Back2Cloud: Remote Backup Service

1. Back2Cloud: Remote Backup Service AmitWarke Jerry Philip Lateef Yusuf SuprajaNarasimhan

2. Outline • Motivation • Cloud Computing • Amazon S3( Simple Storage Service) • Architecture • Back2Cloud Features • Performance Benchmarks • Future Work and Challenges

3. Motivation • Having your own backup plan requires significant investment in infrastructure such as hardware, software and training. • Local backup systems are susceptible to various kinds of failures such as server crashes, virus attacks and human errors leading to loss of data. • Remote backups are easy to implement: only client side software required. • Remote backups more secure than local backup systems. • Quick file restore: data available 24 hours a day – 7 days a week • Remote backup require an internet connection and can be accessed from anywhere in the world with the help of a mobile device to restore data.

4. Cloud Computing Service Consumers DatacenterInfrastructure AccessServices Monitor & ManageServices & Resources IT Cloud Component Vendors/Software Publishers Service Catalog, ComponentLibrary CloudAdministrator Publish & UpdateComponents, Service Templates • Cloud Computing: refers to both applications delivered as services over the internet and hardware and systems software in data centers that provide these services. • The datacenter hardware and software is what we call cloud

5. Why cloud and its spectrum • They provide the illusion of computing resources available on demand: eliminating under-provisioning and over-provisioning • Elimination of an up-front commitment by cloud users: increase resources on an on-demand basis. Lower-level, Less management Higher-level, More management Amazon Azure AppEngine

6. Amazon Simple Storage Service (S3) • Distributed Data Storage service. It has a highly scalable reliable, fast storage infrastructure. • Allows users to add, delete, retrieve and store files on the storage system. • S3 Storage concepts: • Bucket: container for objects stored in S3 every object is stored in some bucket • Object: fundamental entities stored in S3 object consists of meta-data and object data • Keys: A key is a unique identifier for an object within a bucket. A bucket and a key uniquely identify an object.

7. Back2Cloud Architecture

8. Back2Cloud • AutoSync: background daemon to continually sync files and any modifications to it to the cloud • ManualSync: pick a specific file to sync to the cloud • Restore: get your files back • Encryption: secure your data • Recovery: backup process auto-recovers from network and server crashes • Versioning: retrieves different versions of the same file

9. 1) FLEXIBILITY • Backup Anything: Specify folder(s) to monitor • Servers. Laptops & Desktops running… • any OS: Windows, MAC OSX, Linux & FreeBSD

10. 2) PERFORMANCE • Data Encryption to secure files! • Powerful compression that ensures you use up a lot lesser space & bandwidth • Resilience on failures and server crashes

11. 3) USABILITY • A backup is as good as it’s ability to restore any version of the data you need • An intuitive user friendly interface goes a long way towards facilitating better backup habits.. • You own and control your data • You pay for only what you use • Many alternatives just die ( e.g. Xdrive)

12. Back2Cloud- OnlineAccess your files where ‘YOU’ areNOT where your computer is! • Online Access: view and download your files wherever you are • What if your system crashes or is stolen? • What if you forgot your laptop on the day of a presentation? • What if you want to show something on your friend’s computer? • What if you are lazy or just do not want to install a new application?

13. How does it look?

14. How does it look(cont)

15. Operations • Operations on Services • listAllMyBuckets() • Operations on buckets • createBucket(String bucket, Grant[] acl); • deleteBucket(String bucket) ; • listBucket(...); • Operations on Objects • putObject(String bucket, String key, String obj, MetadataEntry[] metadata, Grant[] acl) ; • getObject (String bucket, String key) ; • delete (String bucket, String key);

16. Authentication, Security • Authentication • Verify user is indeed who he or she claims to be • Achieved by demonstrating user have the secret key • How? • Each request include User ID, Time Stamp and Signature of "AmazonS3" + OPERATION Name + Timestamp, signed by the secret key (this is symmetric key – unlike typical signature) • If the key is secret, only real user could create signature • Amazon server verifies the signature • Communication is done using SSL (Secure socket Layer), so user knows it is indeed the Amazon server which is at the other end • This is all taken care by the S3 Client using key passed in new AWSAuthConnection(awsAccessKeyId, awsSecretAccessKey);

17. Comparisonof Cloud-Based Backup Products

18. Performance Benchmarks

19. Performance Benchmarks(cont)

20. Future Work • Support for multiple users • Capacity to share specific buckets or files with collaborators • Automatic backup of currently open files Challenges • Availability of Service • Data Confidentiality and Auditability • Data transfer bottlenecks and Scalability