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case 2 and some stats

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Oskar Thoren 2019-10-16 13:13:30 +08:00
parent b7a97e977f
commit 092a749e43
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1 changed files with 76 additions and 23 deletions
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whisper_scalability/whisper.py
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@ -8,8 +8,21 @@ class bcolors:
BOLD = '\033[1m' BOLD = '\033[1m'
UNDERLINE = '\033[4m' UNDERLINE = '\033[4m'
# https://web.archive.org/web/20111010015624/http://blogmag.net/blog/read/38/Print_human_readable_file_size
def sizeof_fmt(num):
for x in ['bytes','KB','MB','GB','TB']:
if num < 1024.0:
return "%.0f%s" % (num, x)
num /= 1024.0
def magnitude_fmt(num):
for x in ['','k','m']:
if num < 1000:
return "%d%s" % (num, x)
num /= 1000
# We assume an envelope is 1kb # We assume an envelope is 1kb
envelope_size = 1 envelope_size = 1024
# 100, 10k, 1m - jumping two orders of magnitude # 100, 10k, 1m - jumping two orders of magnitude
n_users = 10000 n_users = 10000
@ -47,29 +60,69 @@ def bandwidth_usage(n_users):
# Offline proportion # Offline proportion
# Case 1: only receiving messages meant for you
load = envelope_size * envelopes_per_message * \
received_messages_per_day
if load < 10000: def case1():
color_level = bcolors.OKBLUE # Case 1: only receiving messages meant for you
elif load < 30000: load = envelope_size * envelopes_per_message * \
color_level = bcolors.OKGREEN received_messages_per_day
elif load < 100000:
color_level = bcolors.WARNING
else:
color_level = bcolors.FAIL
print bcolors.HEADER + "Case 1. Only receiving messages meant for you" + bcolors.ENDC if load < (1024 * 1000 * 10):
print "" color_level = bcolors.OKBLUE
print "Assumptions:" elif load < 30000:
print "- A1. Envelope size (static): " + str(envelope_size) + "kb" color_level = bcolors.OKGREEN
print "- A2. Envelopes / message (static): " + str(envelopes_per_message) elif load < 100000:
print "- A3. Received messages / day (static): " + str(received_messages_per_day) color_level = bcolors.WARNING
print "" else:
print color_level + "Receiving bandwidth is " + str(load/1000) + "mb/day" + bcolors.ENDC color_level = bcolors.FAIL
print ""
# Case 2: receiving all messages print bcolors.HEADER + "\nCase 1. Only receiving messages meant for you" + bcolors.ENDC
print ""
print "Assumptions:"
print "- A1. Envelope size (static): " + str(envelope_size) + "kb"
print "- A2. Envelopes / message (static): " + str(envelopes_per_message)
print "- A3. Received messages / day (static): " + str(received_messages_per_day)
print "- A4. Only receiving messages meant for you"
print ""
print color_level + "For N users, receiving bandwidth is " + sizeof_fmt(load) + "/day" + bcolors.ENDC
print ""
print("------------------------------------------------------------")
# print bcolors.WARNING + "Warning: No active frommets remain. Continue?" + bcolors.ENDC def case2():
# Case 2: receiving all messages
def load_users(n_users):
return envelope_size * envelopes_per_message * \
received_messages_per_day * n_users
def color(n_users):
load = load_users(n_users)
if load < 10000:
color_level = bcolors.OKBLUE
elif load < 30000:
color_level = bcolors.OKGREEN
elif load < 100000:
color_level = bcolors.WARNING
else:
color_level = bcolors.FAIL
return color_level
def usage_str(n_users):
return color(n_users) + "For " + magnitude_fmt(n_users) + " users, receiving bandwidth is " + sizeof_fmt(load_users(n_users)) + "/day" + bcolors.ENDC
print bcolors.HEADER + "\nCase 2. Receiving messages for everyone" + bcolors.ENDC
print ""
print "Assumptions:"
print "- A1. Envelope size (static): " + str(envelope_size) + "kb"
print "- A2. Envelopes / message (static): " + str(envelopes_per_message)
print "- A3. Received messages / day (static): " + str(received_messages_per_day)
print "- A4. Received messages for everyone"
print ""
print usage_str(100)
print usage_str(100 * 100)
print usage_str(100 * 100 * 100)
print ""
print("------------------------------------------------------------")
case1()
case2()