Uncoupling Systems
summary
Kenna Security migrates a monolith into queues, background workers and materialized views, using Redis as a readthrough cache, ElasticSearch for search indices and BigQuery for batch analytics. Databases get partition by client sharding to avoid hotspots, ActiveRecord still handles local transactions, and CSV change-sets feed fact tables. The claim: precompute and serialize expensive work, make jobs retriable and idempotent, and this design solves roughly 90% of scaling pains while trading eventual consistency for availability.
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