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មេម αŸ€αž“αž‘αžΈαŸ§αŸ–
αžŸαŸ’αž
អ αž”αžαŸ’αž™αž€αž˜αŸ’αž˜αžšαž”αžŸαŸ‹αž”αŸ’αž”αž–αŸαž“αŸ’αž’αž–αŸαžαŸ’αŸŒαž˜αžΆαž“αŸ’
(Information System Architecture)
1
៑. αžšαž…αž“αžΆαžŸαž˜αŸ’αž–αŸαž“αŸ’αž’αžšαž”αžŸαŸ‹αž”αŸ’αž”αž–αŸαž“αŸ’αž’ (Systems Structure)αŸ–
αžšαž…αž“αžΆαžŸαž˜αŸ’αž–αŸαž“αŸ’αž’αžšαž”αžŸαŸ‹αž”αŸ’αž”αž–αŸαž“αŸ’αž’αž–αŸαžαŸ’αŸŒαž˜αžΆαž“αŸ’αž˜αŸ’αž½αž™αž…αž…αž€αž…αž…αž‰αž‡αžΆαž”αžΈαž…αŸ‚αž€αž€αžΌαž…αž…αž‡αžΆαŸ–
❖ Presentation Layer αž‚αžΊαž‡αžΆ User Interface αž…αžΌαž›αž‡αžΆαž•αŸ’αŸ‚αŸƒαžŸαŸ†αžšαžΆαž”αŸ‹αž‘αŸ†αž“αžΆαž€αŸ‹αž‘αŸ†αž“αŸ’αž„
αž…αŸ„αž™αž•αŸ’αž‘
αŸƒ αž›αŸ‹αž‡αžΆαž˜αŸ’αž½αž™αž“αŸ’αžΉαž„ User αž…αžΌαžΎαž˜αŸ’αž”αžΈαž…αŸ„αž™ User αž”αž‰αŸ’
αž…αž… αž›αž‘αž·αž“αŸ’αž€αž“αŸ’αŸαž™αžŸαŸ†αžšαžΆαž”αŸ‹
αž”αž‰αŸ’
αž‡αž… αž“αŸ’αž…αŸ…αž…αŸ‚αž€αž€αž…αŸ‚αŸαž„αž…αž‘αŸ€αžαŸ’αžšαž”αžŸαŸ‹αž”αŸ’αž”αž–αŸαž“αŸ’αž’αž–αŸαžαŸ’αŸŒαž˜αžΆαž“αŸ’αŸ” αž˜αŸ’αž™αžΆαž„αž…αž‘αŸ€αžαŸ’ User αŸ„αž…
αž…αžŸαŸ‚αž„αžšαž€αž–αŸαžαŸ’αŸŒαž˜αžΆαž“αŸ’αžšαž½αž…αž…αž€αž…αž”αŸ’αž”αž¬αž›αž»αž”αž–αŸαžαŸ’αŸŒαž˜αžΆαž“αŸ’αž…αžΌαž›αžšαž€αž… αžΎαž‰αžαžΆαž˜αŸ’αžšαž™αŸˆαž…αŸ‚αž€αž€
Presentation Layer αž…αž“αŸ’αŸαŸ‡αŸ”
❖ Business Logic (Application Logic) Layer αž‚αžΊαž‡αžΆαž…αŸ‚αž€αž€αžŸαŸ†αžšαžΆαž”αŸ‹αž…αŸ„αŸαŸ‡αžŸαŸ’αžšαžŸαŸ’αžαž™
αž”αž‰αŸ’αž 
អ αž‘αŸ†αž„αž‘αžΆαž™ αž…αžΌαž›β€‹
αž‘αž€αŸ‹αž‘αž„αž‡αžΆαž˜αŸ’αž½αž™αž“αŸ’αžΉαž„αžΌαŸ†αž…αžŽ
ើ αžšαž€αžΆαžšαž–αžΆαžŽ
ិ αž‡αŸ’αž‡αž€αž˜αŸ’αž˜β€‹ αž…αŸ„αž™
Programmers αž‡αžΆαž’αŸ’αž€αž€αžŸαžšαž…αžŸαžšαž€αž…αžΌαž•αŸ’αž“αŸ’αž”αŸ’αž”αžΌαž”αŸ’αž€αžΆαž˜αŸ’αžŽαžΆαž˜αŸ’αž½αž™ αž…αžΌαžΎαž˜αŸ’αž”αžΈαž…αŸ„αŸαŸ‡αžŸαŸ’αžšαžŸαŸ’αžαž™
