##About Rootconf 2018 and who should attend:
Rootconf is India’s best conference on DevOps, SRE and IT infrastructure. Rootconf attracts systems and operations engineers to share real-world knowledge about building reliable systems.
The 2018 edition is a single track conference. Day 1 – 10 May – features talks on security. Colin Charles (chief evangelist at Percona Foundation), Pukhraj Singh (former national cybersecurity manager at UIDAI), Shamim Reza (open source enthusiast), Alisha Gurung (network engineer at Bhutan Telecom) and Derick Thomas (former network engineer at VSNL and Airtel Bharti) will touch on important aspects of infrastructure, database, network and enterprise security.
Day 2 – 11 May – is filled with case studies and stories about legacy code, immutable infrastructure, root-cause analysis, handling dependencies and monitoring. Talks from Exotel, Kayako, Intuit, Helpshift, Digital Ocean, among others, will help you evaluate DevOps tools and architecture patterns.
If you are a:
- DevOps programmer
- Systems engineer
- Architect
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you should attend Rootconf.
Birds Of Feather (BOF) sessions at Rootconf 2018 will cover the following topics:
- DevSec Ops
- Microservices - tooling, architecture, costs and culture
- Mistakes that startups make when planning infrastructure
- Handling technical debt
- How to plan a container strategy for your organization
- Evaluating AWS for scale
- Future of DevOps
Rootconf is a conference for practitioners, by practitioners.
The call for proposals is closed. If you are interested in speaking at Rootconf events in 2018, submit a proposal here: rootconf.talkfunnel.com/rootconf-round-the-year-2018/
##Venue:
NIMHANS Convention Centre, Lakkasandra, Hombegowda Nagar, Bengaluru, Karnataka 560029.
Schedule, event details and tickets: https://rootconf.in/2018
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Leena S N
@leenasn
Expand Contract Pattern for Continuous Delivery of Databases
Submitted Mar 10, 2018
Section:
Crisp Talk
Technical level:
Intermediate
Modifying the schema of a production database is hard. If something goes wrong, the impact on both customers and the team can be enormous. And it can be hard or even impossible to rollback a database schema change if things go wrong. And the same is true for any architectural change for a production application.
The Branch by Abstraction and Strangler Pattern makes significant application changes easier. Are there any similar patterns we can use to make production database changes less risky?
Indeed, there are. The Expand/Contract pattern is a blueprint for making the database migration. It makes the remodelling both reversible and safe. By expanding the application to accommodate both the old and the new schemas in parallel, we can give ourselves time to:
- Migrate any downstream dependencies on the old database schema
- Gain confidence that the migration is safe
We contract the application to the new version, once we’ve satisfied that the old schema is no longer needed.
The pattern helps to make significant, but necessary refactorings to your data model in a continuous delivery way. Most importantly, without threatening the robustness of your production applications.
While working with our product GoodKarma, I’ve successfully applied this pattern to make major changes to the core of the application, all while serving customers in production. I’ve learned some important lessons about how to best implement the Expand/Contract pattern.
In this session, I’ll share my experiences on how to avoid pitfalls and succeed at these kinds of major data remodelling with hardly any downtime.
Outline
Here is the mind-map of the talk:
Speaker bio
Leena is a CTO/Programmer @ Good Karma, Bangalore.
A pragmatic & passionate programmer, lean thinker, eXtreme Programming evangelist, hooked into Continuous Delivery and a mother of two lovely angels.
Links
- https://vimeo.com/210631471
- https://hasgeek.tv/rootconf/2016/1210-merge-hells-feature-toggle-to-the-rescue
Slides
https://www.slideshare.net/leenasn/expand-contract-pattern-continuous-delivery-and-databases
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