Introducing KSQL: Streaming SQL for Apache Kafka | Confluent
What does it even mean to query streaming data, and how does this compare to a SQL database? Well, it’s actually quite different to a SQL database. Most databases are used for doing on-demand lookups and modifications to stored data. KSQL doesn’t do lookups (yet), what it does do is continuous transformations— that is, stream processing. For example, imagine that I have a stream of clicks from use
Using logs to build a solid data infrastructure (or: why dual writes are a bad idea) | Confluent
This is an edited transcript of a talk I gave at the Craft Conference 2015. The video and slides are also available. How does your database store data on disk reliably? It uses a log. How does one database replica synchronise with another replica? It uses a log. How does a distributed algorithm like Raft achieve consensus? It uses a log. How does activity data get recorded in a system like Apache
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