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Quorum log too small

[This topic is intended to address a specific issue called out by the Exchange Server Analyzer Tool. You should apply it only to systems that have had the Exchange Server Analyzer Tool run against them and are experiencing that specific issue. The Exchange Server Analyzer Tool, available as a free download, remotely collects configuration data from each server in the topology and automatically analyzes the data. The resulting report details important configuration issues, potential problems, and nondefault product settings. By following these recommendations, you can achieve better performance, scalability, reliability, and uptime. For more information about the tool or to download the latest versions, see "Microsoft Exchange Analyzers" at http://go.microsoft.com/fwlink/?linkid=34707.]  

Topic Last Modified: 2005-11-18

The Microsoft® Exchange Server Analyzer Tool reads the following registry entry to determine the size of the quorum log configured for the cluster:

HKEY_LOCAL_MACHINE\Cluster\Quorum\MaxQuorumLogSize

If the Exchange Server Analyzer finds the value for MaxQuorumLogSize less than 4194304 decimal (0x400000 hexadecimal), a warning is displayed.

The MaxQuorumLogSize registry value represents the currently configured value for the Reset quorum log at cluster quorum parameter. This warning is generated if the MaxQuorumLogSize is less than 4096 kilobytes (KB).

The cluster records all changes to the cluster database in the quorum log file. When the quorum log attains the specified size, the cluster saves the database and resets the log file. On Microsoft Windows® 2000 Server-based clusters, the default quorum size limit is 64 KB. On Windows Server™ 2003-based clusters, the default quorum size limit is 4096 KB. For Exchange Server clusters, it is recommended that the Reset quorum log at property be configured to 4096 KB. This ensures that there will be sufficient space to hold the cluster configuration information, such as which servers are part of the cluster, what resources are installed in the cluster, and what state those resources are in (for example, online or offline).

  1. Open Cluster Administrator.

  2. In the left pane, right-click the object that represents the cluster, and then click Properties.

  3. On the Quorum tab, configure Reset quorum log at with a value of 4096.

  4. Click OK to save the changes.

For more information about the default quorum log size limit, see the Microsoft Knowledge Base article 225081, "Cluster Resources Quorum Log Size Defaults to 64 KB" (http://go.microsoft.com/fwlink/?linkid=3052&kbid=225081).

 
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