When you install a database server package, it creates a data directory and database directories by default. You do not need to create these directories if you do not have them.
The data and database directories are automatically created in the Db2 installation, so you do not need to add them. However, if you want to add a data or database directory, then go ahead and do so!
This article will talk about how to add an empty data or empty database directory in Db2. You can also do this in Db1 too, but this article does not talk about that.
2) MySQL data directory location
If your instance does not have the MySQL data directory location, you can fix it by following the instructions in this article.
This article will explain in detail, how to create the MySQL data directory in your instance. This article will also give you detailed instructions on how to enable and use the MySQL data directory in your instance.
3) MySQL startup options
There are three ways to start MySQL: by default, via the MySQL host configuration (i.e. localhost/mysql), or without a configuration, through the MyISAM file format and server commands.
Exception in initandlisten: Nonexistent path: Data directory /Data/Db not found., terminating
An exception was thrown while starting the database. Try creating a new database and/or adding a new table to your database at this point.
Exception in initandlisten: Nonexistent path: Data directory /Data/Db not found., terminating
Bullet point: Table creation failed with an error ‘Table name does not exist’. Try creating a new table and/or adding a new column to your table at this point.
What does this error mean?
This error happens when the data directory you specify for your database does not exist. The solution is to create a data directory in your Db2 database.
Similarly, the name of your database must be set as the Data Directory in Db2. That is, if your database name is Shelly, then create a Shelly Data Directory!
There are two possible solutions for this issue. The first is to rename your data directory or use a different mount point for it. The second is to add a statement to your configuration that specifies the path to the database.
Solution 1 – Fix corrupted mysql config file
First and foremost, make sure that the data directory and database configuration file is not corrupted. If it is, thenException ininitandlisten: Nonexistentpath: Data Directory /Data/Db Not Found. will stop mysql from starting properly.
If you are having trouble setting up your database and creating your table, try deleting and reinstating your database and table once to see if that works. If so, make sure that you have set up the data directory and database correctly.
If not, make sure that your enabled features are set up correctly and that there are no missing entries or empty cells in your data folder or data file.
Solution 2 – Change data directory location in my.cnf file
In order to fix this issue, I recommend changing data directory location in my.cnf file. This can be done via the command line or GUI.
Solution 3 – Set different startup options for mysql server
In our case, we want mysql server to connect to the local database using TCP protocol, so we have to choose a different startup option for mysql server.
To do this, open mysql_pre_server_configure in phpmyadmin and modify the configuration. Under global options, add an entry for tcp://127.0.0.1:3306 as the network protocol.
This will cause mysql server to use TCP protocol when it starts up.
