Back 2 Cloud Architecture
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.
Cloud Computing
Service Templates
IT Cloud
Access Services
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
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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.
Amazon
Lower-level,
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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:
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.
Back2Cloud Architecture
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
Versioning: retrieves different versions of the same file
1) FLEXIBILITY
Servers. Laptops & Desktops running…
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Data Encryption to secure files!
Powerful compression that ensures you use up a lot lesser space & bandwidth
Resilience on failures and server crashes
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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)
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Back2Cloud- Online Access your files where ‘YOU’ are NOT 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?
How does it look?
How does it look(cont)
getObject (String bucket, String key) ;
delete (String bucket, String key);
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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);
Product name
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Backblaze
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Time taken to Download
Time to download in Back2Cloud( sec) 10 20 30 40 50 60 70 80 90 100 13 16 25 18 50 58 64 72 80 99 Time to download in Mozy( sec) 10 20 30 40 50 60 70 80 90 100 41 90 130 90 160 114 220 150 200 267
File Size(MB)
Time (secs)
Performance Benchmarks(cont)
Time taken to Upload
Time to upload in Back2Cloud ( sec) 10 20 30 40 50 60 70 80 90 100 10 19 27 34 64 69 99 103 105 110 Time to upload in Mozy(sec) 10 20 30 40 50 60 70 80 90 100 120 240 270 540 272 900 705 907 950 995
File Size(MB)
Time (secs)
Future Work
Automatic backup of currently open files
Challenges