Java 11 - Enable Java Flight Recorder JVM option example
1 2 3 4 5 6 -XX:StartFlightRecording=\ disk=true, \ dumponexit=true, \ filename=recording.jfr, \ maxsize=1024m,\ maxa...
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Spark - join transformation
join—Equivalent to an inner join in RDBMS, this returns a new pair RDD with the elements (K, (V, W)) containing all possible pairs of values from the first a...
C++ - GDB init profile setting in Linux
1 2 3 4 5 $ cat ~/.gdbinit set history save on set print pretty on set pagination off set confirm off
Cassandra - Docker run example for Cassandra version 2.1 with PropertyFileSnitch
1 sudo docker run -d -v /mnt/ramdisk/:/var/lib/cassandra/ -e CLUSTER_NAME=TEST -e CASSANDRA_ENDPOINT_SNITCH=PropertyFileSnitch -p 9160:9160 -p 9042:9042 -p 7...
Kubernetes - How Flannel network works
Software based packet routing mechanism without NAT. https://blog.laputa.io/kubernetes-flannel-networking-6a1cb1f8ec7c