The document discusses the concept of multi-tenancy in cloud computing, specifically within Google App Engine and SaaS, highlighting its benefits such as cost reduction and innovation potential. It addresses different levels of multi-tenancy, the challenges it presents, and the importance of infrastructure efficiency and security. Additionally, it offers insights on when to avoid multi-tenancy, such as in situations requiring high customization and tight integration.

1. Multi-tenancy in the Cloud
and
Google App Engine

2. 'SaaS' is a reality

3. multi-tenancy

4. multi-instance

5. it is not multi-instance

6. maturity

7. level of multi-tenancy

8. multi-tenancy in clouds

9. why it matters in the cloud
sell monthly or annual per seat subscription
fraction as compared to onsite
reduce operating cost
manage more with less
more money gives more room to innovate

10. should SaaS always be
multitenant ?

11. is it a prerequisite for Cloud
Computing?

12. coarse grained multi-tenancy

13. fine grained multi-tenancy

14. fine grained database

15. challenges
complexity
cost

16. challenges
elasticity challenge

17. it is so damn hard!

18. solution
take a step back to the history
DOS

19. lesson learnt
deal with the infrastructure

20. elastic middle-ware
service physical
resource
service abstraction

21. dealing with infrastructure
efficiency
simplicity
dynamic scaling
sharing level

22. where are we?

23. google approach
sdk 1.3.6 - namespaces api
Namespace enabled APIs
Datastore, Memcache, Task Queue, Bulk Loader
(x)Blobstore (x)UrlFetch

24. application level namespace
1
2

25. Inphina.bookmyhours.com
Amazon.bookmyhours.com

26. user level namespace

27. concerns
Security, data leaks
impact of other clients
no I can pay, make me special
being forced into an upgrade
configurations / customizations to a level
user acceptance testing?
live date, what’s that?

28. when not to go multi-tenant
not comfortable with security
high customization and tight integration
workload does not run in VM

29. references

30. contact us
vhazrati@inphina.com
http://www.inphina.com
http://thoughts.inphina.com