The document discusses various Platform as a Service (PaaS) offerings, including Google App Engine. It provides an overview of PaaS, describing it as a category of cloud computing services that provides a computing platform and solution stack. Popular PaaS offerings mentioned include Heroku, Windows Azure, dotCloud, Cloud Foundry, Engine Yard, and Google App Engine. For each, it briefly outlines their key features and technologies.

1. GETTING
READY
FOR
THE
CLOUD
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2. Pla@orm
as
a
Service
-­‐
Google
App
Engine
Arun
Shanker
Prasad
February,
2013

3. Pla@orm
as
a
Service
(PaaS)
-­‐
What
is
it?
PaaS
is
a
category
of
cloud
compuCng
services
that
provide
a
compuCng
plaGorm
and
a
soluCon
stack
as
a
service.
Along
with
soPware
as
a
service
(SaaS)
and
infrastructure
as
a
service
(IaaS),
it
is
a
service
model
of
cloud
compuRng.
In
this
model,
the
consumer
creates
the
soPware
using
tools
and/or
libraries
from
the
provider/vendor.
The
consumer
also
controls
soPware
deployment
and
configuraRon
seVngs.
The
provider
provides
the
networks,
servers,
storage
and
other
services.
PaaS
offerings
facilitate
the
deployment
of
applicaRons
without
the
cost
and
complexity
of
buying
and
managing
the
underlying
hardware
and
soPware
and
provisioning
hosRng
capabiliRes.

4. PaaS
-­‐
Key
Features
• Services
to
develop,
test,
deploy,
host
and
maintain
applicaRons
in
the
same
integrated
development
environment
• Web-­‐based
management/administraRon
consoles
o Reducing
the
need
for
system
administraRon/dev
ops
o Resource
uRlizaRon
monitoring
capabiliRes
o Easily
idenRfy
bo[lenecks
• MulR-­‐tenant
architecture
• Certain
PaaS
offerings
a[empt
to
support
use
of
the
applicaRon
by
many
concurrent
users,
by
providing
concurrency
management,
scalability,
fail-­‐over
and
security
• Support
for
development
team
collaboraRon
• Pay
for
what
you
use
billing
model

5. Some
popular
PaaS
offerings

6. PaaS
-­‐
Popular
offerings
Heroku
• One
of
the
first
cloud
pla@orms,
has
been
in
development
since
June
2007,
when
it
supported
only
the
Ruby
programming
language,
but
has
since
added
support
for
Java,
Node.js,
Scala,
Clojure,
Python
and
(undocumented)
PHP
• Heroku
is
owned
by
Salesforce.com
• The
base
operaRng
system
is
Debian
or,
in
the
newest
stack,
the
Debian-­‐based
Ubuntu

7. PaaS
-­‐
Popular
offerings
Windows
Azure
• MicrosoP's
cloud
compuRng
pla@orm
used
to
build,
deploy
and
manage
applicaRons
through
a
global
network
of
MicrosoP-­‐
managed
datacenters
• Allows
for
applicaRons
to
be
built
using
many
different
programming
languages,
tools
or
frameworks
and
makes
it
possible
for
developers
to
integrate
their
public
cloud
applicaRons
in
their
exisRng
IT
environment
• Provides
both
Pla@orm
as
a
Service
(PaaS)
and
Infrastructure
as
a
Service
(IaaS)
services
and
is
classified
as
the
“Public
Cloud”
in
MicrosoP's
cloud
compuRng
strategy,
along
with
its
SoPware
as
a
Service
(SaaS)
offering,
MicrosoP
Online
Services

8. PaaS
-­‐
Popular
offerings
dotCloud
• Founded
in
2008
by
Solomon
Hykes,
dotCloud
is
the
first
applicaRon
pla@orm
designed
from
the
ground
up
for
modern
service-­‐oriented
development
• Enables
developers
and
IT
organizaRons
to
deploy,
manage
and
scale
their
applicaRons
with
unprecedented
ease
and
flexibility
by
assembling
and
customizing
powerful
pre-­‐configured
stacks
and
services
• Powerful
and
easy-­‐to-­‐use
command
line
script
• Configure
stack
using
a
simple
YAML
config
• Deploy
to
a
development
sandox
• Roll
live

9. PaaS
-­‐
Popular
offerings
Cloud
Foundry
• Developed
by
VMware
released
under
the
terms
of
the
Apache
License
2.0
• Primarily
wri[en
in
Ruby
• AppCloud
runs
on
Cloud
Foundry
• Since
it
is
open
sourced,
AcRveState
has
created
a
commercial
distribuRon
of
the
Cloud
Foundry
soPware
for
enterprises
to
host
their
own
private
PaaS

10. PaaS
-­‐
Popular
offerings
Engine
Yard
• A
San
Francisco,
California
based,
privately
held
pla@orm
as
a
service
company
focused
on
Ruby
on
Rails
and
PHP,
and
recently
announced
support
for
Node.js
deployment
and
management
• One
of
the
leading
PaaS
players
for
Ruby
on
Rails
and
PHP
developers
• Handles
all
the
details
of
pushing
the
applicaRon
to
the
cloud,
and
monitors
their
conRnued
operaRon
• SoluRons
are
charged
on
a
pay-­‐as-­‐you-­‐go
basis

