run mysql on ramdisk for mac os and mysql 5.7

create_ramdisk_mysql.sh

#!/bin/bash

#original script from: http://kotega.com/blog/2010/apr/12/mysql-ramdisk-osx/

diskutil erasevolume HFS+ 'Ramdisk' `hdiutil attach -nomount ram://2097152`

/usr/local/Library/LinkedKegs/mysql/bin/mysqld --initialize-insecure \
  --user=visca \
  --datadir=/Volumes/Ramdisk \
  --basedir=/usr/local/Library/LinkedKegs/mysql \
  --explicit_defaults_for_timestamp=1

/usr/local/Library/LinkedKegs/mysql/bin/mysqld_safe \
  --basedir=/usr/local/Library/LinkedKegs/mysql \
  --datadir=/Volumes/Ramdisk \
  --user=visca \
  --port=3305 \
  --timezone=UTC