choosingrightopen source database · © 2018 percona. 1 peter zaitsev, ceo choosingrightopen source...
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© 2018 Percona. 1
Peter Zaitsev, CEO
Choosing Right Open SourceDatabase
September 5th, 2018
Percona Technical Webinars
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© 2018 Percona. 2
Open Source Databases
You do not need convincing to chose Open
Source Database ?
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© 2018 Percona. 3
DB-Engines Ranking
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© 2018 Percona. 4
Open Source vs Commercial
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© 2018 Percona. 5
Stack Overflow Developers Survey
Source: https://insights.stackoverflow.com/survey/2018/
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© 2018 Percona. 6
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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© 2018 Percona. 8
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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© 2018 Percona. 12
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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© 2018 Percona. 19
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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© 2018 Percona. 21
Not too Obvious Things to Consider
Application Life Cycle and Development Process
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Q2: Scale
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© 2018 Percona. 23
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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© 2018 Percona. 25
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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© 2018 Percona. 27
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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© 2018 Percona. 28
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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© 2018 Percona. 30
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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© 2018 Percona. 35
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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© 2018 Percona. 38
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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© 2018 Percona. 40
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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© 2018 Percona. 42
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!