Hazelcast – Map Reduce & Aggregations MapReduce is a computation model which is useful for data processing when you have lots of data and you need multiple machines, i.e., a distributed environment to calculate data. It involves ”map”ing of data into key-value pairs and then ”reducing”, i.e., grouping these keys and performing operation on the […]

Hazelcast – Monitoring Hazelcast provides multiple ways to monitor the cluster. We will look into how to monitor via REST API and via JMX. Let”s first look into REST API. Monitoring Hazelcast via REST API To monitor health of the cluster or member state via REST API, one has to enable REST API based communication […]

Hazelcast – Setting up multi node instances Given that Hazelcast is a distributed IMDG and typically is set up on multiple machines, it requires access to the internal/external network. The most important use-case being discovery of Hazelcast nodes within a cluster. Hazelcast requires the following ports − 1 inbound port to receive pings/data from other […]