αž”αž‰αŸ’αž 
អ αž‘αŸ†αž„αž…αž“αžΆαŸαŸ‡ αž…αŸ…αžαžΆαž˜αŸ’αž›αž€αžαžαžŽ
ឌ αž“αŸ’αž·αž„αž…αŸ„αž›αž€αžΆαžšαžŽ
៍ αž…αžΌαž›αž”αžΆαž“αŸ’αž€αŸ†αžŽαžαŸ’αŸ‹αž…αŸ…
αž€αž€αž»αž„αž˜αŸ’αž»αžαž„αžΆαžšαžšαž”αžŸαŸ‹αž”αŸ’αž”αž–αŸαž“αŸ’αž’αž–αžΆαžŽ
ិ αž‡αŸ’αž‡αž€αž˜αŸ’αž˜αž“αŸ’αžΈαž˜αŸ’αž½αž™αŸ—αŸ”
2
❖ Data Layer αž‚αžΊαž‡αžΆαž…αŸ‚αž€αž€αžŸαŸ†αžšαžΆαž”αŸ‹αŸ‚αŸƒαž»αž€αž‘αž·αž“αŸ’αž€αž“αŸ’αŸαž™αž‡αžΆαž“αŸ’αž·αžšαž“αŸ’αžαŸαŸαž€αž€αž»αž„αžαžΆαžšαžΆαž„αŸ”
3
Presentation Layer
Application Logic Layer
Data Layer
្. αžŸαŸ’αž
អ αž”αžαŸ’αž™αž€αž˜αŸ’αž˜αžšαž”αžŸαŸ‹αž”αŸ’αž”αž–αŸαž“αŸ’αž’ (Systems Architecture)αŸ–
αž‡αžΆαž‘αž…αž…αŸ…αž”αŸ’αž”αž–αŸαž“αŸ’αž’αž–αŸαžαŸ’αŸŒαž˜αžΆαž“αŸ’αž…αž…αž€αž…αž…αž‰αž‡αžΆαž”αžΈαž”αŸ’αž”αž…αŸαž‘αžΌαž…αž…αž‡αžΆαŸ–
❖ Desktop Systems αž‚αžΊαž‡αžΆ Systems αž…αžΌαž›αž”αžΆαž“αŸ’αž…αž€αžΎαžαŸ’αž… αžΎαž„αž…αŸ„αž™ DBMS αž’αž˜αŸ’αž˜
αžαžΆαžΌαž…αž…αž‡αžΆ Microsoft Access αž‡αžΆαž…αžΌαžΎαž˜αŸ’αŸ” αžœαžΆαž’αŸ’αž“αŸ’αž»αž‰αŸ’αž 
អ αžαŸ’αž·αž…αŸ„αž™αž’αŸ’αž€αž€αž…αž”αŸ’αž”αžΎαž”αŸ’αž”αžΆαžŸαŸ‹αž˜αžΆ
αž€ αž€αŸ‹
αž¬αž–αžΈαžšαž”αžΈαž“αžΆαž€αŸ‹αŸ„αž…αžΌαŸ†αž…αžŽ
ើ αžšαž€αžΆαžšαž…αŸ…αž…αž›αžΎαž‘αž·αž“αŸ’αž€αž“αŸ’αŸαž™αž€αž€αž»αž„αž…αž–αž›αž…αžαŸ’αž˜αŸ’αž½αž™αŸ”
❖ Client-Server Systems αž‚αžΊαž‡αžΆ Systems αž…αžΌαž›αž”αŸ’αžαŸ’αžΌαžœαž”αžΆαž“αŸ’αž”αž…αž„αž€αžΎαžαŸ’αž… αžΎαž„αž…αŸ„αž™
DBMS Server αžΌαž…αž…αž‡αžΆ SQL Server, Oracle αž“αŸ’αž·αž„ MySQL αž‡αžΆαž…αžΌαžΎαž˜αŸ’αŸ” Client-
Server System αž…αž…αž€αž…αž…αž‰αž‡αžΆαž–αžΈαžšαž”αŸ’αž”αž…αŸαž‘αž…αž‘αŸ€αžαŸ’αž‚αžΊαŸ–
