remote_mysqldump_restore.sh

#! /bin/sh

DBNAME="mydatabase"
TABLES="table_x table_y"
FILENAME=/tmp/tmp.sql
SOURCE="[email protected]"
DEST="[email protected] [email protected]"

ssh $SOURCE "sudo mysqldump --single-transaction --hex-blob --order-by-primary --skip-triggers -u user --password=password $DBNAME $TABLES > $FILENAME"
scp $SOURCE:$FILENAME $FILENAME

# Function to check for active table locks
function checkLocks($host)
{
    RESULT=$(ssh $host "mysql -h127.0.0.1 -uuser -ppass -P3304 $DBNAME -e \"SELECT p.user, LEFT(p.HOST, LOCATE(':', p.HOST) - 1) host, p.id, TIMESTAMPDIFF(SECOND, t.TRX_STARTED, NOW()) duration, COUNT(DISTINCT ot.REQUESTING_TRX_ID) waiting, p.Command, p.Info  FROM INFORMATION_SCHEMA.INNODB_TRX t JOIN INFORMATION_SCHEMA.PROCESSLIST p ON ( p.ID = t.TRX_MYSQL_THREAD_ID ) LEFT JOIN INFORMATION_SCHEMA.INNODB_LOCK_WAITS ot ON ( ot.BLOCKING_TRX_ID = t.TRX_id ) WHERE t.TRX_STARTED + INTERVAL 2 SECOND <= NOW() GROUP BY LEFT(p.HOST, LOCATE(':', p.HOST) - 1), p.id, duration HAVING duration >= 2 OR waiting > 0;\"")
}

for host in $DEST; do
    checkLocks($host)
    cat $FILENAME | ssh $host 'mysql -u user --password=password $DBNAME' || exit 1
done

while [ "$RESULT" != "" ]; do
    echo "######### TABLE LOCKS FOUND ########"
    echo $RESULT
    read -p "(C)heck Again/(A)bort?" choice
    case $choice in
        [Cc]* ) checkLocks;;
        [Aa]* ) exit 1;;
        * ) checkLocks;;
    esac
done