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cocktail d’expérience informatiquesGenève 3 & 4 octobre 2011
Seconde édition
Track
Auteur
Session
Java
Galder ZAMARREÑO
Data Grids andData Caching
soft-shake.ch
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Data Grids and Data Caching
Galder ZamarreñoSenior Software Engineer
Red Hat, Inc
3rd October 2011, Soft Shake
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Galder Zamarreño
• R&D Engineer, Red Hat Inc.• Infinispan developer• 5+ years exp. with distributed data systems• Twitter: @galderz• Blog: zamarreno.com
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Agenda
• What is Infinispan?• Infinispan as in-memory cache• Infinispan as in-memory data grid• Data-as-a-Service with Infinispan• Who uses Infinispan?
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Introducing
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What is Infinispan?
An in-memory, highly available, elastic, and open source (LGPL) data grid platform
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Infinispan can be used as...
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Local in-memory cache
Boost performance caching data which is hard to calculate or expensive to retrieve
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ConcurrentHashMap ?
Infinispan provides greater concurrency with MVCC, has built-in eviction...etc
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Local cache example
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A local cache might not be enough...
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Clustered caches
Scale up your application and maintain cache consistency
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Consistency in a clustered cache...
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Invalidation
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Invalidation
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Invalidation
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Cache-oriented operations...
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putForExternalRead()put() putForExternalRead()
Use for updating state Use to cache state read from external source
Regular lock acquisition timeout Fail-fast
Could throw an exception Fails quietly
Could cause existing transaction to fail
Will never affect existing transactions
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Accessing Infinispan caches
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Embedded Access
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Infinispan is not just a cache!
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In-memory data grid
It’s a Fast, Available, Distributed, Elastic data store, not just a cache!
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Invalidation won’t work for data grids!
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Data distribution
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Replication
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Distribution• With number of copies = 2
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How is data distributed??
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Consistent Hashing
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Solving unequal distribution
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Virtual Nodes
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Accessing Infinispan data grid
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Remote Access
• Via protocols :
• REST
• Hot Rod
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Hot Rod clients
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Infinispan as cloud data store
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Traditional 3-tier App
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Typical IaaS App
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Traditional PaaS App
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Where’s your data stored??
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Clouds are ephemeral!!
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State
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Virtualizing Data
Some public services exist (i.e. Amazon RDS), but not all cloud deployments are public!
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Build your own Data-as-a-Service!
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Characteristics of DaaS
Elastic, scalable and highly available!
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DaaS with Infinispan
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ArchitectureM
anage and Monitor
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Who uses Infinispan?
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As a cache...
Hibernate 2nd level cache, Torquebox Rails cache...
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As a temporary store...
Http session cache & EJB SFSB cache, in JBoss AS7
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As data grid...
Real-time trading app of a well known stock exchange
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What’s next?
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Towards EDG
Solidifying Infinispan towards integration with Red Hat’s Enterprise Data Grid
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Plus more data grid...
Enhancing Hot Rod protocol, Hibernate Object/Grid Mapper ...etc
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Summary
Infinispan as fast powerful local cache that can be clustered!
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Summary
But also a F.A.D.E. data grid, accessible in embedded or remote fashion
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Summary
Build your own Infinispan based Data-as-a-Service in your private cloud!
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Questions
infinispan.org - @infinispan
speakerrate.com/galder
More on data grids at 5pm!
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