Database Settings

Revision as of 20:52, 27 May 2011

 

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If you want to quick know the walkthrough for database setup, see #Quick Setup.

Structure

On OpenSim 0.7.1 or later, you need to set StorageProvider and ConnectionString for each data services (e.g. region database, asset service, inventory service) in the config files in config-include/. Usually you'll need to edit StandaloneCommon.ini for standalone or GridCommon.ini for grid mode.

In those files, you'll find [DatabaseService] section, which parameters control the parameters of data services in general. Only you have to care about are these two lines below:

StorageProvider = "OpenSim.Data.MySQL.dll"
ConnectionString = "Data Source=localhost;Database=opensim;User ID=opensim;Password=***;Old Guids=true;"

In this case, it will connect to the database which can access by the connection string "Data Source=localhost;Database=opensim;User ID=opensim;Password=***;Old Guids=true;" using the provider module named "OpenSim.Data.MySQL.dll".

Or, you can include another ini files. You'll find a line like that:

Include-Storage = "config-include/storage/SQLiteStandalone.ini";

It means it will go on to read config-include/storage/SQLiteStandalone.ini after reading this ini file. If you open SQLiteStandalone.ini file, you'll find StrageProvider and ConnectionString lines in each sections.

NOTE: There had been another way to connect to MSSQL database, which was using "mssql_connection.ini" in bin/ directory. On OpenSim 0.7.1 or later, it will NOT be read even if you set it properly. Use ConnectionString in *Common.ini instead. For more specific details, see the section #MSSQL.

Database Parameters

ConnectionString Syntax

MySQL

Data Source=[1];Database=[2];User ID=[3];Password=[4];Old Guids=true;

• [1] The hostname or ip address of database server
• [2] Database name
• [3] Username for the database above
• [4] Password for the user above

Example: If you have created the database "opensim" in localhost, and then created the user "opensimuser" and its password is "opensimpassword", it will be:

ConnectionString = "Data Source=localhost;Database=opensim;User ID=opensimuser;Password=opensimpassword;Old Guids=true;"

SQLite

URI=file:[1],version=3,UseUTF16Encoding=True;

• [1] The path to the database file (relative to the bin/ directory - If there is no file on this path, it will be created automatically)

Example: If you want to create the database for Inventory Service in the directory "bin/db", it will be:

ConnectionString = "URI=file:db/inventory.db,version=3,UseUTF16Encoding=True"

MSSQL

Server=[1];Database=[2];User Id=[3]; password=[4];

• [1] "servername\instance name" - You can see this string in SQL Server Managerment Studio login dialog(Server:).
• [2] Database name
• [3] Username for the database above
• [4] Password for the user above

Example: If you have installed Microsoft SQL Server Express Edition with default settings on your local machine , created the database "opensim" in localhost, and then created the user "opensimuser" and its password is "opensimpassword", it will be:

ConnectionString = "Server=localhost\SQLEXPRESS;Database=opensim;User Id=opensimuser; password=opensimpassword;"

Using Multiple Storages

Currently there are several services in OpenSim.

• [InventoryService]
• [AssetService]
• [AvatarService]
• [AuthenticationService]
• [UserAccountService]
• [GridUserService]
• [FriendsService]
• [EstateDataStore]
• [SimulationDataStore]
• [PresenceService]
• [AuthorizationService]
• [GridService]

You can use different storage for some service by overriding the same propaties in the section for those service. For example, if you are using OpenSim standalone and want to use MySQL 'opensim' in general but MySQL 'opensim2' for Inventory Service and MSSQL for Authentication Service, you'll need to write in StandaloneCommon.ini like that:

[DatabaseService]
StorageProvider = "OpenSim.Data.MySQL.dll"
ConnectionString = "Data Source=localhost;Database=opensim;User ID=opensim;Password=***;Old Guids=true;"
...
[InventoryService]
ConnectionString = "Data Source=localhost;Database=opensim2;User ID=opensim;Password=***;Old Guids=true;"
...
[AuthenticationService]
...(another parameters for authentication service)...
StorageProvider = "OpenSim.Data.MSSQL.dll"
ConnectionString = "Data Source=(local);Database=opensim;User=opensim;password=********;"

If OpenSim can't find StorageProvider or ConnectionString in each service's section, it will use those in [DatabaseService] section. If OpenSim find each or them, it will use the parameter in each service's section. Thus, then the settings in these sections override those in [DatabaseService] section.

In this case, Inventory Service will:

• read [DatabaseService]StorageProvider
• read [DatabaseService]ConnectionString -> read [InventoryService]ConnectionString and override

Ahthentication Service will:

• read [DatabaseService]StorageProvider -> read [AuthenticationService]StorageProvider and override
• raad [DatabaseService]ConnectionString -> read [AuthenticationService]ConnectionString and override

Note: SQLite and MSSQL providers don't support some services.

Note: For Estate Service, there is another parameter EstateConnectionString in [DatabaseService]. It is the middle priority between [DatabaseService] and [EstateDataStore] ConnectionStrings. OpenSim reads ConnectionString in [DatabaseService] section first, next EstateConnectionString, finally ConnectionString in [EstateDataService] section and overrides.

Quick Setup

SQLite

Out-of-the-box.

MySQL

(TODO)

MSSQL

(TODO)