Parallel writes to database

[Mohamad Bairakdar]

I'm having trouble running multiple processes that write to a database at once (same table but different records). I'm able to run one process and have my program write to the database, but when I try to run more processes, I can't connect to the database. In particular, I get:

```
OSError: [Errno 113] No route to host
```

I'm guessing this has to do with database locks, but I'm not experienced enough with this to know for sure.

Here is how I start the mysql server:
```
mysqld_safe --socket=mysql.sock --log-error=mysql.log --datadir=mysql_data --pid-file=mariadb.pid --transaction-isolation=READ-COMMITTED &
```

I initially didn't have `--transaction-isolation=READ-COMMITTED`, but I added it because I thought it might help, but it didn't.

I was wondering if I can get some guidance on how to make this work.