β–ͺ Fat Client-Server Systems αž‚αžΊαž‡αžΆ Systems αž…αžΌαž›αž…αŸ‚αž€αž€ Presentation
Layer αž“αŸ’αž·αž„αž…αŸ‚αž€αž€ Application Logic Layer αž”αŸ’αžαŸ’αžΌαžœαž”αžΆαž“αŸ’αž”αž…αž„αž€αžΎαžαŸ’αž… αžΎαž„αž‡αžΆαž˜αŸ’αž½αž™αŸ„
αž€
αž…αŸ„αž™αž”αŸ’αžαŸ’αžΌαžœαžΌαŸ†αž…αžŽ
ើ αžšαž€αžΆαžšαž…αŸ…αž€αž€αž»αž„ Client Computer αž…αŸ†αž…αžŽαž€αž― Data Layer
αžŸαžΆαž·αžαŸ’αž…αŸ…αž€αž€αž»αž„ Server ComputerαŸ”
4
β–ͺ Thin Client-Server Systems αž‚αžΊαž‡αžΆ Systems αž…αžΌαž›αž…αŸ‚αž€αž€ Application
Logic Layer αž“αŸ’αž·αž„αž…αŸ‚αž€αž€ Data Layer αž”αŸ’αžαŸ’αžΌαžœαž”αžΆαž“αŸ’αž”αž…αž„αž€αžΎαžαŸ’αž… αžΎαž„αž‡αžΆαž˜αŸ’αž½αž™αŸ„
αž€ αž…αŸ…
αž€αž€αž»αž„ Database αžšαž”αžŸαŸ‹ DBMS Server αž…αŸ„αž™αž”αŸ’αžαŸ’αžΌαžœαžΌαŸ†αž…αžŽ
ើ αžšαž€αžΆαžšαž€αž€αž»αž„αž€αžΆαžšαž…αŸ„αŸαŸ‡
αžŸαŸ’αžšαžŸαŸ’αžαž™αž”αž‰αŸ’αž 
អ αž…αŸ…αž― Server ComputerαŸ” αž…αŸ†αž…αžŽαž€αž―αž…αŸ‚αž€αž€ Presentation
Layer αžŸαžΆαž·αžαŸ’αž…αŸ…αž€αž€αž»αž„ Client Computer αž˜αžΆαž“αŸ’αž“αžΆαž‘αžΈαž”αž‰αŸ’
αž‡αž… αž“αŸ’αž‘αž·αž“αŸ’αž€αž“αŸ’αŸαž™αž“αŸ’αž·αž„αž‘αž‘αž½αž›
αž›αž‘αž’αŸ‚αž›αž–αŸαžαŸ’αŸŒαž˜αžΆαž“αŸ’αž”αž™αž»αž…αžŽαžΆ
ណ αŸαŸ‡αŸ”
αž‡αžΆαž‘αž…αž…αŸ… Fat Client-Server Systems αžΌαŸ†αž…αžŽ
ើ αžšαž€αžΆαžšαž™αžΊαžαŸ’αž‡αžΆαž„ Thin
Client-Server Systems αž…αž”αŸ’αž–αžΆαŸαŸ‡αž€αžΆαžšαž…αŸ„αŸαŸ‡αžŸαŸ’αžšαžŸαŸ’αžαž™αž”αž‰αŸ’αž 
អ αž‘αŸ†αž„αž‘αžΆαž™αž”αŸ’αž”αž”αŸ’αž–αžΉαžαŸ’αžαŸαž…αŸ…αž…αŸ…
αž€αž€αž»αž„ Client ComputerαŸ” αžœαžΆαž”αŸ’αžαŸ’αžΌαžœαž‘αž‰αž‘αž·αž“αŸ’αž€αž“αŸ’αŸαž™αž‘αŸ†αž„αž’αŸ’αžŸαŸ‹αž–αžΈ Server Computer
