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2 posts

Securing Private-Corpus Queries: ACLs, Deletion Propagation, and Freshness

Authorization must take effect before candidate generation, while ACLs, deletion events, and source versions must propagate to every derived index; freshness needs measurable event-time SLOs too.

Apache Pulsar: An Event Platform Separating Stateless Brokers from BookKeeper Storage

Pulsar separates serving from storage: stateless brokers handle connections while BookKeeper stores ledgers and subscription cursors. Elasticity and multi-tenancy come with more operational components.