Important

New database features are no longer connected to engine versions; features are now enabled independently during scheduled update windows, and “major” and “minor” releases no longer exist in Helios. Please visit the release notes to view the latest features available in your database clusters.

Bash

Dependencies

singlestore client
Bourne-Again Shell (bash)

Code

Shell

#!/bin/bash

MHOST="127.0.0.1"
MPORT="3306"
MUSER="root"
MDB=""
NUM_WORKERS=128
BATCH_SIZE=256

memsql_exec()
{
       singlestore -h $MHOST -P $MPORT -u $MUSER $MDB -e "$1"
}

memsql_exec_multi()
{
       singlestore -h $MHOST -P $MPORT -u $MUSER $MDB -e \
                "$(for ((b = 0; b < $BATCH_SIZE; b++)); do
                        echo "$1;"
                done)"
}

echo "Creating database test"
memsql_exec "CREATE DATABASE IF NOT EXISTS test"
MDB="test"

echo "Creating table tbl"
memsql_exec "CREATE TABLE IF NOT EXISTS tbl (id INT AUTO_INCREMENT PRIMARY KEY)"

echo "Launching $NUM_WORKERS workers"
sleep 1
declare -a WORKERS
for ((worker = 0; worker < $NUM_WORKERS; worker++)); do
        (while [ 1 ]; do
                echo "Worker $worker inserting"
                memsql_exec_multi "INSERT INTO tbl VALUES (NULL)"
        done) &
        WORKERS[$worker]=$!
done

sleep 10

for ((worker = 0; worker < $NUM_WORKERS; worker++)); do
        echo "Killing worker $worker"
        kill ${WORKERS[$worker]}
        wait ${WORKERS[$worker]} 2>/dev/null
done
echo "Cleaning up"
sleep 1
memsql_exec "DROP DATABASE test"

Bash

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