:)
easy deployment
logs
reliability
versions
costs
scale

web sites

develop
? publish

s3restart vps
prefork
subversion
chown
rsync ftp
clustering
mod_python capacitylighttpd
replication php host
backup dump
rsh web
develop sh mysql card
credit ssh
master/slave
sharding apache
post-commit
sql chmod
dns memcached
scp balancing
publish
bash nginx
load

s3restart vps
prefork
subversion
chown
rsync ftp
clustering
mod_python capacitylighttpd
replication php host
backup dump
rsh web
develop sh mysql card
credit ssh
master/slave
sharding apache
post-commit
sql chmod
dns memcached
scp balancing
publish
bash nginx
load

deployment
s3restart vps
rsync ftp
prefork
chown
subversion
clustering
mod_python capacitylighttpd
replication php host
backup dump
rsh web
sh mysql card
credit ssh
master/slave
sharding apache
post-commit
sql chmod
dns memcached
scp balancing
bash nginx
load

develop publish

develop publish

Deploy

develop publish
Deploy

reliable

reliable

reliable &scalable

reliable &scalable

easy test sites

error reporting

freeeeeeeeeeee!

it’s here!

Deploy

Deploy

Deploy

:)

versions

logs

data viewer

scale!

big table

reliability

costs

$0

$0
up to “5 million views per month”

Storage GB/month 0.15 0.15
DB GB/month 0.15 1.50
Transfer GB 0.9–0.13 0.10–0.17
Requests 5m 0 5–50
CPU hour 0.10–0.12 0.14 + 0.10–0.80

Storage GB/month 0.15 0.15
DB GB/month 0.15 1.50
Transfer GB 0.9–0.13 0.10–0.17
Requests 5m 0 5–50
CPU hour 0.10–0.12 0.14 + 0.10–0.80

Storage GB/month 0.15 0.15
DB GB/month 0.15 1.50
Transfer GB 0.9–0.13 0.10–0.17
Requests 5m 0 5–50
CPU hour 0.10–0.12 0.14 + 0.10–0.80

Storage GB/month 0.15 0.15
DB GB/month 0.15 1.50
Transfer GB 0.9–0.13 0.10–0.17
Requests 5m 0 5–50
CPU hour 0.10–0.12 0.14 + 0.10–0.80

Storage GB/month 0.15 0.15
DB GB/month 0.15 1.50
Transfer GB 0.9–0.13 0.10–0.17
Requests 5m 0 5–50
CPU hour 0.10–0.12 0.14 + 0.10–0.80

Storage GB/month 0.15 0.15
DB GB/month 0.15 1.50
Transfer GB 0.9–0.13 0.10–0.17
Requests 5m 0 5–50
CPU hour 0.10–0.12 0.14 + 0.10–0.80

Storage GB/month 0.15 0.15
DB GB/month 0.15 1.50
Transfer GB 0.9–0.13 0.10–0.17
Requests 5m 0 5–50
CPU hour 0.10–0.12 0.14 + 0.10–0.80

Storage GB/month 0.15 0.15
DB GB/month 0.15 1.50
Transfer GB 0.9–0.13 0.10–0.17
Requests 5m 0 5–50
CPU hour 0.10–0.12 0.14 + 0.10–0.80

Storage GB/month 0.15 0.15
DB GB/month 0.15 1.50
Transfer GB 0.9–0.13 0.10–0.17
Requests 5m 0 5–50
CPU hour 0.10–0.12 0.14 + 0.10–0.80

Storage GB/month 0.15 0.15
DB GB/month 0.15 1.50
Transfer GB 0.9–0.13 0.10–0.17
Requests 5m 0 5–50
CPU hour 0.10–0.12 0.14 + 0.10–0.80

Storage GB/month 0.15 0.15
DB GB/month 0.15 1.50
Transfer GB 0.9–0.13 0.10–0.17
Requests 5m 0 5–50
CPU hour 0.10–0.12 0.14 + 0.10–0.80

Storage GB/month 0.15 0.15
DB GB/month 0.15 1.50
Transfer GB 0.9–0.13 0.10–0.17
Requests 5m 0 5–50
CPU hour 0.10–0.12 0.14 + 0.10–0.80

