Comparing Servicebased nealford.com
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1 Comparing Servicebased nealford.com
2 agenda Micro Service-oriented Service-based
3 Service-oriented Architecture
4 origins: hubs System B System A System C
5 origins: hubs System B System A System C System D (ftp only)
6 origins: hubs System E (http only) System B System A System C System D (ftp only)
7 origins: hubs System E (http only) System B System A System C System D (ftp only)
8 origins: hubs this is starting to look like a complex, highly dependent spaghetti topology...
9 origins: hubs System E (http only) System B System A Integration Hub System C System D (ftp only)
10 origins: hubs System E (http only) System B System A Integration Hub System C System D (ftp only)
11 origins: hubs System E (http only) System B System A Integration Hub System C System D (ftp only)
12 origins: hubs looks great, but what about single point of failure and performance bottleneck considerations?
13 orchestration hub intelligent hub service oriented / enterprise service bus pattern
14 service-oriented abstraction service taxonomy shared resources middleware interoperability
15 service-oriented business services BS BS BS BS BS BS message bus process choreographer service orchestrator enterprise services ES ES ES ES ES ES application services AS infrastructure services IS
16 service-oriented business services BS BS BS BS BS BS message bus abstract enterprise-level coarse-grained services owned and defined process by business choreographer users service orchestrator no implementation - only name, input, and output data represented as wsdl, bpel, xml, etc. Are we in the business of? enterprise services ES ES ES ES ES ES ExecuteTrade application services AS PlaceOrder infrastructure ProcessClaim services IS
17 service-oriented business services BS BS BS BS BS BS concrete enterprise-level coarse-grained services owned by shared services teams message bus custom or vendor process implementations choreographerthat are one-to-one or one-to-many relationship with business services service orchestrator enterprise services ES ES ES ES ES ES application services AS infrastructure services IS CreateCustomer CalcQuote ValidateTrade
18 service-oriented concrete application-level fine-grained services owned by application teams business services BS BS BS BS BS BS message bus bound to a specific application context process choreographer service orchestrator AddDriver UpdateAddress CalcSalesTax enterprise services ES ES ES ES ES ES application services AS infrastructure services IS
19 service-oriented business services BS BS BS BS BS BS concrete enterprise-level fine-grained services owned by infrastructure or shared services teams message bus implements non-business functionality to support both process choreographer enterprise and business services service orchestrator WriteAudit CheckUserAccess LogError enterprise services ES ES ES ES ES ES application services AS infrastructure services IS
20 service-oriented business services BS BS BS BS BS BS message bus process choreographer service orchestrator mediation and routing message enhancement enterprise services ES ES ES ES ES ES process choreography message transformation application services AS infrastructure services IS service orchestration protocol transformation
21 service-oriented mediation and routing business services BS BS BS BS BS BS message bus enterprise services ES ES ES ES ES ES
22 service-oriented process choreography request request business services BS BS BS BS BS BS message bus process choreographer
23 service-oriented service orchestration request request message bus service orchestrator enterprise services ES ES ES ES ES ES
24 service-oriented service registry business service CreateQuote service servic registry calcquote() savequote() enterprise service enterprise service location, name, and implementation transparency service registry CreateQuote calcquote savequote rmi://atlas:1299/savequote
25 service-oriented message enhancement cusip, mm/dd/yy client application enhance servic message sedol, yyyy.mm.dd, symbol enterprise service /23/ /23/ AAPL AAPL contract decoupling
26 service-oriented message transformation xml java object client application transform servic message enterprise service xml xml java object java object contract decoupling
27 service-oriented protocol transformation client application SOAP/WS transform servic protocol RMI/IIOP enterprise service ATMI enterprise service access decoupling implementation transparency
28 service-oriented business services BS BS BS BS BS BS message bus process choreographer service orchestrator enterprise services ES ES ES ES ES ES application services AS infrastructure services IS
29 service-oriented CreateQuote message bus CreateCustomer CalcQuote message bus message bus AddDriver AddVehicle CheckDMV message bus WriteAudit
30 service-oriented business services BS BS BS BS BS BS message bus process choreographer service orchestrator enterprise services ES ES ES ES ES ES application services AS infrastructure services IS maximize reuse maximize canonicality
31 service-oriented business services BS BS BS BS BS BS message bus process choreographer service orchestrator enterprise services ES ES ES ES ES ES application services AS infrastructure services IS incremental change operationally coupled
32 Microservice Architecture
33 domain driven design
34 bounded context +
35 microservices client requests client requests client requests api layer
36 microservices distributed client requests client requests client requests api layer
37 microservices separately deployed components client requests client requests client requests api layer
38 microservices service component client requests client requests client requests api layer
39 microservices bounded context client requests client requests client requests api layer
40 smart endpoints, dumb pipes < HTTP > < messaging >
41 standardize on integration, not platform embrace polyglot solutions where sensible too few languages/platforms too many languages/platforms Building Microservices DESIGNING FINE-GRAINED SYSTEMS Have one, two or maybe three ways of integrating, not 20. Sam Newman Building Microservices DESIGNING FINE-GRAINED SYSTEMS Standardize in the gaps between services - be flexible about what happens inside the boxes Sam Newman Building Microservices DESIGNING FINE-GRAINED SYSTEMS Pick some sensible conventions, and stick with them. Sam Newman
42 decentralized governance
43 decentralized data management ACID versus BASE
44 decentralized data management Building Microservices DESIGNING FINE-GRAINED SYSTEMS Avoid distributed transactions if at all possible Sam Newman
45 infrastructure automation
46 microservices service orchestration client requests client requests client requests api layer
47 microservices orchestration client requests client requests client requests api layer customer chg addr bulk txn recalc upd claim product inventory notification
48 microservices choreography client requests client requests client requests api layer customer chg addr bulk txn recalc upd claim product inventory notification
49 microservices client requests client requests client requests api layer maximize easy evolution
50 support Microservice is the first architectural style developed post-continuous Delivery.
