
Explanation/Reference:
Explanation:
Exchange 2013 includes a script called CollectOverMetrics.ps1, which can be found in the Scripts folder.
CollectOverMetrics.ps1 reads DAG member event logs to gather information about database operations (such as database mounts, moves, and failovers) over a specific time period. For each operation, the script records the following information:
Identity of the database

Time at which the operation began and ended

Servers on which the database was mounted at the start and finish of the operation

Reason for the operation

Whether the operation was successful, and if the operation failed, the error details

The script writes this information to .csv files with one operation per row. It writes a separate .csv file for each DAG.
The script supports parameters that allow you to customize the script's behavior and output. For example, the results can be restricted to a specified subset by using the Database or ReportFilter parameters.
Only the operations that match these filters will be included in the summary HTML report.
References:http://technet.microsoft.com/en-us/library/dd351258(v=exchg.150).aspx