---
title:  Setting Properties
---

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<%=vars.product_name%> provides a default distributed system configuration for out-of-the-box systems. To use non-default configurations and to fine-tune your member communication, you can use a mix of various options to customize your distributed system configuration.

<a id="setting_distributed_properties__section_67EBCC53EB174B108DA7271E2CD2B76C"></a>
<%=vars.product_name%> properties are used to join a distributed system and configure system member behavior. Configure your <%=vars.product_name%> properties through the `gemfire.properties` file, the Java API, or command-line input. Generally, you store all your properties in the `gemfire.properties` file, but you may need to provide properties through other means, for example, to pass in security properties for a username and password that you have received from keyboard input.

**Note:**
Check with your <%=vars.product_name%> system administrator before changing properties through the API, including the `gemfire.properties` and `gfsecurity.properties` settings. The system administrator may need to set properties at the command line or in configuration files. Any change made through the API overrides those other settings.

**Note:**
The product `defaultConfigs` directory has a sample `gemfire.properties` file with all default settings.

Set distributed system properties by any combination of the following. The system looks for the settings in the order listed:

1.  `java.lang.System` property setting. Usually set at the command line. For applications, set these in your code or at the command line.

    Naming: Specify these properties in the format `gemfire.property-name`, where `property-name` matches the name in the `gemfire.properties` file. To set the gemfire property file name, use `gemfirePropertyFile` by itself
    -   In the API, set the `System` properties before the cache creation call. Example:

        ``` pre
        System.setProperty("gemfirePropertyFile", "gfTest");
        System.setProperty("gemfire.mcast-port", "10999");

        Cache cache = new CacheFactory().create();
        ```
    -   At the `java` command line, pass in `System` properties using the `-D` switch. Example:

        ``` pre
        java -DgemfirePropertyFile=gfTest -Dgemfire.mcast-port=10999 test.Program
        ```
2.  Entry in a `Properties` object.

    Naming: Specify these properties using the names in the `gemfire.properties` file. To set the gemfire property file name, use `gemfirePropertyFile`.
    -   In the API, create a `Properties` object and pass it to the cache create method. Example:

        ``` pre
        Properties properties= new Properties();
        properties.setProperty("log-level", "warning");
        properties.setProperty("name", "testMember2");
        ClientCache userCache = 
            new ClientCacheFactory(properties).create();
        ```
    -   For the cache server, pass the properties files on the `gfsh` command line as command-line options. Example:

        ``` pre
        gfsh>start server --name=server_name --mcast-port=10338 --properties-file=serverConfig/gemfire.properties --security-properties-file=gfsecurity.properties
        ```

        See [Running <%=vars.product_name%> Server Processes](../../configuring/running/running_the_cacheserver.html) for more information on running cache servers.

3.  Entry in a `gemfire.properties` file. See [Deploying Configuration Files without the Cluster Configuration Service](../../configuring/running/deploying_config_files.html). Example:

    ``` pre
    cache-xml-file=cache.xml
    conserve-sockets=true
    disable-tcp=false
    ```

4.  Default value. The default values are defined within the API for 
`org.apache.geode.distributed.ConfigurationProperties`.