51 microservice implementation PCI Level 1!!
52 evolutionary Components are deployed. Features are released. Applications consist of routing. production
53 evolutionary production
54 Dis-integrate services that monitoring shows are no longer used production
55 how big? release risk # services
56 Service-based Architecture
57 service-based is there a middle ground? service-oriented microservices service-based
58 service-based prag mat ic praɡˈmadik/ adjective adjective: pragmatic 1. dealing with things sensibly and realistically in a way that is based on practical rather than theoretical considerations.
59 service-based service granularity database scope integration hub
60 service-based service granularity client requests client requests client requests api layer
61 service-based service granularity client requests client requests client requests user interface layer
62 service-based service granularity single-purpose micro-service to "portion of the application" macro-service macro-services resolves orchestration and transactional issues allows for complex business processing within a service context -
63 service-based service granularity single-purpose micro-service to "portion of the application" macro-service services become harder to develop and test deployment pipeline requires more planning change control becomes more difficult -
64 service-based database scope client requests client requests client requests api layer
65 service-based database scope client requests client requests client requests user interface layer
66 service-based database scope single-purpose service-based database to globally shared application database reduces service orchestration and contract dependencies improves performance due to fewer remote calls refactoring entire database may not be feasible or possible -
67 service-based database scope single-purpose service-based database to globally shared application database looser bounded context of services tighter service coupling based on schema schema changes become expensive and difficult -
68 service-based integration hub client requests client requests client requests api layer lightweight message broker
69 service-based integration hub client requests client requests client requests user interface layer integration hub / middleware
70 service-based integration hub lightweight message broker to heavier integration hub allows for transformation of contract differences allows for non-transactional orchestration of services allows for protocol-agnostic heterogeneous interoperability allows for common processing logic across all services -
71 service-based integration hub lightweight message broker to heavier integration hub decrease in overall performance added complexity and cost increased need for governance deployment pipeline requires much more planning services become harder to develop and test -
72 what people really mean when they say microservice : A service based with domain emphasis but without the strictness of a pure microservice.
73 comparing: Micro Service-oriented Service-based
74 characteristics differences overall agility ability to respond quickly to constant change in both business and technology monolithic service-based overall agility H M L service-oriented microservices
75 characteristics differences ease of deployment promotes an effective and fast deployment pipeline; features are quick and easy to deploy monolithic service-based ease of deployment H M L service-oriented microservices
76 characteristics differences ease of testing ease at which features can be tested and verified; confidence level in completeness of testing monolithic service-based ease of testing H M L service-oriented microservices
77 characteristics differences overall performance which patterns relatively promote better performing applications? monolithic service-based level of performance H M L service-oriented microservices
78 characteristics differences overall scalability how well does the pattern lend itself to highly scalable applications? monolithic service-based level of scalability H M L service-oriented microservices
79 characteristics differences overall simplicity level of complexity in applications implemented using the pattern monolithic service-based level of simplicity H M L service-oriented microservices
80 characteristics differences ratings relative to each pattern service-oriented microservices service-based monolithic overall agility L H M L deployment L H M L testability L H M M performance L M M H scalability M H M L overall simplicity L M M H
81 service differences service-oriented microservices service-based service categorization service granularity service numbers service orchestration
82 service differences service categorization are services categorized or classified within the pattern? service-based microservices service-oriented no service categorization rigid service categorization
83 service differences service granularity what is the typical granularity of services within this pattern? microservices service-based service-oriented fine-grained coarse-grained
84 service differences service orchestration what level of service orchestration typically exists between services with this pattern? service-based microservices service-oriented minimal service orchestration maximum service orchestration
85 service differences service numbers what is the typical upper limit of the number of services found? microservices service-based service-oriented
86 service differences service-oriented microservices service-based service categorization yes no no service granularity small to very large very small small to medium service orchestration yes minimal generally no service numbers hundreds dozens thousands
87 Which?!?
88 Which?!? Monolith default easy to understand/build doesn t scale well in any dimension
89 Which?!? Service-oriented service taxonomy high degree of (potential) reuse highly compatible in integration-heavy environments operationally complex
90 Which?!? Microservices incremental change highly evolvable complex interactions
91 Which?!? service-based best target for migration good compromise domain-centric without going µservice
92 Which?!? it depends
93 domain/ isomorphism mechanical sympathy
94 nealford.com/videos nealford.com/books
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