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Showing posts from 2012

Cloud Providers & Tools

Providers AWS Azure Heroku RackSpace CloudBerry Explorer for Amazon S3 S3 Firefox Plugin Linpack benchmarks for EC2 Heroku could be used rather than AWS ? Yes its a trade off on features and cost Is amazon payment linked to australian banks 

Cloud Terms

BYOL - bring your own licence model REST via access keys S3 is storage optimized for - WORM - Write Once Read Many (Data replicated) CloudFront - CDN - Content Delivery Network Compute Unified Device Architecture  ( CUDA ) is a parallel computing architecture developed by  Nvidia  for graphics processing EC2 - 

AWS Training

AWS provides an enterprise agility in utilizing technology rapidly without incurring upfront capital expenditure. Architecture for Failure  It uses utility billing to charge for use cases. S3 - Simple Storage Service S3 provides a way to store WORM - write once read many. Synchronized on different data centres it uses key value pair concept Updates are atomic, no partial updates, so its better to split files and upload. Eventual consistency vs immediate consistency - When a write takes place everyone can read it immediately (outside US region)  Standard S3 vs Reduced Redundancy Storage (RRS) - Approx 30% cheaper than standard RRS could be used for things that could be reproduced compared to S3 eg: RSS feeds S3 can contains buckets which can contain objects  S3 CloudBerry - Browsing S3 Protocol/S3/Bucket/Key - http://s3.amazonaws.com/b1/a.jpg Access Control - Secure by default - ACL, Bucket Policies, IAM Policies ACL on bucket don't apply ...

Understanding SCORM

From Wikipedia: Sharable Content Object Reference Model ( SCORM ) is a collection of standards and specifications for web-based e-learning. It defines communications between client side content and a host system called the run-time environment , which is commonly supported by a learning management system. SCORM also defines how content may be packaged into a transferable ZIP file called "Package Interchange Format" (PIF) SCORM is a specification of the Advanced Distributed Learning ( ADL ) Initiative, which comes out of the Office of the United States Secretary of Defense. SCORM 2004 introduced a complex idea called sequencing , which is a set of rules that specifies the order in which a learner may experience content objects . In simple terms, they constrain a learner to a fixed set of paths through the training material , permit the learner to " bookmark " their progress when taking breaks, and assure the acceptability of test scores achieved by the lear...