willkelly

traverseDAG Performance Fix

Problem

CPU pegging at 100% when displaying many charms (7+) due to excessive traverseDAG calls. The system was making 18,623 traversal calls to traverse only 338 unique objects - a 55x repetition factor.

Root Cause: The Diamond Problem

CharmA ──→ SharedDocX

willkelly

HELLO

There is only one proper irc setup. Many people will tell you to use a bouncer. These people area silly and wrongheaded folk whose brains are filled with stupid ideas about irc. Let me explain.

What, exactly, is a bouncer? I will tell you! An irc bouncer is an irc client that is written in an irc server. Should you choose to use a bouncer, you will need an irc client to connect to your irc client.

willkelly

$ rustc main.rs 
main.rs:7:21: 7:29 error: unable to infer enough type information about `_`; type annotations required [E0282]
main.rs:7    let f = identity(identity);
                              ^~~~~~~~
error: aborting due to previous error

willkelly

#!/usr/bin/python

# apt-get install python-pip cgroup-bin
# pip install cgroups

import cgroups
import os
import time
import subprocess

willkelly

DEBIAN_FRONTEND=noninteractive apt-get install -y mdadm
mdadm -C -l0 --raid-devices=2 /dev/md0 /dev/xvdb /dev/xvdc
mkfs.ext4 /dev/md0
perl -pi -e 's@/dev/xvdb@/dev/md0@g' /etc/fstab
mount -a
#if [[ -d /var/lib/elasticsearch ]]; then
#  mv /var/lib/elasticsearch /mnt/elasticsearch
#else
#  mkdir /mnt/elasticsearch
#  ln -sf /mnt/elasticsearch /var/lib/elasticsearch

willkelly

What is Aptly

Aptly is software for managing apt repositories.

Features we use

• Quick package addition / removal.

willkelly

from sqlalchemy import create_engine, Column, Integer
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy.orm import sessionmaker

Base = declarative_base()

engine = create_engine('postgresql+psycopg2://testman:testmanpass@localhost:5432/testman')

class TestMan(Base):
    __tablename__ = "testman"

willkelly

from sqlalchemy import create_engine, Column, Integer
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy.orm import sessionmaker

Base = declarative_base()

engine = create_engine('postgresql+psycopg2://testman:testmanpass@localhost:5432/testman')

class TestMan(Base):
    __tablename__ = "testman"

willkelly

import sqlite3

con = sqlite3.connect("/dev/input")
cursor = con.cursor()
cursor.execute("Select name from object")
print "\n".join([item[0] for item in cursor.fetchall()])

willkelly

def zebra_execute(json, endpoint, token):
    return requests.post(
        endpoint,
        headers={
            "X-Auth-Token": token,
            "Content-Type": "application/json",
            "X-ZeroVM-Execute": "1.0"},
        data=json).content