Wednesday, 24 January 2018

What happened to the replication queue?

Recently I saw an Infinispan user that was having issues using the replication queue, a clustering functionality that had been part of Infinispan since it’s first release. Looking at the latest Infinispan codebase I realised it wasn’t there any more, what happened to it?

The aim of the replication queue was to batch individual cache operations and send them as one to other nodes, rather than sending them each operation individually.

Over time we started considering whether the replication queue could be removed:

  1. The replication queue was duplicating functionality: JGroups, which manages the group communication layer, already bundles messages and the network stack can do it too.

  2. Using the replication queue was not more efficient because when the message is delivered in the remote node, the messages are processed sequentially. If processing first message blocks, the other commands are not processed until it finishes.

  3. It can add complexity if messages with different order requirements come in same batch, e.g. no order, FIFO or total.

In essence, Infinispan’s replication queue was doing the same as JGroups' message bundler. Whereas JGroups' message bundler had been evolving and different options had been developed, Infinispan’s replication queue was still using same algorithm as in its first release.

So in Infinispan 8.2 the replication queue was deprecated and in 9.0 it was finally removed. If you ever find the need to batch your changes, configure JGroups' message bundler.

Cheers, Galder

Posted by Galder Zamarreño on 2018-01-24
Tags: replication queue

News

Tags

JUGs alpha as7 asymmetric clusters asynchronous beta c++ cdi chat clustering community conference configuration console data grids data-as-a-service database devoxx distributed executors docker event functional grouping and aggregation hotrod infinispan java 8 jboss cache jcache jclouds jcp jdg jpa judcon kubernetes listeners meetup minor release off-heap openshift performance presentations product protostream radargun radegast recruit release release 8.2 9.0 final release candidate remote query replication queue rest query security spring streams transactions vert.x workshop 8.1.0 API DSL Hibernate-Search Ickle Infinispan Query JP-QL JSON JUGs JavaOne LGPL License NoSQL Open Source Protobuf SCM administration affinity algorithms alpha amazon anchored keys annotations announcement archetype archetypes as5 as7 asl2 asynchronous atomic maps atomic objects availability aws beer benchmark benchmarks berkeleydb beta beta release blogger book breizh camp buddy replication bugfix c# c++ c3p0 cache benchmark framework cache store cache stores cachestore cassandra cdi cep certification cli cloud storage clustered cache configuration clustered counters clustered locks codemotion codename colocation command line interface community comparison compose concurrency conference conferences configuration console counter cpp-client cpu creative cross site replication csharp custom commands daas data container data entry data grids data structures data-as-a-service deadlock detection demo deployment dev-preview development devnation devoxx distributed executors distributed queries distribution docker documentation domain mode dotnet-client dzone refcard ec2 ehcache embedded embedded query equivalence event eviction example externalizers failover faq final fine grained flags flink full-text functional future garbage collection geecon getAll gigaspaces git github gke google graalvm greach conf gsoc hackergarten hadoop hbase health hibernate hibernate ogm hibernate search hot rod hotrod hql http/2 ide index indexing india infinispan infinispan 8 infoq internationalization interoperability interview introduction iteration javascript jboss as 5 jboss asylum jboss cache jbossworld jbug jcache jclouds jcp jdbc jdg jgroups jopr jpa js-client jsr 107 jsr 347 jta judcon kafka kubernetes lambda language learning leveldb license listeners loader local mode lock striping locking logging lucene mac management map reduce marshalling maven memcached memory migration minikube minishift minor release modules mongodb monitoring multi-tenancy nashorn native near caching netty node.js nodejs non-blocking nosqlunit off-heap openshift operator oracle osgi overhead paas paid support partition handling partitioning performance persistence podcast presentation presentations protostream public speaking push api putAll python quarkus query quick start radargun radegast react reactive red hat redis rehashing releaase release release candidate remote remote events remote query replication rest rest query roadmap rocksdb ruby s3 scattered cache scripting second level cache provider security segmented server shell site snowcamp spark split brain spring spring boot spring-session stable standards state transfer statistics storage store store by reference store by value streams substratevm synchronization syntax highlighting tdc testing tomcat transactions tutorial uneven load user groups user guide vagrant versioning vert.x video videos virtual nodes vote voxxed voxxed days milano wallpaper websocket websockets wildfly workshop xsd xsite yarn zulip

back to top