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Apache Kafka: Apache Software Foundation: 0.10.20 2017-02 Free / Commercial support available Yes Apache Software License: Apache ServiceMix Apache Software Foundation: 7.0 2017-01 Free / Commercial support available Yes Apache Software License: Apache Synapse: Apache Software Foundation: 3.0 2016-12 Free / Commercial support available Yes
Direct Connect hubs are central servers to which clients connect, thus the networks are not as decentralized as Gnutella or FastTrack. Hubs provide information about the clients, as well as file-searching and chat abilities. File transfers are done directly between clients, in true peer-to-peer fashion. Hubs often have special areas of interest.
Apache Kafka is a distributed event store and stream-processing platform. It is an open-source system developed by the Apache Software Foundation written in Java and Scala.The project aims to provide a unified, high-throughput, low-latency platform for handling real-time data feeds.
In databases, change data capture (CDC) is a set of software design patterns used to determine and track the data that has changed (the "deltas") so that action can be taken using the changed data.
Samza allows users to build stateful applications that process data in real-time from multiple sources including Apache Kafka. Samza provides fault tolerance, isolation and stateful processing. Unlike batch systems such as Apache Hadoop or Apache Spark , it provides continuous computation and output, which result in sub-second [ 3 ] response times.
Apache ZooKeeper is an open-source server for highly reliable distributed coordination of cloud applications. [2] It is a project of the Apache Software Foundation.. ZooKeeper is essentially a service for distributed systems offering a hierarchical key-value store, which is used to provide a distributed configuration service, synchronization service, and naming registry for large distributed ...
Apache Accumulo extends the Bigtable data model, adding a new element to the key called Column Visibility.This element stores a logical combination of security labels that must be satisfied at query time in order for the key and value to be returned as part of a user request.