Storage GB/month 0.15 0.15
DB GB/month 0.15 1.50
Transfer GB 0.9–0.13 0.10–0.17
Requests 5m 0 5–50
CPU hour 0.10–0.12 0.14 + 0.10–0.80

Storage GB/month 0.15 0.15
DB GB/month 0.15 1.50
Transfer GB 0.9–0.13 0.10–0.17
Requests 5m 0 5–50
CPU hour 0.10–0.12 0.14 + 0.10–0.80

Storage GB/month 0.15 0.15
DB GB/month 0.15 1.50
Transfer GB 0.9–0.13 0.10–0.17
Requests 5m 0 5–50
CPU hour 0.10–0.12 0.14 + 0.10–0.80

Storage GB/month 0.15 0.15
DB GB/month 0.15 1.50
Transfer GB 0.9–0.13 0.10–0.17
Requests 5m 0 5–50
CPU hour 0.10–0.12 0.14 + 0.10–0.80
cheap!

:)
easy deployment
logs
reliability
versions
costs
scale

:(

quotas

Storage per App 500MB
Emails per Day 2,000
Bandwidth per Day 10 GB/10 GB
CPU Megacycles per Day 200m
Requests per Day 650,000
DB Queries per Day 2.5m
External HTTP requests per Day 160,000

file limits

Files per App 1000
Size per file 1MB

profiling

subdomains

subdomains
twitter-downtime.zipiko.com

subdomains
twitter-downtime.zipiko.com

SSL

SSL
https://zipiko.com/

SSL
https://zipiko.com/

custom
errors

custom
errors

custom
errors

custom
errors

data store

data store
not relational

data store
not relational
“kinda” like an object db

the data store
is your
MOM

MOM
“don’t do joins,
they’re bad for you!”

MOM
“no more
(http) cookies
for you!”

LOCK-IN

:(
file limits data viewer
subdomains lock-in
data store is your mom
custom server errors
profiling ssl quotas

Tips

shell
shell.appspot.com

use the key,
Luke!

class Article(db.Model):
title = db.StringProperty()
slug = db.StringProperty()

class Article(db.Model):
title = db.StringProperty()
slug = db.StringProperty()
Article(title='Hello, world!', slug='hello-world').put()

class Article(db.Model):
title = db.StringProperty()
slug = db.StringProperty()
Article(title='Hello, world!', slug='hello-world').put()

class Article(db.Model):
title = db.StringProperty()
slug = db.StringProperty()
Article(title='Hello, world!', slug='hello-world').put()
Article.get_or_insert(
key_name='hello-world',
title='Hello, world!').put()

many-to-many

class User(db.Model):
name = db.StringProperty()
email = db.StringProperty()

class User(db.Model): class Group(db.Model):
name = db.StringProperty() name = db.StringProperty()
email = db.StringProperty()

class User(db.Model): class Group(db.Model):
name = db.StringProperty() name = db.StringProperty()
email = db.StringProperty()
class Membership(db.Model):
user = db.ReferenceProperty(User)
group = db.ReferenceProperty(Group)

class User(db.Model): class Group(db.Model):
name = db.StringProperty() name = db.StringProperty()
email = db.StringProperty()
class Membership(db.Model):
user = db.ReferenceProperty(User)
group = db.ReferenceProperty(Group)
Membership(user=bart, group=simpsons).put()

class User(db.Model): class Group(db.Model):
name = db.StringProperty() name = db.StringProperty()
email = db.StringProperty()
class Membership(db.Model):
user = db.ReferenceProperty(User)
group = db.ReferenceProperty(Group)
Membership(user=bart, group=simpsons).put()

class User(db.Model): class Group(db.Model):
name = db.StringProperty() name = db.StringProperty()
email = db.StringProperty()
class Membership(db.Model):
user = db.ReferenceProperty(User)
group = db.ReferenceProperty(Group)
Membership(user=bart, group=simpsons).put()
Membership.get_or_insert(
key_name='%s-%s' % (bart.key(), simpsons.key()),
user=bart,
group=simpsons).put()

