ciatph ciatph

System Design Cheatsheet

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

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?

	# auto detects a good number of processes to run
	worker_processes auto;

	#Provides the configuration file context in which the directives that affect connection processing are specified.
	events {
	# Sets the maximum number of simultaneous connections that can be opened by a worker process.
	worker_connections 8000;
	# Tells the worker to accept multiple connections at a time
	multi_accept on;
	}

	# extracted from http//www.naturalearthdata.com/download/110m/cultural/ne_110m_admin_0_countries.zip
	# under public domain terms

	country_bounding_boxes = {
	'AF': ('Afghanistan', (60.5284298033, 29.318572496, 75.1580277851, 38.4862816432)),
	'AO': ('Angola', (11.6400960629, -17.9306364885, 24.0799052263, -4.43802336998)),
	'AL': ('Albania', (19.3044861183, 39.624997667, 21.0200403175, 42.6882473822)),
	'AE': ('United Arab Emirates', (51.5795186705, 22.4969475367, 56.3968473651, 26.055464179)),
	'AR': ('Argentina', (-73.4154357571, -55.25, -53.628348965, -21.8323104794)),
	'AM': ('Armenia', (43.5827458026, 38.7412014837, 46.5057198423, 41.2481285671)),