Amrita Sekhon | IJCSET(www.ijcset.net) | June 2016 | Vol 6, Issue 6, 218-222 PAAS Framework Implementation of Cloud Computing With Google Application Engine - A Review Amrita Sekhon Assistant Professor and Head Department of Computer Science ASBASJS Memorial College, Bela (Ropar) Punjab INDIA-140001 Contact No 9463680940 Abstract- Cloud Computing is a paradigm shift that implies infrastructure is owned by some cloud service sales computing using the Internet by sharing computer resources organization which further sells its services in the industry in place of using storage or software of a local PC. It is the or public arena. Hybrid cloud involves more than one type latest fab of the computer world. Amazon, Google, IBM and of independent clouds which are combined using some Microsoft are the big players in the game of cloud computing. special techniques and standards such that the applications Amazon has currently built the world’s largest marketplace and is a major mover in this revolution of cloud computing. It and data are transparent. is hosting a large number of other businesses on its cloud service infrastructure. Microsoft too entered the cloud computing scenario thus simplifying migration for all types of Windows. Cloud computing provides virtualized and dynamically scalable resources as a service across the Internet. According to the official definition given by NIST(National Institute of Standards and Technology) in 2011, "cloud computing is a model for enabling ubiquitous, convenient, on-demand network access to a shared pool of configurable computing resources (e.g., networks, servers, storage, applications and services) that can be rapidly provisioned and released with minimal management effort or service provider interaction." The NIST defines three service models of cloud computing namely Software as a Service (Saas), Infrastructure as a Service (Iaas) and Platform as a Service (Paas). This paper tries to evaluate the pros and cons of implementing cloud computing as Paas framework with GAE (Google Application Engine). TYPES OF CLOUDS Keywords: Cloud Computing, Google Application Engine The three favors of cloud computing are SAAS (Software (GAE), Software as a Service (Saas), Infrastructure as a as a Service), PAAS (Platform as a Service) and IAAS Service (Iaas), Platform as a Service (Paas), Google (Infrastructure as a Sevice). Computing Engine (GCE), Content Delivery Network (CDN) Saas (cloud application service) is growing rapidly and is the largest cloud market. It uses Internet to deliver applications to clients who handle the interface while the INTRODUCTION applications themselves are managed by third party The concept of cloud computing indeed fulfills the need of vendors. Generally Saas applications donot need any the hour of IT (Information Technology) which is to add downloads while some need a few plugins and are run capabilities and increase capacity of a network on the fly directly through web browsers. Healthcare related without investing in any additional infrastructure or applications, customer relationship management and emails providing training to personnel or purchasing additional are provided as Saas. It provides users the software which software. Cloud computing covers all pay-per-use services is hosted by third party service providers. The application or subscription based services over the Internet in real time along with its data is stored on the third party’s server. This to extend its capabilities. Amazon’s EC2 (Elastic Compute is very convenient for most of the users while is Cloud) and AWS (Amazon Web Services), Microsoft unacceptable to those who seek more controlling power Azure and Apache Hadoop are few popular cloud services over the application and data. Examples of Saas include available. The Amazon uses an automated web based Microsoft 365 and Google Apps. management system to provide an infrastructure as a Paas (cloud platform service) is a computing platform that service (Iaas) eg. storage service ( disk or database) or enables users to build fast and easy web applications virtual server or network end points of preferred capacity. without the need for buying or maintaining software and its Considering the point of deployment, cloud computing entire infrastructure. Paas enables development, platform incorporates three types of clouds namely Private, deployment and testing of applications cost-effectively too. Public and Hybrid cloud. Private cloud implies that its Third party vendors manage storage, servers, networking infrastructure is owned or leased and managed by a single and virtualization in addition to Paas software, while organization. Public cloud (eg. Internet) implies that its 218 Amrita Sekhon | IJCSET(www.ijcset.net) | June 2016 | Vol 6, Issue 6, 218-222 developers simply manage their applications. This middle The App Engine is a trustworthy way to host websites as level layer provides a framework for developing the websites are served via Google’s own data-centers. applications to users without the need to bother about the The Google App Engine is free for some limited number of low level system management. The infrastructure resources, while it charges a fee for each additional storage, management is automatically done for the users while they bandwidth or CPU cycles as required by the application focus on their applications. Heroku, Google App Engine, thereafter. Developers can freely use the preview release of Windows Azure, AWS Elastic Beanstalk, Force.com, GAE (Beta version) with few restrictions viz. they can Apache Stratos are examples of Paas. serve applications with five million page views per month Iaas (cloud infrastructure service) delivers cloud computing limit and 500 MB storage size consumable for free. Users infrastructure such as storage, server, OS and networking pay for only the resources that they use. The resources used facility as a service on-demand. These services are fully by the application are measured in terms of Gigabytes. outsourced on demand to users who pay for services based Thus the App Engine is free for low usage. on consumption. Iaas users manage data, applications, OS, GAE currently supports Java, Go, Python and PHP as middleware and runtime while third party providers programming languages to create a Google cloud. manage storage, servers, networking and virtualization. Applications can be built in Java using Maven, Go using Users are provided with the low level resource management Template/HTML package, Python using Ninja2 and controls (like distributed storage, VM provisioning, etc) WebApp2 and in PHP using Cloud SQL. Owing to its Java and users are free to development their own application runtime environment, apps can be built with standard Java stack ( database, HTTP server, OS, MVC framework, etc). technologies like Java Servlets, JVM or languages such as although this provdes great flexibility to users, but it also JRuby, Clojure, Groovy, Scala and Rhino, which use JVM implies that users have to manage fault tolerance and based compiler or interpreter. Users can host a company’s scaling features themselves. Microsoft Azure, AWS website, host a live chat application using ChannelAPI (Amazon Web Services), GCE (Google Computing (Comet for App Engine) , host a blog using Bloog or some Engine), Cisco Metapod, Rackspace and Joyent are other Python coded Blog software and do many other examples of Iaas. things using the App Engine. GOOGLE APPLICATION ENGINE VS GOOGLE COMPUTING ENGINE Google Cloud Platform offers cloud computing services to built websites and applications, store and analyse data on Google’s infrastructure. Google Application Engine and Google Compute Engine are parts of the Google Cloud Platform. Google Application Engine is a Paas. User simply needs to deploy his website and everything else is done by the platform eg. if that application (website) becomes successful ie traffic goes high, GAE automatically acquires more instances to handle the increased volume. User Cloud Computing Stack focuses on the application domain using the platform provided and the platform itself is completely managed by GOOGLE APPLICATION ENGINE the cloud service. After the free quota available, users are Google Application Engine is a Paas cloud computing charged for storage used, data transferred and instance- development environment for creating, managing and hours, etc. User need not manage the Operating system of hosting web applications provided by Google. It is not just the underlying software. GAE is ideal for inexperienced a framework but the complete platform as a service. Google users. Two significant drawbacks of GAE over GCE are App Engine virtualizes applications across multiple servers. firstly it is comparatively expensive and secondly users It provides automatic scaling for web applications, ie when have less control over certain things or have only one the number of requests for an application increases; GAE specific way to perform a certain thing. proportionately allocates more resources to the web Google Compute Engine is an Iaas. GCE provides a application to handle the auxiliary demand. GAE provides complete infrastructure in the form of a Virtual machine. a large number of functionalities like dynamic web serving User has to create and manage his own virtual application with total support for the common web technologies, himself. User has complete control over the VM persistent storage along with queries, sorting and environment (eg. operating system, web server, database, transaction facility,