Integration / Apache Pulsar Interview questions

What is tiered storage in Pulsar?

Tiered storage lets Pulsar automatically offload older message segments from BookKeeper to cheaper, long-term storage like Amazon S3, Google Cloud Storage, or Azure Blob once they age past a configured threshold.

Offloaded segments remain fully readable through the same topic and consumer APIs - Pulsar transparently fetches them from the offload target when a consumer needs to read that far back - so there's no separate archive workflow to manage.

This decouples retention length from BookKeeper disk cost, letting teams keep months or years of history queryable without provisioning that much expensive replicated disk on the bookies themselves.

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Tiered storage offloads old segments to: a second ZooKeeper instance

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cheaper cloud object storage like S3

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the producer's local disk

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Offloaded data remains: transparently readable through normal topic APIs

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only readable via a separate archive tool

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permanently inaccessible

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What is AppDynamics? Explain about Apache Pulsar. What is Apache Pulsar? What is a Pulsar broker? What is Application Performance Monitoring (APM)? What is Apache BookKeeper? What are the core components of the AppDynamics platform? What is the Controller in AppDynamics? What are tenants and namespaces in Pulsar? What is an App Agent in AppDynamics? What is a topic in Pulsar? What are the types of agents available in AppDynamics? What is a producer in Pulsar? What is a Business Transaction in AppDynamics? What is a consumer in Pulsar? What is a subscription in Pulsar? What is a Tier in AppDynamics? What is a Node in AppDynamics? Define a partitioned topic in Pulsar? What is Pulsar's metadata store used for? What is a Business Application in AppDynamics? What is the Application Flow Map? What are Pulsar Functions? What is a Health Rule? What is Pulsar IO? Describe geo-replication in Pulsar? What is a Policy in AppDynamics? What is tiered storage in Pulsar? 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