11. PaaS
-­‐
Popular
offerings
Google
App
Engine
(oNen
referred
to
as
GAE
or
simply
App
Engine,
and
also
used
by
the
acronym
GAE/J)
• A
cloud
compuRng
pla@orm
for
developing
and
hosRng
web
applicaRons
in
Google-­‐managed
data
centers
• ApplicaRons
are
sandboxed
and
run
across
mulRple
servers
• Offers
automaRc
scaling
for
web
applicaRons—as
the
number
of
requests
increases
for
an
applicaRon,
App
Engine
automaRcally
allocates
more
resources
for
the
web
applicaRon
to
handle
the
addiRonal
demand
• Is
free
up
to
a
certain
level
of
consumed
resources.
Fees
are
charged
for
addiRonal
storage,
bandwidth,
or
instance
hours
required
by
the
applicaRon
• First
released
as
a
preview
version
in
April
2008,
and
came
out
of
preview
in
September
2011

12. More
on
Google
App
Engine

13. What
is
Google
App
Engine
Google
App
Engine
lets
you
run
web
applicaRons
on
Google's
infrastructure.
App
Engine
applicaRons
are
easy
to
build,
easy
to
maintain,
and
easy
to
scale
as
your
traffic
and
data
storage
needs
grow.
With
App
Engine,
there
are
no
servers
to
maintain:
You
just
upload
your
applicaRon,
and
it's
ready
to
serve
your
users.

14. The
ApplicaRon
Environment
Google
App
Engine
makes
it
easy
to
build
an
applicaRon
that
runs
reliably,
even
under
heavy
load
and
with
large
amounts
of
data.
App
Engine
includes
the
following
features;
• dynamic
web
serving,
with
full
support
for
common
web
technologies
• persistent
storage
with
queries,
sorRng
and
transacRons
• automaRc
scaling
and
load
balancing
• APIs
for
authenRcaRng
users
and
sending
email
using
Google
Accounts
• a
fully
featured
local
development
environment
that
simulates
Google
App
Engine
on
your
computer
Your
applicaRon
can
run
in
one
of
three
runRme
environments:
the
Go
environment,
the
Java
environment,
and
the
Python
environment,
which
gives
you
a
choice
of
Python
2.5
or
Python
2.7.

15. Why
App
Engine?
Pros
• Easy
to
Get
Started
• AutomaRc
Scalability
• The
Reliability,
Performance,
and
Security
of
Google's
Infrastructure
• Costs
less
• There
is
a
generous
free
usage
quota
and
you
only
pay
for
what
you
use
Cons
• Sandboxed
environment
limits
the
scope
of
your
applicaRon
• Although
we
can
pay
for
certain
addiRonal
resources,
there
are
some
that
have
a
hard
limit

16. Why
App
Engine?
TradiRonal
Way
• Write
your
code
• Configure
&
Deploy
Web
server
(Apache/Tomcat)
• Configure
&
Deploy
SQL
database
• Maintain
all
of
these
infrastructure
• Cost
of
building
and
maintaining
the
infrastructure
App
Engine
Way
• Write
your
code
• A
set
of
simple
configuraRons
to
let
App
Engine
know
how
to
serve
your
applicaRon
That's
it....

17. Tools
-­‐
Bundled
with
the
SDK
• Development
Server
• Uploading
and
Managing
an
App
• Uploading
and
Downloading
Data
• ProtoRPC
• webapp
Framework
• Local
Unit
TesRng
• Appstats
• Included
Libraries
(Python
2.5)
o Django,
PyCrypto,
YAML,
zipimport
• Included
Libraries(Python
2.7)
o Jinja2,
PIL,
webapp2,
etc

18. Services
(APIs)
• Channel
• Images
• Mail
• Memcache
• MulRtenancy
• OAuth
• ProspecRve
Search
• Search
• Task
Queues
• URL
Fetch
• Users
• XMPP

19. Services
(APIs)
• Blobstore
• App
IdenRty
• CapabiliRes
• LogService

20. Bigtable
-­‐
M/S
&
HR
Datastore
App
Engine
currently
has
two
database
offerings,
they
differ
on
the
basis
of
their
implementaRon
architecture;
• Master/Slave
(M/S)
o TradiRonal
(one
master/one
slave)
o Single
point
of
failure
o Deprecated
o Strong
Consistency
• High
ReplicaRon
(HR)
o High
performance
o No
single
point
of
failure
o Now
default
and
the
only
supported
one
o Eventual
Consistency
App
Engine
also
supports
a
SQL
database
Google
Cloud
Storage,
which
can
be
easily
be
linked
to
an
App
Engine
app

21. Pricing
App
Engine
has
three
pricing
modes
• Free
• Paid
• Premier
Paid
• $9/app/month
• Usage
based
pricing
• Infinetly
Scalable
• SLA
Premier
version
has;
• $500/account/month
• OperaRonal
Support

22. What
does
QBurst
do
with
App
Engine?
QBurst
has
built
a
suite
of
applicaRons
that
form
a
cloud
based
ERP
soluRon
called
Space
QBurst
had
a
team
of
engineers
developing
applicaRons
on
App
Engine
from
as
early
as
July
2008
We
were
one
of
the
first
people
to
get
approved
when
the
App
Engine
for
Java
was
released
as
an
invite
only
preview
We
have
applicaRons
deployed
on
Python
and
Java
environments,
and
are
experimenRng
with
Go

23. QuesRons?

24. Future Plans - 2012
Thank You !