Creates a mysql database in a ramdisk with socket support (/tmp/mysql_ram.socket)

mysql_in_ramdisk.sh

DEVICE=`hdiutil attach -nomount ram://2048000`  # 2GB Ramdisk
diskutil erasevolume HFS+ "ramdisk" $DEVICE     # mounted automaticaly in /Volumes/ramdisk

BASE_DIR=/usr/local/opt/mysql                   # MySQL home installed via Homebrew
DATA_DIR=/Volumes/ramdisk                       # Ramdisk home
SOCKET=/tmp/mysql_ram.sock                      # SOcket for the new mysql server instance
PID_FILE=/tmp/mysql_ram.pid                     # Pid file for the mysql server

# Create mysql db in ramdisk dir
mysql_install_db --basedir="$BASE_DIR" --datadir="$DATA_DIR"

# Start mysql server (only with socket support)
(mysqld --basedir="$BASE_DIR" --datadir="$DATA_DIR" --plugin-dir="$BASE_DIR/lib/plugin" --pid-file="$PID_FILE" --socket=$SOCKET --skip-networking) &

# Wait for the mysql server
while [ ! -e $SOCKET ] ; do
  sleep 1
done

# Setup the new db server
mysql --socket=$SOCKET -uroot -e "GRANT ALL PRIVILEGES ON *.* TO 'fuji'@'localhost' IDENTIFIED BY 'yama' WITH GRANT OPTION;"
mysql --socket=$SOCKET -uroot -e "CREATE DATABASE my_database;"

# Catch ctrl-c
trap ctrl_c INT

# Shutdown server and umount ramdisk
function ctrl_c() {
  kill -TERM $(cat $PID_FILE)
  wait
  umount $DATA_DIR
  hdiutil detach $DEVICE
}

wait