERE pg_am.amname = 'btree'
    ),

ashrithr

Installing Kerberos on Redhat 7

This installation is going to require 2 servers one acts as kerberos KDC server and the other machine is going to be client. Lets assume the FQDN's are (here cw.com is the domain name, make a note of the domain name here):

• Kerberos KDC Server: kdc.cw.com
• Kerberos Client: kclient.cw.com

Important: Make sure that both systems have their hostnames properly set and both systems have the hostnames and IP addresses of both systems in

brendangregg

F1. FS 128k streaming writes

Benchmark: fio write

Command: fio --name=seqwrite --rw=write --bs=128k --size=4g --end_fsync=1 --loops=4 # aggrb tput

Rationale: Measure the performance of a single threaded streaming write of a reasonably large file. The aim is to measure how well the file system and platform can sustain a write workload, which will depend on how well it can group and dispatch writes. It's difficult to benchmark buffered file system writes in both a short duration and in a repeatable way, as performance greatly depends on if and when the pagecache begins to flush dirty data. As a workaround, an fsync() at the end of the benchmark is called to ensure that flushing will always occur, and the benchmark also repeats four times. While this provides a much more reliable measurement, it is somewhat worst-case (applications don't always fsync), providing closer to a minimum rate – rather than a maximum rate – that you should expect.

F2. FS cached 4k random reads

dasjoe

; global parameters
[global]
fallocate=none
directory=/tank/bench
bs=4k-128k
size=16g
end_fsync=1
loops=1
rwmixread=70
;buffer_compress_percentage=0