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Peter Zaitsev, CEO

Choosing Right Open SourceDatabase

September 5th, 2018

Percona Technical Webinars

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Open Source Databases

You do not need convincing to chose Open

Source Database ?

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DB-Engines Ranking

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Open Source vs Commercial

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Stack Overflow Developers Survey

Source: https://insights.stackoverflow.com/survey/2018/

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Choose Database or Databases ?

There is no perfect database for every use case

Engineering Tradeoffs Ensure It

Large Applications often built using Multiple Databases

“Polyglot Persistence”

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Things to Consider

Majority of applications are not Google or Facebook

Majority of companies does not have their Team and Resources

Their approaches might not be Fit for You

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Limit yourself

Start with one Database Technology

Add more technologies when Absolutely Essential

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There is

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Boring is Good

Boring = Proven

Proven = Less Problems

What is Good for you ?

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So ?

How Do I chose small number of boring but popular Open Source Databases to build my application in non-Facebook Way ?

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Buzz Words

Relational (SQL) No-SQL NewSQL

Big Data Multi-Model

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Popular NoSQL Categories • RedisKey Value Store• MongoDBDocument Store• CassandraWide Column Store• ElasticSearch Engine• Neo4jGraph• InfluxDBTime Series

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Cross-Polynation

MySQL, PostgreSQL add Document Storage Support

Many databases provide SQL or SQL-like language support

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Relational Databases

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Relational: SQL

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Relational Variants

• Good for reading few data points • Easy to modify data• Conventional “Web” Applications

Row Store

• Good for mass data analyses • Data best modified in bulks • Reporting/Analytics

Column Store

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Document Data Model Example

Source: https://www.tutorialspoint.com/mongodb/mongodb_insert_document.htm

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Other Questions

“Disk” vs “Memory”

Single Node vs Distributed

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Q1: Application Data Model

What Database your application Data Model and Operations Bests maps to ?

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Not too Obvious Things to Consider

Application Life Cycle and Development Process

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Q2: Scale

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Understanding Scaling

Any Technology Scales, Just with different

efficiency and amount of pain

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Q3: It is not just about development

Technology Long Term Viability

Availability of Commercial Support

Corporate Policies

Compliance (Security, Auditing etc)

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Understanding Open Source

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I am not a Lawyer

This is my general understanding, do not expect 100% correctness of every legal detail. Also laws are different worldwide

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Free Software - 4 Freedoms• The freedom to run the program as you wish, for any purpose

(freedom 0).• The freedom to study how the program works, and change it so it

does your computing as you wish (freedom 1). Access to the source code is a precondition for this.

• The freedom to redistribute copies so you can help others (freedom 2).

• The freedom to distribute copies of your modified versions to others (freedom 3). By doing this you can give the whole community a chance to benefit from your changes. Access to the source code is a precondition for this.

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Open Source Licenses

https://en.wikipedia.org/wiki/Permissive_software_licence

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Open Source License

•Restrict non Open Source Distribution of Derivative work

Restrictive Licenses (GPL,

AGPL)

•Can re-license Derivative work as Proprietary License

Permissive Licenses (BSD,

Apache 2.0, MIT)

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How is Network Treated

GPL

•Is not considered Distribution

AGPL

•Is considered Distribution

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Governance

Community/Foundation Commercial Entity

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Commercial Services

Not Every Open Source Project has commercial Support and Services Available

For Popular Software one or several vendors emerge

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Practical Question

Ask: What Will I need to give up if I stop paying ?

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Open Source as in Marketing

“Open Source” often used for Marketing not Entirely Open Source Software

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Important Notice

I support all Software Licensing Methods and

Business Models. I strongly Dislike Bait and

Switch

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Open Core

•MySQL•MongoDB

You Market “Open

Source” but sell

Proprietary Version

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Open Source Compatible

Close Source or Cloud Software which promises compatibility with Open Source Software

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Source Available

Available Source code (ie on GitHub) does not mean you’re licensed to use it

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Trapware Business Models

Make it easy to install non-open source software thinking it is free software

Sales team can catch you out of compliance and demand random money

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BSL (Business Source License)

Open Source…. Eventually

Promise for Software to become Open Source after some years

… by that time it will be long unsupported

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Commons Clause

Addition to Open Source License… which makes it non Open Source

Apache 2.0 with Commons Clause is not Open Source License

Restricts getting any commercial services from anyone but copyright holder

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Percona’s Stance

All software we distribute is 100% Free and Open Source

No “Better” Enterprise Software Version

No Games & Tricks

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Summary

Know your Requirements to Open Source Software

Understand what you’re getting

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Thank You!