vasanthk

System Design Cheatsheet

Picking the right architecture = Picking the right battles + Managing trade-offs

Basic Steps

1. Clarify and agree on the scope of the system

• User cases (description of sequences of events that, taken together, lead to a system doing something useful)
  • Who is going to use it?
  • How are they going to use it?

joemiller

# Helper script to turn a single monolithic WHISPER_DIR into one that is
# allocated based on the shard id (carbon-cache instance name)
#
# Take a single WHISPER_DIR such as '/opt/graphite/storage/whisper' and
# figure out how to divide them up into shards based on the given list of
# carbon-cache shard instances and replication_factor
#
# The output will be multiple text files that can be used with `rsync --files-from=`
# to copy the right .wsp files to the correct nodes.
#

Moqume

GARBD_ADDRESS="gcomm://192.168.1.2"
GARBD_GROUP="my_snazzy_cluster"

nikcub

In August 2007 a hacker found a way to expose the PHP source code on facebook.com. He retrieved two files and then emailed them to me, and I wrote about the issue:

http://techcrunch.com/2007/08/11/facebook-source-code-leaked/

It became a big deal:

http://www.techmeme.com/070812/p1#a070812p1

The two files are index.php (the homepage) and search.php (the search page)

rcrowley

import os
import os.path
import sys

from graphite.render.hashing import ConsistentHashRing

instances = []
unwelcome_instances = []
for arg in sys.argv[1:]:
    unwelcome = False