consistenthash command

Package main provides simple consistenthash commandline utility.

Demo:

$ seq -f node-%.f 1 100 > /tmp/nodes
$ consistenthash < /tmp/nodes apple
node-42
$ consistenthash < /tmp/nodes banana
node-48
$ consistenthash < /tmp/nodes chocolate
node-2

Modify /tmp/nodes and confirm that the result rarely changes.