Proactive Evolution management in Data-centric SW ecosystems - Acting on Change 2016

Proactive Evolution management in

Data –centric SW ecosystems

George [email protected]

“Athena” Research & Innovation Center

Proactive data management Workshop Acting on Change: New Approaches and Future Practices in

LTDPLondon, Dec 2016

Papastefanatos@ ProactiveDataManagement2016 2

SWEBOK Maintenance• Preventive maintenance: modification of a software product

after delivery to detect and correct latent faults in the software product before they become operational faults.

• Perfective maintenance: modification of a software product after delivery to provide enhancements for users, improvement of program documentation, and recoding to improve software performance, maintainability, or other software attributes

• Corrective maintenance: reactive modification (or repairs) of a software product performed after delivery to correct discovered problems.

• Adaptive maintenance: modification of a software product performed after delivery to keep a software product usable in a changed or changing environment.

Correction EnhancementProactive Preventive PerfectiveReactive Corrective Adaptive


Data-Centric SW ecosystems• Ecosystems of applications, built on

top of one or more databases and strongly dependent upon them

• Like all software systems, they too change…


Data-Centric SW ecosystems• … and often they fail to adapt…


Evolving data-intensive ecosystem


Evolving data-intensive ecosystemRemove CS.C_NAME

Add exam year



Add exam year

The impact can be syntactical (causing crashes)

Syntactically invalid



Add exam year

The impact can be syntactical (causing crashes), semantic (causing info loss or inconsistencies) and related to the performance

Semantically unclear

Syntactically invalid


Why is evolution so important?• Software and DB maintenance makes up for at least 50%

of all resources spent in a project.• Changes are more frequent than you think

– Data View: Databases change their internal structure, schema and semantics, due to changes on requirements, database technology or refactoring.

– Application View: Users / Applications change their view on collected data (e.g., reports, workflows).

– DBA and development teams do not sync well all the time

Databases are rarely stand-alone: typically, an entire ecosystem of applications is structured around themChanges in the schema can impact a large (typically, not traced) number of surrounding app’s, without explicit identification of the impact



Add exam year

Which parts are affected and how?



Add exam year

Can we predetermine their reaction?

Allow addition

Block Deletion

Allow Deletion


Evolving data-intensive ecosystem

Can we automatically repair?

Block DeletionRemove CS.C_NAME

Allow Deletion


Proactive management of data centric systems evolution

Achieve ecosystem evolution without impacting the smooth operation or the semantic consistency of its components


Proactive management of evolution• Model for Evolution

– Model & Visualize Dependencies between components

– Change modeling and monitoring

• Principled response to Evolution– Assess Impact of a Change– What if Analysis

• Design for evolution – Adapt to change – Quality Metrics– Self-Repairing


The Hecataeus tool & method


Annotate with Event & Rules


Played an impact analysis scenario: delete attr. ‘word’ from search_index

2. Queries Q215 and Q216 vetoed

1. The table allowed the deletion, but…


Played an impact analysis scenario: delete attr. ‘word’ from search_index

Rewrite the SW code to adjust to policies


Highlight most Vulnerable parts


Thank you

http://www.cs.uoi.gr/~pvassil/projects/hecataeus/

https://github.com/DAINTINESS-Group/Hecataeus

Demos and Material

The team

Dr. George PapastefanatosAthena Research & Innovation Center

Prof. Panos Vassiliadis University of Ioannina

Petros ManousisUniversity of Ioannina

http://www.cs.uoi.gr/~pvassil/projects/hecataeus/

https://github.com/DAINTINESS-Group/Hecataeus

Proactive Evolution management in Data-centric SW ecosystems - Acting on Change 2016

Technology

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