introducing apache geode and spring data gemfire
TRANSCRIPT
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Introducing Apache Geode with Spring Data GemFireJohn Blum / Luke Shannon
24 June 2015
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Agenda
What is Apache Geode? Apache Geode Technical Specification High-level Implementation Details Spring Data GemFire Q&A
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Pivotal GemFireWhat is Apache Geode?
In a nutshell…– Open Source core of Pivotal GemFire– Apache Incubator
▪ https://wiki.apache.org/incubator/GeodeProposal
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What is Apache Geode?One definition is…A distributed, in-memory compute and data management platform that elastically scales to achieve high-throughput, low-latency access to big, fast data in order to power business critical, analytical applications in real-time.
Nodes
Ops / SecLinear scalability
Elastic capacity +/-
Latency optimizeddata distribution
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What is Apache Geode? Technically…
– Distributed, in-memory database (IMDG) with ACID properties
– Transactional Key/Value Store (Cache)
– Glorified-version of ConcurrentHashMap
– Message Bus with guaranteed message delivery▪ Reliable, asynchronous event notifications
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What Apache Geode Does? Enables new or existing Java applications to operate at cloud-scale
with predictable, low-latencies and be highly-available without sacrificing consistency.
Applications can transact and analyze Big Data in real-time to garner insights and achieve meaningful and impactful business results.
App
App
App
App
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Apache Geode Characteristics In-Memory
Distributed
Consistent
Highly-Available / Fault Tolerant
High-Throughput / Low, Predictable Latency
High Scalability
Data-aware Parallel Compute
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How are Apache Geode’s features implemented?
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Memory Geode stores data in memory…
– JVM Heap– Off-Heap (Native Memory)
Geode (optionally) stores data to disk– Persistence + Overflow
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ManagementMemory
Eviction (LRU)
Expiration (Region & Entry TTL/TTI)
Automatic resource management (critical & eviction Heap %)
Region Compression (Snappy)
JVM GC Tuning
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IMDG An In-Memory Data Grid (IMDG), such as Apache Geode…
– Pools system resources across multiple nodes in a cluster to manage both application state and behavior.
– Memory, CPU, Network and (optional) Disk
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High-Throughput / Low-Latency Geode uses concurrent, in-memory data structures with a highly
optimized distribution infrastructure to minimize context switching and contention.– synchronous/asynchronous replication for high read throughput
– partitioning for both high read and write throughput
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Shared-Nothing Disk Persistence Architecture Manages data in local disk files on each node in the cluster
independently from other nodes– Members are self-sufficient; Members do not share memory or disk;– Data/Transactions appended to Oplog files– Compaction
Design goals (all about In-Memory)…– Minimize IO operations (Write-Behind vs. Write-Through)– Minimize locking– Minimize serialization
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REPLICATE & PARTITION RegionsHigh Availability
Data is partitioned across nodes in the cluster and distributed uniformly– Rebalanced as nodes join/leave– Redundant copies
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Persistence – Shared NothingServer 3Server 2
Bucket 3*primary*
Bucket 1secondary
Bucket 3secondary
Bucket 2*primary*
Server 1
Bucket 2secondary
Bucket 1*primary*
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Persistence – Shared NothingServer 1 Server 3Server 2
Bucket 2secondary
Bucket 1*primary*
Bucket 3*primary*
Bucket 1secondary
Bucket 3secondary
Bucket 2*primary*
What if a server crashes?
