oom.sh

#!/bin/bash

CLUSTER_NAME=oom
NUM_NODES=10
LOW_MEM_NODES=5
RF=3

function prepend {
  cat $1 | pbcopy && echo -e "$2" > $1 && pbpaste >> $1
}

#ccm stop
killall -9 java
ccm remove ${CLUSTER_NAME}
ccm create ${CLUSTER_NAME} -n ${NUM_NODES}:0 -i 127.0.0. -b -v 1.2.15

for i in `seq 1 ${NUM_NODES}`; do
  sudo ifconfig lo0 alias 127.0.0.$i up
done

c=0
for f in ~/.ccm/${CLUSTER_NAME}/node*; do
  c=$[$c + 1]
  prepend $f/conf/cassandra-env.sh "MAX_HEAP_SIZE=\"20M\"\nHEAP_NEWSIZE=\"10M\"\n"
  sed -i '' 's/flush_largest_memtables_at: 0.75/flush_largest_memtables_at: 0.99/g' $f/conf/cassandra.yaml
  echo $f
  if [ $c -eq ${LOW_MEM_NODES} ]; then
    break
  fi
done

ccm start
echo

echo "CREATE KEYSPACE examples WITH REPLICATION     = { 'class' : 'SimpleStrategy',         'replication_factor' : ${RF} };" | ccm node1 cqlsh
echo "CREATE TABLE examples.songs (   id uuid PRIMARY KEY,   title text,   album text,   artist text,   tags set<text>,   data blob );" | ccm node1 cqlsh
echo "DESCRIBE KEYSPACE examples" | ccm node1 cqlsh