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How to Configure the Transport Dumpster Settings

 

Applies to: Exchange Server 2007 SP3, Exchange Server 2007 SP2, Exchange Server 2007 SP1

Topic Last Modified: 2007-07-30

This topic explains how to use the Exchange Management Console or the Exchange Management Shell to configure the transport dumpster feature on a Hub Transport server in Service Pack 1 for Microsoft Exchange Server 2007. The transport dumpster is an optional feature for cluster continuous replication (CCR), and it is enabled by default.

noteNote:
In Exchange 2007 Service Pack 1, the transport dumpster feature supports local continuous replication (LCR) as well.

You can use the Set-TransportConfig cmdlet to change the default configuration settings for the transport dumpster, which are applied at the storage group level.

In the following procedures, you can change the default configuration settings for the transport dumpster. Here are recommendations for configuring two parameters:

  • MaxDumpsterSizePerStorageGroup   We recommend that you configure the maximum size per storage group (the MaxDumpsterSizePerStorageGroup parameter) to a size that is 1.5 times the size of the maximum message that can be sent. For example, if the maximum size for messages is 10 megabytes (MB), you should configure the MaxDumpsterSizePerStorageGroup parameter with a value of 15 MB. For organizations without maximum message sizes, we recommend that you configure the maximum size per storage group with a value of 1.5 times the size of the average message size sent in the organization.

  • MaxDumpsterTime   We also recommend configuring the maximum retention time per storage group (the MaxDumpsterTime parameter) to a value of 07.00:00:00, which is 7 days. This amount of time is sufficient to allow for an extended outage to occur without loss of e-mail. When using the transport dumpster feature, additional disk space is needed on the Hub Transport server to host the transport dumpster queues. The amount of storage space required is approximately equal to the value of MaxDumpsterSizePerStorageGroup multiplied by the number of storage groups.

If you do not configure the transport dumpster, the default values are used. The default value for the MaxDumpsterSizePerStorageGroup parameter is 18 MB, and the default value for the MaxDumpsterTime parameter is 7 days. If either the size limit or time limit is reached, messages are removed from the transport dumpster queue by order of first in, first out.

noteNote:
Setting either value to zero disables the transport dumpster for all storage groups in the Exchange organization.

Verify the following before performing the procedure:

  • Make sure that you have enough space on all Exchange Hub Transport servers in the Active Directory directory service site containing the Mailbox servers using continuous replication to accommodate the data on the transport dumpster queue per storage group.

  • Make sure that the account you use is delegated the Exchange Organization Administrator role. For more information about permissions, delegating roles, and the rights that are required to administer Exchange 2007, see Permission Considerations.

  1. Open the Exchange Management Console.

  2. Expand Organization Configuration, and then select Hub Transport.

  3. In the result pane, select the Global Settings tab.

  4. Double-click Transport Settings.

  5. On the General tab, the current settings are displayed. Set the values as follows:

    1. Type a value in the Maximum size per storage group (MB) field that is equal to 1.5 times the size of the maximum message that can be sent in the organization. For organizations without maximum message sizes, we recommend that you enter a value of 1.5 times the size of the average message size sent in the organization.

    2. Type a value in the Maximum retention time (days) field that is equal to the number of days that messages should be retained. We recommend using 7 days.

  6. Click OK to save the changes.

  1. Open the Exchange Management Shell.

  2. Run the following command to view the current settings for the transport dumpster:

    Get-TransportConfig
    
    noteNote:
    You should see a listing of the transport dumpster settings for the entire Exchange organization.

  1. Open the Exchange Management Shell.

  2. Run the following command.

    Set-TransportConfig -MaxDumpsterSizePerStorageGroup <size> -MaxDumpsterTime <timespan>
    

    For example, to configure the maximum size of the dumpster per storage group to 30 MB with a dumpster life of 7 days, run the following command.

    Set-TransportConfig -MaxDumpsterSizePerStorageGroup 30MB -MaxDumpsterTime 07.00:00:00
    
 
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