- 2070 Asar · 4 marks
Homogeneous vs heterogeneous applications
Short answer
Homogeneous distributed applications run on nodes with identical hardware, OS, language and data formats (e.g., a cluster of identical Linux PCs). Heterogeneous applications span different platforms, languages and data encodings, requiring middleware like CORBA to bridge differences (e.g., a bank integrating a C++ Unix ATM server with a Java Windows service).
Differentiate between homogeneous and heterogeneous distributed applications with example.
A homogeneous distributed application runs on nodes with identical hardware, operating system, language and data formats, so components can interact directly. A heterogeneous distributed application has components running on different platforms, written in different languages, which must communicate through standard interfaces and middleware.
| Point | Homogeneous application | Heterogeneous application |
|---|---|---|
| Platform | Same OS and hardware | Different OS and hardware |
| Language | Single language | Multiple languages (C++, Java, Python) |
| Data representation | Same | Differs; needs marshalling to a common format |
| Communication | Native RPC/sockets are enough | Needs middleware (CORBA, SOAP, REST) |
| Development effort | Low | Higher, interface definitions needed |
| Flexibility and reuse | Limited to one environment | High; legacy systems can be integrated |
| Maintenance | Easy | Harder |
| Example | Parallel computing on a cluster of identical PCs; Java RMI between JVMs | A bank where a C++ ATM server on Unix calls a Java service on Windows through CORBA; a web store using payment services in other languages |
Heterogeneity is handled by interface languages (IDL, WSDL), common transfer syntax (CDR, XML, JSON) and an ORB or web service layer.
✓ Answer checked by Claude Opus 5.5 (high effort)
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