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SQL and NoSQL Databases in the Cloud Conference
- 1. The Data Warehouse Institute DW Conference 2014
Zurich – 17/18.11.14
bit.ly/go4bluemix
© 2013 IBM Corporation
SQL and NoSQL Databases in the cloud
Twitter: @RomeoKienzler
Romeo Kienzler – IBM Innovation Center Zurich
- 2. BlueMix is a Platform as a Service Cloud,
based on Cloud Foundry, employing Enterprise
grade services enriched with IBM Software and
hosted at SOFTLAYER
bit.ly/go4bluemix
2 © 2013 IBM Corporation
- 5. Advantages of Database-as-a-Service (DBaaS)
Design
Admin
Software
Hardware
Design
Admin
Software
Design
Guesswork, Overhead,
Risk
5
✓ Guaranteed
✓ No Guesswork
✓ Smallest Risk
✓ Greatest Productivity
Do-It-Yourself Hosted DBaaS
© 2014 IBM Corporation
- 6. Cloudant is Used by Big Web & Big Mobile Leaders
• 17,000 users
• Billions of
daily transactions
• Millions of DBs
• Across 34 DCs on
5 Cloud providers
eCommerce
Online Education
Gaming
Financial Services
Networking
Other Industries
© 2014 2013 IBM Corporation
- 7. Why cloud?
● Elasticity of
● Storage
● → Increase Ratio „disks per system“
● Processing power
● → Increase Ratio „cpu per disk“
● Cache
● → Increase Ratio „memory per storage unit“
● Automatic Backups
● Automatic Disaster Recovery
● Automatic Maintenance
7 © 2013 IBM Corporation
- 8. Implications?
● Data partitioning
● Complete data corpus resides on multiple
● Systems
● Disks
● Query / Transaction touches multiple
● Systems
● Disks
● Disk and System failures during runtime
● „Hot“ System and Disk removement / addition
8 © 2013 IBM Corporation
- 9. ACID vs CAP vs BASE
● ACID
● Atomicity (all or nothing)
● Consistency (never leave system in invalid state)
● Isolation (cope with nondeterminism)
● Durability (never loose data after commit)
● CAP Theorem
● Consistency (basically what ACID describes)
● Availability (always respond to every request)
● Partition Tolerance (tolerant to node failure)
● BASE
● Basically Available (but response negative/wait)
● Soft State (not always 100% consistent state)
● Eventually Consistent (on stop, sooner or later)
9 © 2013 IBM Corporation
- 10. Isolation vs. Consistency
● ACID
● Read Uncommited
● Read Commited
● Repeatable Read
● Serializable
● BASE
● Monotonic read
Once read, never read older version
● Monotonic write
Write order in all replicas is preserved
● Read your own writes
Once written, never read older version
10 © 2013 IBM Corporation
- 11. Live Demos
● You choose now using the Voting – APP :)
bit.ly/go4bluemix
11 © 2013 IBM Corporation