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Persistence – Shared NothingServer 1 Server 3Server 2
Bucket 2secondary
Bucket 1*primary*
Bucket 3*primary*
Bucket 1*primary*
Bucket 3secondary
Bucket 2*primary*
Bucket 2secondary
Primary Failover
RestoreRedundancy
Bucket 1secondary
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Network Partitions
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Partition RegionsConfigurable Consistency
Redundant Copies – 0 to 3
Colocation
Total Number of Buckets– 113 (Default)
Local Max Memory– 90% of Heap
Total Max Memory– All Members, Both Primary/Secondary
Copies
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REPLICATE vs. PARTITIONConfigurable Consistency
Partition Regions– Updates routed through primary bucket– Holds lock on key when distributing updates
Replicate Regions– Possible conflicts due to out-of-order updates– Conflict checking (--concurrency-checks-enabled)
ReplicatedPartitioned Disabled
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Apache Geode Topologies
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Peer-to-Peer (P2P)Apache Geode Topologies
Configuration with the Cache embedded in the application process– Close proximity of application logic and data
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Client/ServerApache Geode Topologies
Single-Hop Data Access
Continuously load balanced between servers to get the best response-times
`
Automatic fail-over when servers crash or become unresponsive
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WANApache Geode Topologies
Site-to-Site Replication for DR
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Use CasesApache Geode
Persistent OLTP/OLAP– System of Record (SOR)
Caching with JSR-107 (JCache) or Spring Cache Abstraction HTTP Session State Management
– Caching and Replication
Distributed L2 Caching for Hibernate Memcached Server (Gemcached)
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Additional FeaturesApache Geode
Functions– Application logic is distributed, routed and run in parallel with close proximity to the data required by the
application.
Serialization (PDX)
Delta-propagation – difference of new/old value
JTA-compliant Transactions
Security – SSL, Auth
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RoadmapApache Geode
HDFS persistence Off-Heap storage Lucene search/indexing Spark integration Cloud Foundry service
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InterfaceApache Geode
Language Support– Native: Java, C/C++, C#– Non-native: JavaScript, Python,
Ruby, Scala, etc
API– Java HashMap (Region)– OQL / Function– Memcache client– REST API– Spring Data GemFire
Data Structure– User-defined Classes / POJOs– Portable Data Exchange (PDX) – Documents (JSON)
Powerful Data Access– Object Query Language (OQL)– Data-aware, Scatter-Gather
Functions– Publish/Scribe framework for RI/CQs
with reliable, async event queues
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Spring Data GemFirehttp://projects.spring.io/spring-data-gemfire/
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So… Why Spring?
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“Simple things should be simple; complex things should be possible”
– Alan Kay
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Spring Data GemFire (SDG)Consistently applies Spring's powerful, non-invasive programming model to simplify configuration and development with Apache Geode.
Spring Ecosystem Integration…– Spring Cache Abstraction / Transaction Management– Spring Data Commons + REST– Spring Integration (Inbound/Outbound Channel Adapters)– Spring XD (Input Source and Sinks)
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Apache Geode combined with Spring Data GemFire can be used as JSR-107 (JCache) caching provider
+ +
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GRAILS
Full-stack, Web
XD
Stream, Taps, Jobs
BOOT
Bootable, Minimal, Ops-Ready
Big, Fast,
FlexibleData Web,
Integration,Batch
WEB
Controllers, REST,WebSocket
INTEGRATION
Channels, Adapters,Filters, Transformers
BATCH
Jobs, Steps,Readers, Writers
BIG DATA
Ingestion, Export,Orchestration, Hadoop
DATA
NON-RELATIONALRELATIONAL
CORE
GROOVYFRAMEWORK SECURITY REACTOR
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Use Cases / ConfigurationsSpring Data GemFire
Apache Geode Configuration / Bootstrapping– Replacement for cache.xml; Can be used with Cluster Configuration
Application Peer (Cache) Application Client (ClientCache)
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Examples…SDG-based Configuration
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with SpringBootstrapping Apache Geode
@SpringBootApplication@ImportResource("/spring-data-gemfire-cache.xml")@EnableGemfireRepositories@EnableTransactionManagementpublic class SampleDataGemFireApplication { public static void main(String[] args) { SpringApplication.run(SampleDataGemFireApplication.class, args); }}
Or…gfsh>start server –name=Example … --spring-xml-location=“<classpath-to-spring-application-context.xml>”
