added --single-transaction to mysqldump backup command

please note that this flag is position dependant. You can not put it before --defaults-file

roles/slurm_sql_bk/templates/backup_mysql_for_slurm.sh.j2

@@ -9,7 +9,7 @@ DATA_DIR={{ SQL_BK_DATA_DIR }}
 NAME="$DATA_DIR/mysql_dump_20${TIME}.sql"
 
 cd $DATA_DIR
-sudo mysqldump --defaults-file=$BIN_DIR/mysql.conf --host={{ SQL_IP }}   slurm_acct_db > $NAME
+sudo mysqldump --defaults-file=$BIN_DIR/mysql.conf --single-transaction --host={{ SQL_IP }}   slurm_acct_db > $NAME
 sudo chmod go-r $NAME
 sudo gzip -f $NAME
 #scp file to   dummy user @ Destination Node and Directory