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Configurations for the Exchange Mailbox Agent Index Server

Select a MediaAgent that will function as the index server.

If you configure content indexing, this index server is also used for content indexing operations.

Important:

  • Use a different MediaAgent than the one that is used to create the library and storage policy.
  • You can use only one index server per Exchange Mailbox client. You must create an index server for each Exchange Mailbox client in your CommCell environment.
  • The maximum number of archived messages per index server is 500 million.

Recommendations

For the best performance, consider these recommendations when you prepare your the MediaAgent that will function as the index server.

MediaAgent

Make sure that the MediaAgent that functions as the index server has enough space allocated to it. Use these guidelines to select the appropriate hardware for your MediaAgent.

Index Server Size Without Content Indexing

When archived messages are indexed without content indexing enabled, only the metadata is indexed. Therefore, these guidelines are based on the number of messages that currently reside on your Exchange servers.

For this example, the average size of the messages is 240 KB.

Number of messages Hard drive size (minimum) RAM (minimum)
1 billion (extra large) 1 TB 128 GB
750 million (large) 750 GB 64 GB
500 million (medium) 500 GB 32 GB
250 million (small) 250 GB 16 GB

Index Server Size with Content Indexing

When archived message are content indexed, the entire message is indexed. Therefore, these guidelines are based on the size of your archived data.

Content indexing increases the required hard drive size by approximately 15 percent. For example, for every 10 GB of archived data, you require 1.5 GB of hard drive space when content indexing is enabled.

The following table compares the required hard drive size with and without content indexing enabled. For this example, the average size of the messages is 240 KB.

Data size Hard drive size (minimum) RAM (minimum)
1 TB 150 GB 128 GB
100 GB 15 GB 96 GB
10 GB 1.5 GB 48 GB
1 GB 150 MB 24 GB

Index Cache

  • The index cache on the index server might require a large amount of space, especially if the index is reconstructed.
  • Configure the index cache on a large drive and on a different drive than the one where the operating system is installed.