denormalize

class Membership(db.Model):
user = db.ReferenceProperty(User)
group = db.ReferenceProperty(Group)

class Membership(db.Model):
user = db.ReferenceProperty(User)
group = db.ReferenceProperty(Group)
[m.group for m in bart.membership_set]

class Membership(db.Model):
user = db.ReferenceProperty(User)
group = db.ReferenceProperty(Group)
[m.group for m in bart.membership_set]

class Membership(db.Model):
user = db.ReferenceProperty(User)
group = db.ReferenceProperty(Group)
group_name = db.StringProperty()
!
def put(self):
self.group_name = self.group.name
super(Membership, self).put()
[m.group for m in bart.membership_set]

class Membership(db.Model):
user = db.ReferenceProperty(User)
group = db.ReferenceProperty(Group)
group_name = db.StringProperty()
!
def put(self):
self.group_name = self.group.name
super(Membership, self).put()
[m.group for m in bart.membership_set]
[m.group for m in bart.membership_set.order('group_name')]

cache

cache
memcached

scheduled tasks

scheduled tasks
Use cron+curl on another server

scheduled tasks
Use cron+curl on another server
Use a monitoring service

zip your code

zip your code
Python can import zips with zipimport

zip your code
Python can import zips with zipimport
Pytz has a zoneinfo database which can be zipped

profiling

bart.membership_set.fetch(100)

bart.membership_set.fetch(100)

bart.membership_set.fetch(100)
fetch(bart.membership_set, 100)

bart.membership_set.fetch(100)
fetch(bart.membership_set, 100)
def fetch(set, limit=100):
t1 = time.time()
result = set.fetch(limit)
t2 = time.time()
logging.debug(‘Query took %d: %s’ %
(t2-t1,
traceback.format_stack())
return result

purge indexes

index.yaml

index.yaml
# appcfg.py vacuum_indexes .

use versions!

avoid lock-in

use

use
code.google.com/p/google-app-engine-django/

:(
file limits data viewer
subdomains lock-in
data store is your mom
custom server errors
profiling ssl quotas

:(
z port
file limits
ipim data viewer
subdomains lock-in
data store is your mom
custom server errors
profiling ssl quotas

:(
port
file limits sheviewer
data ll
zipim
subdomains lock-in
data store is your mom
custom server errors
profiling ssl quotas

:(
port
file limits sheviewer
data ll
zipim
subdomains
redirect lock-in
data store is your mom
custom server errors
profiling ssl quotas

:(
port
file limits sheviewer
data ll
zipim
subdomains
redirect lock-in
django
data store is your mom
custom server errors
profiling ssl quotas

:(
port
file limits sheviewer
data ll
zipim
subdomains
redirect lock-in
django
denorstore e your mom
data malizis
custom server errors
profiling ssl quotas

:(
port
file limits sheviewer
data ll
zipim
subdomains
redirect lock-in
django
denorstore ebe scalable
data malizis your mom
custom server errors
profiling ssl quotas

:(
port
file limits sheviewer
data ll
zipim
subdomains
redirect lock-in
django
denorstore ebe scalable
data malizis your mom
custom server errors
our own ssl
profiling
do y quotas

:(
port
file limits sheviewer
data ll
zipim
subdomains
redirect lock-in
django
denorstore ebe scalable
data malizis your mom
custom server errors
our own ssl
profiling
do y quotas

:(
port
file limits sheviewer
data ll
zipim
subdomains
redirect lock-in
django
denorstore ebe scalable
data malizis your mom
custom server errors
our own ssl
profiling
do y quotas

:(
port
file limits sheviewer
data ll
zipim
subdomains
redirect lock-in
django
denorstore ebe scalable
data malizis your mom
custom server errors
our own ssl quotas
profiling
do y
python

:)
easy deployment
logs
reliability
versions
costs
scale

:)
easy deployment
logs
reliability
versions
costs
scale

:)
easy deployment
logs
reliability
versions
costs
scale
thank you.

Stefano J. Attardi
attardi.org

zipiko.com