αž˜αŸ’αž€αž€αžΆαž“αŸ’αŸ‹ Client Computer αž…αžΌαžΎαž˜αŸ’αž”αžΈαžΌαŸ†αž…αžŽ
ើ αžšαž€αžΆαžš αž…αžΌαž›αž…αž’αŸ‚αžΎαž…αŸ„αž™ Network slowαŸ”
αž€αŸαž”αž™αž»αž…αž“αŸ’αžαŸ Fat Client-Server Systems αž”αŸ’αžαŸ’αžΌαžœαž”αžΆαž“αŸ’αž”αž…αž„αž€αžΎαžαŸ’αž… αžΎαž„αž…αŸ„αž™αž…αž”αŸ’αž”αžΎαžšαž™αŸˆαž…αž–αž›
αžαž›αžΈαž‡αžΆαž„ Thin Client-Server SystemsαŸ”
5
➒ αž…αŸ†αžŽαžΆαŸ†αŸ– Client-Server Systems αž”αŸ’αžαŸ’αžΌαžœαž”αžΆαž“αŸ’αž”αž…αž„αž€αžΎαžαŸ’αž€αž€αž»αž„αž›αž€αžαžŽαŸˆ Two-
tier ឬ Three-tierαŸ” αž…αŸ†αž…αž–αžΆαŸαŸ‡ Two-tier αž‚αžΊ Systems αžŸαžΆαž·αžαŸ’αž€αž€αž»αž„αž”αŸ’αž”αž…αŸαž‘ Fat
Client-Server Systems ឬ Thin Client-Server SystemsαŸ” αž…αŸ†αž…αžŽαž€αž―
Three-tier αž…αŸ‚αž€αž€αž‘αŸ†αž„αž”αžΈαžŸαžΆαž·αžαŸ’αž…αŸ…αŸ„αž…αŸ‹αž–αžΈαŸ„
αž€ αž…αŸ„αž™αž…αž‚αž”αžΆαž“αŸ’αž”αž…αž„αž€αžΎαžαŸ’ Middle
Layer αž˜αŸ’αž½αž™αž…αž‘αŸ€αžαŸ’αž…αžΌαž›αž”αŸ’αžαŸ’αžΌαžœαž”αžΆαž“αŸ’αž…αŸ…αžαžΆ Application Server αž…αžΌαž›αž˜αžΆαž“αŸ’αž“αžΆαž‘αžΈ
αžΌαŸ†αž…αžŽ
ើ αžšαž€αžΆαžš Application Logic ឬ Business LogicαŸ” αž…αŸ…αž€αž€αž»αž„ Three-tier
Systems αž…αž‚αž”αžΆαž“αŸ’αž…αž”αŸ’αž”αžΎ Software αž˜αŸ’αž½αž™αž‚αžΊ Middleware αž€αž€αž»αž„αž€αžΆαžšαž…αž’αŸ‚αžΎαž‘αŸ†αž“αžΆαž€αŸ‹αž‘αŸ†αž“αŸ’αž„
αžšαžœαžΆαž„αž…αŸ‚αž€αž€αž‘αŸ†αž„αž”αžΈαŸ”
❖ Distributed Systems αž‚αžΊαž‡αžΆ Systems αž…αžΌαž›αž˜αžΆαž“αŸ’αž›αž€αžαžŽαŸˆαžŸαŸ’αžšαžŸαž…αžΌαŸ€αž„αž…αŸ…αž“αŸ’αžΉαž„
Client-Server Systems αž…αžΌαžš αž”αŸ’αŸ„αž“αŸ’αŸ‹αž…αžαŸ’ DBMS Server αž”αŸ’αžαŸ’αžΌαžœαž”αžΆαž“αŸ’αž”αž‰αŸ’
αž…αž… αž›αž…αŸ…
αž€αž€αž»αž„ Server Computer αž•αŸ’αž“αŸ’αž”αŸ’αž‚αž”αŸ‹ Nodes αž‘αŸ†αž„αž’αŸ’αžŸαŸ‹αžšαž”αžŸαŸ‹ Computer
