http://www.teseshaokao.com/ 2012-02-22T22:17:30-05:00 http://www.teseshaokao.com/ http://www.teseshaokao.com/lib/tpl/arctic-mbo/images/favicon.ico text/html 2012-01-22T14:29:45-05:00 sureshvasudev http://www.teseshaokao.com/doku.php/wiki:various_cloud_deployment_models?rev=1327260585&do=diff Following are the various deployment models associated with Cloud computing. Public Cloud * It is the purest form of cloud computing, though it cannot be practically used for all application deployment. * Services are provided off-premises. That is the infrastructure is provided by a third party. * Customers using the infrastructure will be sharing the underlying resources with other customers in the cloud. text/html 2012-01-22T14:26:09-05:00 sureshvasudev http://www.teseshaokao.com/doku.php/wiki:cloud_computing?rev=1327260369&do=diff Cloud Computing Introduction to Cloud Computing Essential characteristics of a Cloud Recognizing a Cloud Service Flavors of a Cloud Service Various Cloud Deployment Models text/html 2012-01-18T13:40:47-05:00 sureshvasudev http://www.teseshaokao.com/doku.php/wiki:flavors_of_a_cloud_service?rev=1326912047&do=diff It is not necessary that all Cloud services are similar in nature. It can be of different flavors though it has common characteristics. The variants can be generally classified into three as follows Software as a Service – SaaS In SaaS Model, complete software is available over the web as a service. Customers can make use of this software and pay a fee for the usage. They don’t need to worry about the hardware, software, scalability or security. text/html 2012-01-16T13:03:59-05:00 sureshvasudev http://www.teseshaokao.com/doku.php/wiki:recognizing_a_cloud_service?rev=1326737039&do=diff People sometimes doubt or believe that cloud service is a synonym for web hosting service. From a high level, web hosting service includes allocation of resources and software to host an internet application. Those resources are shared by other customers. The cloud also has got these features which confuses people to believe that web hosting and cloud service are one and the same. text/html 2012-01-15T13:53:42-05:00 sureshvasudev http://www.teseshaokao.com/doku.php/wiki:essential_characteristics_of_a_cloud?rev=1326653622&do=diff * Cloud is a pool of computing resources * Cloud user must be able to access these resources and can do varying degrees of configuration * Cloud user must be able to deploy their application in the cloud * Cloud users can provision more resources for their hosted application with minimum or zero manual intervention. text/html 2012-01-15T13:47:34-05:00 sureshvasudev http://www.teseshaokao.com/doku.php/?image=cloudarchitecture.png&ns=&rev=1326653254&tab_details=history&mediado=diff&do=media <img src="/lib/exe/fetch.php/cloudarchitecture.png?w=296&h=169t=1326653254" alt="cloudarchitecture.png" /> text/html 2012-01-15T13:41:33-05:00 sureshvasudev http://www.teseshaokao.com/doku.php/?image=wiki%3Acloudarchitecture.png&ns=wiki&rev=1326652893&tab_details=history&mediado=diff&do=media <img src="/lib/exe/fetch.php/wiki:cloudarchitecture.png?w=296&h=169t=1326652893" alt="wiki:cloudarchitecture.png" /> text/html 2012-01-11T12:38:44-05:00 sureshvasudev http://www.teseshaokao.com/doku.php/wiki:unix:useful_unix_commands?rev=1326303524&do=diff Command to find the directory size : du -sh Command to find the number of files in a directory: ls -1 | wc (The result will 1 > actual files. so result 10 means there are 9 files) text/html 2012-01-11T12:37:27-05:00 sureshvasudev http://www.teseshaokao.com/doku.php/wiki:how_to?rev=1326303447&do=diff UNIX Shell Script Adding missing extensions to files Deleting all sub directories which are empty Useful Unix Commands text/html 2012-01-11T12:36:54-05:00 sureshvasudev http://www.teseshaokao.com/doku.php/wiki:unix:extracting_the_file_size_and_file_count?rev=1326303414&do=diff Command to find the directory size : du -sh Command to find the number of files in a directory: ls-1 | wc (The result will 1 > actual files. so result 10 means there are 9 files) text/html 2012-01-09T13:51:37-05:00 sureshvasudev http://www.teseshaokao.com/doku.php/wiki:java7_auto_closing_of_resources?rev=1326135097&do=diff In Java it is the responsibility of the developer to make sure that resources are closed after use. Resources like database connection, IOStreams are costly and they can impact the performance of the application. However closing these resources are not straightforward due to following reasons text/html 2012-01-09T13:38:25-05:00 sureshvasudev http://www.teseshaokao.com/doku.php/wiki:what_is_new_in_java7?rev=1326134305&do=diff * Organizing Large Numbers in Java * Using String in switch-case * Java7 Exception Handling Features * Java7 Generics Declaration * Java7 Auto Closing of Resources text/html 2012-01-08T15:10:15-05:00 sureshvasudev http://www.teseshaokao.com/doku.php/wiki:introduction_to_cloud_computing?rev=1326053415&do=diff In cloud computing we use computing resources like other common utilities like electricity in our home. We can use any amount of electricity at home and the bill will be based on the number of units we used. Cloud computing provides such a facility to the software community where they can take the computing resources for lease. text/html 2012-01-07T11:30:01-05:00 sureshvasudev http://www.teseshaokao.com/doku.php/wiki:java7_generics_declaration?rev=1325953801&do=diff The “Generics” was a handy feature introduced since Java 5 (code named Tiger) which provided compile time check on the data stored in collections, defining templates etc. However the syntax was not user friendly. We need to declare the types both at the left and right hand side of the declaration.