Introducing Infinispan

• Mircea Markus• Senior Software Engineer• Red Hat, Inc

Mircea Markus

• R&D Engineer, Red Hat Inc.• Twitter: @mirceamarkus• Blog: mirceamarkus.blogspot.com

Agenda

• What is Infinispan• API

• Key features• Three use cases• The path ahead

What is Infinispan?

• Distributed, in memory, data structure• Highly available• Elastic• Open source

Distributed data structure

High availability

• Memory is volatile• Make redundant copies

• Total replication (Replication Mode)• Partial replication (Distribution Mode)

• Topology changes• Node will crash!• Re-arrange state

Elasticity

• Expect• Node additions• Node removals

• Topology changes • are totally consistent• do not "stop the world"

API

• Key-value store• java.util.concurrent.ConcurrentHashMap• JSR-107 compliant• CDI support

Key features

• Transactions• Persistence• Map/Reduce• Querying

Transactions

• JTA transactions support• XA or Synchronization based enlistment• recovery!

• Local transactions (batching)• Transactional modes

• optimistic • pessimistic

Persistence/Cache Store

• Used for• durability• increased storage• warm caches

• Various implementations• jdbc, bdbje, file, cloud, remote/infinispan, cassandra

• Extensible

Map/Reduce example

Map/Reduce

Map/Reduce

Querying

• What’s in C7?

• Where is the white king?

Querying

• Based on Hibernate Search/Lucene• Objects in the grid are indexed

• index management

Use cases

• Local cache• Cluster of caches• Autonomous data store

• access protocols

Local cache

Features of a local cache

• Eviction• Expiry• Write through, write behind• Preloading• Notifications• Statistics

Local cache not good enough...

Cluster of caches

Some limitations still

• Client is affected by cache topology changes• Shared resources• Tier management

• incompatible JVM tuning• security• garbage collection

• Non-JVM clients

Cache servers

Client/Server protocols

• REST• Memcached• Hotrod

• proprietary• java, python, ruby

The path ahead

• 5.2• transactions performance• non-blocking state transfer• hotrod enhancements

• 6+• X-datacenter replication• eventual consistency• continuous queries

Thank you!

• infinispan.blogspot.com• @infinispan• mirceamarkus.blogspot.com• @mirceamarkus