Cloudflare are running a 40-machine, 50TB Kafka cluster, ingesting at 15 Gbps, for log processing. Also: Go producers/consumers, capnproto as wire format, and CitusDB/Postgres to store rolled-up analytics output. Also using Space Saver (top-k) and HLL (counting) estimation algorithms.
a command line tool for JVM diagnostic troubleshooting and profiling.
‘Simplistic interactive filtering tool’ — live incremental-search filtering in a terminal window
Links for 2015-06-25
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