NetworkαŸ”
6

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Chapter7 information system architecture

  • 2. ៑. αžšαž…αž“αžΆαžŸαž˜αŸ’αž–αŸαž“αŸ’αž’αžšαž”αžŸαŸ‹αž”αŸ’αž”αž–αŸαž“αŸ’αž’ (Systems Structure)αŸ– αžšαž…αž“αžΆαžŸαž˜αŸ’αž–αŸαž“αŸ’αž’αžšαž”αžŸαŸ‹αž”αŸ’αž”αž–αŸαž“αŸ’αž’αž–αŸαžαŸ’αŸŒαž˜αžΆαž“αŸ’αž˜αŸ’αž½αž™αž…αž…αž€αž…αž…αž‰αž‡αžΆαž”αžΈαž…αŸ‚αž€αž€αžΌαž…αž…αž‡αžΆαŸ– ❖ Presentation Layer αž‚αžΊαž‡αžΆ User Interface αž…αžΌαž›αž‡αžΆαž•αŸ’αŸ‚αŸƒαžŸαŸ†αžšαžΆαž”αŸ‹αž‘αŸ†αž“αžΆαž€αŸ‹αž‘αŸ†αž“αŸ’αž„ αž…αŸ„αž™αž•αŸ’αž‘ αŸƒ αž›αŸ‹αž‡αžΆαž˜αŸ’αž½αž™αž“αŸ’αžΉαž„ User αž…αžΌαžΎαž˜αŸ’αž”αžΈαž…αŸ„αž™ User αž”αž‰αŸ’ αž…αž… αž›αž‘αž·αž“αŸ’αž€αž“αŸ’αŸαž™αžŸαŸ†αžšαžΆαž”αŸ‹ αž”αž‰αŸ’ αž‡αž… αž“αŸ’αž…αŸ…αž…αŸ‚αž€αž€αž…αŸ‚αŸαž„αž…αž‘αŸ€αžαŸ’αžšαž”αžŸαŸ‹αž”αŸ’αž”αž–αŸαž“αŸ’αž’αž–αŸαžαŸ’αŸŒαž˜αžΆαž“αŸ’αŸ” αž˜αŸ’αž™αžΆαž„αž…αž‘αŸ€αžαŸ’ User αŸ„αž… αž…αžŸαŸ‚αž„αžšαž€αž–αŸαžαŸ’αŸŒαž˜αžΆαž“αŸ’αžšαž½αž…αž…αž€αž…αž”αŸ’αž”αž¬αž›αž»αž”αž–αŸαžαŸ’αŸŒαž˜αžΆαž“αŸ’αž…αžΌαž›αžšαž€αž… αžΎαž‰αžαžΆαž˜αŸ’αžšαž™αŸˆαž…αŸ‚αž€αž€ Presentation Layer αž…αž“αŸ’αŸαŸ‡αŸ” ❖ Business Logic (Application Logic) Layer αž‚αžΊαž‡αžΆαž…αŸ‚αž€αž€αžŸαŸ†αžšαžΆαž”αŸ‹αž…αŸ„αŸαŸ‡αžŸαŸ’αžšαžŸαŸ’αžαž™ αž”αž‰αŸ’αž  អ αž‘αŸ†αž„αž‘αžΆαž™ αž…αžΌαž›β€‹ αž‘αž€αŸ‹αž‘αž„αž‡αžΆαž˜αŸ’αž½αž™αž“αŸ’αžΉαž„αžΌαŸ†αž…αžŽ ើ αžšαž€αžΆαžšαž–αžΆαžŽ ិ αž‡αŸ’αž‡αž€αž˜αŸ’αž˜β€‹ αž…αŸ„αž™ Programmers αž‡αžΆαž’αŸ’αž€αž€αžŸαžšαž…αžŸαžšαž€αž…αžΌαž•αŸ’αž“αŸ’αž”αŸ’αž”αžΌαž”αŸ’αž€αžΆαž˜αŸ’αžŽαžΆαž˜αŸ’αž½αž™ αž…αžΌαžΎαž˜αŸ’αž”αžΈαž…αŸ„αŸαŸ‡αžŸαŸ’αžšαžŸαŸ’αžαž™ αž”αž‰αŸ’αž  អ αž‘αŸ†αž„αž…αž“αžΆαŸαŸ‡ αž…αŸ…αžαžΆαž˜αŸ’αž›αž€αžαžαžŽ ឌ αž“αŸ’αž·αž„αž…αŸ„αž›αž€αžΆαžšαžŽ ៍ αž…αžΌαž›αž”αžΆαž“αŸ’αž€αŸ†αžŽαžαŸ’αŸ‹αž…αŸ… αž€αž€αž»αž„αž˜αŸ’αž»αžαž„αžΆαžšαžšαž”αžŸαŸ‹αž”αŸ’αž”αž–αŸαž“αŸ’αž’αž–αžΆαžŽ ិ αž‡αŸ’αž‡αž€αž˜αŸ’αž˜αž“αŸ’αžΈαž˜αŸ’αž½αž™αŸ—αŸ” 2
  • 3. ❖ Data Layer αž‚αžΊαž‡αžΆαž…αŸ‚αž€αž€αžŸαŸ†αžšαžΆαž”αŸ‹αŸ‚αŸƒαž»αž€αž‘αž·αž“αŸ’αž€αž“αŸ’αŸαž™αž‡αžΆαž“αŸ’αž·αžšαž“αŸ’αžαŸαŸαž€αž€αž»αž„αžαžΆαžšαžΆαž„αŸ” 3 Presentation Layer Application Logic Layer Data Layer
  • 4. ្. αžŸαŸ’αž អ αž”αžαŸ’αž™αž€αž˜αŸ’αž˜αžšαž”αžŸαŸ‹αž”αŸ’αž”αž–αŸαž“αŸ’αž’ (Systems Architecture)αŸ– αž‡αžΆαž‘αž…αž…αŸ…αž”αŸ’αž”αž–αŸαž“αŸ’αž’αž–αŸαžαŸ’αŸŒαž˜αžΆαž“αŸ’αž…αž…αž€αž…αž…αž‰αž‡αžΆαž”αžΈαž”αŸ’αž”αž…αŸαž‘αžΌαž…αž…αž‡αžΆαŸ– ❖ Desktop Systems αž‚αžΊαž‡αžΆ Systems αž…αžΌαž›αž”αžΆαž“αŸ’αž…αž€αžΎαžαŸ’αž… αžΎαž„αž…αŸ„αž™ DBMS αž’αž˜αŸ’αž˜ αžαžΆαžΌαž…αž…αž‡αžΆ Microsoft Access αž‡αžΆαž…αžΌαžΎαž˜αŸ’αŸ” αžœαžΆαž’αŸ’αž“αŸ’αž»αž‰αŸ’αž  អ αžαŸ’αž·αž…αŸ„αž™αž’αŸ’αž€αž€αž…αž”αŸ’αž”αžΎαž”αŸ’αž”αžΆαžŸαŸ‹αž˜αžΆ αž€ αž€αŸ‹ αž¬αž–αžΈαžšαž”αžΈαž“αžΆαž€αŸ‹αŸ„αž…αžΌαŸ†αž…αžŽ ើ αžšαž€αžΆαžšαž…αŸ…αž…αž›αžΎαž‘αž·αž“αŸ’αž€αž“αŸ’αŸαž™αž€αž€αž»αž„αž…αž–αž›αž…αžαŸ’αž˜αŸ’αž½αž™αŸ” ❖ Client-Server Systems αž‚αžΊαž‡αžΆ Systems αž…αžΌαž›αž”αŸ’αžαŸ’αžΌαžœαž”αžΆαž“αŸ’αž”αž…αž„αž€αžΎαžαŸ’αž… αžΎαž„αž…αŸ„αž™ DBMS Server αžΌαž…αž…αž‡αžΆ SQL Server, Oracle αž“αŸ’αž·αž„ MySQL αž‡αžΆαž…αžΌαžΎαž˜αŸ’αŸ” Client- Server System αž…αž…αž€αž…αž…αž‰αž‡αžΆαž–αžΈαžšαž”αŸ’αž”αž…αŸαž‘αž…αž‘αŸ€αžαŸ’αž‚αžΊαŸ– β–ͺ Fat Client-Server Systems