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Basic (Region) Data AccessData Access with Spring
@Repositorypublic class CustomerDao {
@Resource(name = “Example”) private Region<?, ?> example; …}
Example…
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GemfireTemplateData Access with Spring Data GemFire
Advantages…– Simple, Convenient Data Access (CRUD, OQL, Function)– Protects developer from GemFire/Geode API changes – Exception Translation into Spring DAO Exception Hierarchy– Transaction Management
<bean name=“customersTemplate” class=“org.springframework.data.gemfire.GemfireTemplate” p:region-ref=“Customers”>
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GemfireRepositoryData Access with Repositories
public interface CustomerRepository extends GemfireRepository<Customer, Long> {
}
// Spring context.xml<gfe-data:repositories base-package="org.example.app.customer.dao.repo"> <repo:include-filter type="assignable" expression=”org.example.app.customer.dao.repo.CustomerRepository"/></gfe-data:repositories>
Example…
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Implementation
Annotation-based Function Implementation/Execution
package org.example.app.functions;
import …
@Componentpublic class ExampleFunctions {
@GemfireFunction public Customer update(…) { … } …}
Example…
(Optional)…
<bean class=“org.example….ExampleFunctions”/>
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Execution
Annotation-based Function Implementation/Execution
package org.example.app.function.executions;
import …
@OnRegion(“Example”)public interface ExampleFunctionExecution { Customer update(…);}
And…<gfe:annotation-driven/>
<gfe-data:function-executions base-package="org.example.app.function.executions">
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Execution
Annotation-based Function Implementation/Execution
Additionally…– @OnServer(s), @OnMember(s)
Examples…
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JSR-107 (JCache), Spring Cache AbstractionGeode Caching Provider
With @Cacheable And @CachePut, @CacheEvict(allEntries=[true|false]), @CacheConfig
– http://docs.spring.io/spring/docs/current/spring-framework-reference/htmlsingle/#cache-jsr-107
Or with JSR-107 using…– @CacheResult, @CachePut, @CacheRemove, @CacheRemoveAll,
@CacheDefaults
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DemoBy Luke Shannon
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On the horizon…
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RoadmapSpring Data GemFire
Support for GemFire 8.2 & 9.0– HDFS, Off-Heap, Apache Lucene, Spark
Support for pre-defined data sets using Snapshot Service– SGG-408
Expiration annotation support with CustomExpiry– SGF-404
Spring Session Adapter for GemFire/Geode– SGF-373
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Roadmap Continued…Spring Data GemFire
Repository Query method annotation extensions...– SGF-392
public interface ExampleRepository implements GemfireRepository<Customer, Long> {
@Trace @Limit(20) @Import(“org.example.app.domain.SomeOtherType”) List<Customer> findByLastname(String lastName);
}
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Get Involved…
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Apache GeodeContribute
In addition to developing Spring applications with Apache Geode, now is a perfect time to get involved in the Apache Geode community and contribute growing Apache project from the ground-up.– Ways to participate…
http://geode.incubator.apache.org/contribute/
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Finally…
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Washington, DC – September 14 – 17, 2015SpringOne2GX
Early Bird price registration ends August 14th, Register Now!– https://2015.event.springone2gx.com/register
Building High-Scalable Spring Applications with Distributed In-Memory Data Grids.– Luke Shannon & John Blum– Tuesday, September 15th, 2015– https://2015.event.springone2gx.com/schedule/sessions/
building_highly_scalable_spring_applications_with_in_memory_distributed_data_grids.html
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References http://geode.incubator.apache.org/ http://geode.incubator.apache.org/contribute/ https://github.com/project-geode/docs/wiki https://github.com/apache/incubator-geode https://pivotal.io/big-data/pivotal-gemfire http://gemfire.docs.pivotal.io/latest/userguide/index.html#getting_started/topics/gemfire_overview.html http://gemfire.docs.pivotal.io/latest/javadocs/japi/index.html http://stackoverflow.com/questions/tagged/geode+or+gemfire http://projects.spring.io/spring-data-gemfire/ http://docs.spring.io/spring-data-gemfire/docs/1.6.0.RELEASE/reference/html/ http://docs.spring.io/spring-data-gemfire/docs/current/reference/html/ http://docs.spring.io/spring-data-gemfire/docs/current/api/ https://github.com/spring-projects/spring-data-gemfire https://github.com/spring-projects/spring-gemfire-examples http://stackoverflow.com/questions/tagged/spring-data-gemfire
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Q&AAny questions…
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Thank you!