I try to analyze the data. Are we able to work at KL but live outside KL? Well given that house price in KL is too expensive to buy, more than affordable for rental. But the prices is way lower should you go far out of KL. For example like the place I am living [...]
Archive for May, 2010
Utorrent 2.0.1 Slow in Download
Before this I am using UTorrent 1.8.5 and download speed is great. Max out my 2Mbps DSL connection (around 200kbps++). So when new upgrade available, I happily upgrade to new version. Little did I know what it come with… The download speed is very slow. Rarely reach even 100kbps. Most of the time around 50kbps [...]
Done Final Exam
Finally done. Not so bad, but not that good either. Just look at my previous post, last minute trying to remember all those stuff. Haha. At least I did remember lah. Next task is project presentation. Next week got 2 job interview. Wuhuu! Bookmark on Delicious Digg this post Recommend on Facebook share via Reddit [...]
Type of Middleware
RPC Remote Procedure Call Asynchronous and Synchronous Client make call to procedure running in remote system Message Oriented Middleware Message sent to client is collected and stored until they’re acted upon SQL-Oriented Data Access Between application and database Embedded Middleware Communication service between embedded application and real time operating system Bookmark on Delicious Digg this [...]
Middleware
What is middleware? Software layer that lies between the operating system and the application on each site of the system Middleware Functions: Hiding distribution Make of many part running in distributed location Hiding the heterogeneity of various hardware components, operating system and communication protocol Provide uniform, standard, high level interface to the application developer and [...]
Corba Stubs and Skeleton
Defining Corba Stubs and Skeleton is defining ORB stubs and skeleton Basically Stubs is at client, Skeleton is at server. Stubs has no problem meshing perfectly with the skeleton at server. Even if different programming language Even if different ORB by different vendor Why is that ? Because IDL define the interface so strictly that [...]
Cryptography System
Cryptography is a practice of creating and using encryption system Cryptographic system is a method of hiding data so that only certain people can view Plain text is the original data Ciphertext is the protected data or the encrypted text Encryption is the process or procedure to convert plain text to ciphertext Decryption is the [...]
What is ORB interface?
ORB interface is the one that provides access to every ORB service, except: Client invocation (through Stubs or DII) Object activation and call (through object adapter, typically POA) The services include: Access to Initial Service (Naming Service, Trader Service, Root POA and others) Access to the IFR and construction of DII invocations Object reference operations: [...]
What is ORB?
ORB is Object Request Broker. It is a middleware that uses CORBA specification. It take care of all the details involve in routing a request from client to object, and routing response to its destination. ORB is the custodian of the Interface Repository (IFR), an OMG standardized distributed database containing IDL interface definition. On the [...]
Centralized versus Distributed System
Note: Tomorrow Exam. Centralized Have non autonomous component Often built using homogeneous technology Multiple users share the resources of a centralized system at all time Have single point of control and failure Distributed Have autonomous components May be built using heterogeneous technology Distributed system components may be used exclusively Executed in concurrent process Multiple point [...]