αž‚αžΊαž‡αžΆ Systems αž…αžΌαž›αž…αŸ‚αž€αž€ Presentation Layer αž“αŸ’αž·αž„αž…αŸ‚αž€αž€ Application Logic Layer αž”αŸ’αžαŸ’αžΌαžœαž”αžΆαž“αŸ’αž”αž…αž„αž€αžΎαžαŸ’αž… αžΎαž„αž‡αžΆαž˜αŸ’αž½αž™αŸ„ αž€ αž…αŸ„αž™αž”αŸ’αžαŸ’αžΌαžœαžΌαŸ†αž…αžŽ ើ αžšαž€αžΆαžšαž…αŸ…αž€αž€αž»αž„ Client Computer αž…αŸ†αž…αžŽαž€αž― Data Layer αžŸαžΆαž·αžαŸ’αž…αŸ…αž€αž€αž»αž„ Server ComputerαŸ” 4
  • 5. β–ͺ Thin Client-Server Systems αž‚αžΊαž‡αžΆ Systems αž…αžΌαž›αž…αŸ‚αž€αž€ Application Logic Layer αž“αŸ’αž·αž„αž…αŸ‚αž€αž€ Data Layer αž”αŸ’αžαŸ’αžΌαžœαž”αžΆαž“αŸ’αž”αž…αž„αž€αžΎαžαŸ’αž… αžΎαž„αž‡αžΆαž˜αŸ’αž½αž™αŸ„ αž€ αž…αŸ… αž€αž€αž»αž„ Database αžšαž”αžŸαŸ‹ DBMS Server αž…αŸ„αž™αž”αŸ’αžαŸ’αžΌαžœαžΌαŸ†αž…αžŽ ើ αžšαž€αžΆαžšαž€αž€αž»αž„αž€αžΆαžšαž…αŸ„αŸαŸ‡ αžŸαŸ’αžšαžŸαŸ’αžαž™αž”αž‰αŸ’αž  អ αž…αŸ…αž― Server ComputerαŸ” αž…αŸ†αž…αžŽαž€αž―αž…αŸ‚αž€αž€ Presentation Layer αžŸαžΆαž·αžαŸ’αž…αŸ…αž€αž€αž»αž„ Client Computer αž˜αžΆαž“αŸ’αž“αžΆαž‘αžΈαž”αž‰αŸ’ αž‡αž… αž“αŸ’αž‘αž·αž“αŸ’αž€αž“αŸ’αŸαž™αž“αŸ’αž·αž„αž‘αž‘αž½αž› αž›αž‘αž’αŸ‚αž›αž–αŸαžαŸ’αŸŒαž˜αžΆαž“αŸ’αž”αž™αž»αž…αžŽαžΆ ណ αŸαŸ‡αŸ” αž‡αžΆαž‘αž…αž…αŸ… Fat Client-Server Systems αžΌαŸ†αž…αžŽ ើ αžšαž€αžΆαžšαž™αžΊαžαŸ’αž‡αžΆαž„ Thin Client-Server Systems αž…αž”αŸ’αž–αžΆαŸαŸ‡αž€αžΆαžšαž…αŸ„αŸαŸ‡αžŸαŸ’αžšαžŸαŸ’αžαž™αž”αž‰αŸ’αž  អ αž‘αŸ†αž„αž‘αžΆαž™αž”αŸ’αž”αž”αŸ’αž–αžΉαžαŸ’αžαŸαž…αŸ…αž…αŸ… αž€αž€αž»αž„ Client ComputerαŸ” αžœαžΆαž”αŸ’αžαŸ’αžΌαžœαž‘αž‰αž‘αž·αž“αŸ’αž€αž“αŸ’αŸαž™αž‘αŸ†αž„αž’αŸ’αžŸαŸ‹αž–αžΈ Server Computer αž˜αŸ’αž€αž€αžΆαž“αŸ’αŸ‹ Client Computer αž…αžΌαžΎαž˜αŸ’αž”αžΈαžΌαŸ†αž…αžŽ ើ αžšαž€αžΆαžš αž…αžΌαž›αž…αž’αŸ‚αžΎαž…αŸ„αž™ Network slowαŸ” αž€αŸαž”αž™αž»αž…αž“αŸ’αžαŸ Fat Client-Server Systems αž”αŸ’αžαŸ’αžΌαžœαž”αžΆαž“αŸ’αž”αž…αž„αž€αžΎαžαŸ’αž… αžΎαž„αž…αŸ„αž™αž…αž”αŸ’αž”αžΎαžšαž™αŸˆαž…αž–αž› αžαž›αžΈαž‡αžΆαž„ Thin Client-Server SystemsαŸ” 5
  • 6. ➒ αž…αŸ†αžŽαžΆαŸ†αŸ– Client-Server Systems αž”αŸ’αžαŸ’αžΌαžœαž”αžΆαž“αŸ’αž”αž…αž„αž€αžΎαžαŸ’αž€αž€αž»αž„αž›αž€αžαžŽαŸˆ Two- tier ឬ Three-tierαŸ” αž…αŸ†αž…αž–αžΆαŸαŸ‡ Two-tier αž‚αžΊ Systems αžŸαžΆαž·αžαŸ’αž€αž€αž»αž„αž”αŸ’αž”αž…αŸαž‘ Fat Client-Server Systems ឬ Thin Client-Server SystemsαŸ” αž…αŸ†αž…αžŽαž€αž― Three-tier αž…αŸ‚αž€αž€αž‘αŸ†αž„αž”αžΈαžŸαžΆαž·αžαŸ’αž…αŸ…αŸ„αž…αŸ‹αž–αžΈαŸ„ αž€ αž…αŸ„αž™αž…αž‚αž”αžΆαž“αŸ’αž”αž…αž„αž€αžΎαžαŸ’ Middle Layer αž˜αŸ’αž½αž™αž…αž‘αŸ€αžαŸ’αž…αžΌαž›αž”αŸ’αžαŸ’αžΌαžœαž”αžΆαž“αŸ’αž…αŸ…αžαžΆ Application Server αž…αžΌαž›αž˜αžΆαž“αŸ’αž“αžΆαž‘αžΈ αžΌαŸ†αž…αžŽ ើ αžšαž€αžΆαžš Application Logic ឬ Business LogicαŸ” αž…αŸ…αž€αž€αž»αž„ Three-tier Systems αž…αž‚αž”αžΆαž“αŸ’αž…αž”αŸ’αž”αžΎ Software αž˜αŸ’αž½αž™αž‚αžΊ Middleware αž€αž€αž»αž„αž€αžΆαžšαž…αž’αŸ‚αžΎαž‘αŸ†αž“αžΆαž€αŸ‹αž‘αŸ†αž“αŸ’αž„ αžšαžœαžΆαž„αž…αŸ‚αž€αž€αž‘αŸ†αž„αž”αžΈαŸ” ❖ Distributed Systems αž‚αžΊαž‡αžΆ Systems αž…αžΌαž›αž˜αžΆαž“αŸ’αž›αž€αžαžŽαŸˆαžŸαŸ’αžšαžŸαž…αžΌαŸ€αž„αž…αŸ…αž“αŸ’αžΉαž„ Client-Server Systems αž…αžΌαžš αž”αŸ’αŸ„αž“αŸ’αŸ‹αž…αžαŸ’ DBMS Server αž”αŸ’αžαŸ’αžΌαžœαž”αžΆαž“αŸ’αž”αž‰αŸ’ αž…αž… αž›αž…αŸ… αž€αž€αž»αž„ Server Computer αž•αŸ’αž“αŸ’αž”αŸ’αž‚αž”αŸ‹ Nodes αž‘αŸ†αž„αž’αŸ’αžŸαŸ‹αžšαž”αžŸαŸ‹ Computer NetworkαŸ” 6