<p>The identifier of the event source for which events will be returned. If this parameter is not specified, then all sources are included in the response.</p> <p>Constraints:</p> <p>If <i>SourceIdentifier</i> is supplied, <i>SourceType</i> must also be provided.</p> <ul> <li> <p>Specify a cluster identifier when <i>SourceType</i> is <code>cluster</code>.</p> </li> <li> <p>Specify a cluster security group name when <i>SourceType</i> is <code>cluster-security-group</code>.</p> </li> <li> <p>Specify a cluster parameter group name when <i>SourceType</i> is <code>cluster-parameter-group</code>.</p> </li> <li> <p>Specify a cluster snapshot identifier when <i>SourceType</i> is <code>cluster-snapshot</code>.</p> </li> </ul>

<p>The event source to retrieve events for. If no value is specified, all events are returned.</p> <p>Constraints:</p> <p>If <i>SourceType</i> is supplied, <i>SourceIdentifier</i> must also be provided.</p> <ul> <li> <p>Specify <code>cluster</code> when <i>SourceIdentifier</i> is a cluster identifier.</p> </li> <li> <p>Specify <code>cluster-security-group</code> when <i>SourceIdentifier</i> is a cluster security group name.</p> </li> <li> <p>Specify <code>cluster-parameter-group</code> when <i>SourceIdentifier</i> is a cluster parameter group name.</p> </li> <li> <p>Specify <code>cluster-snapshot</code> when <i>SourceIdentifier</i> is a cluster snapshot identifier.</p> </li> </ul>

<p>The beginning of the time interval to retrieve events for, specified in ISO 8601 format. For more information about ISO 8601, go to the <a href="http://en.wikipedia.org/wiki/ISO_8601">ISO8601 Wikipedia page.</a> </p> <p>Example: <code>2009-07-08T18:00Z</code> </p>

<p>The end of the time interval for which to retrieve events, specified in ISO 8601 format. For more information about ISO 8601, go to the <a href="http://en.wikipedia.org/wiki/ISO_8601">ISO8601 Wikipedia page.</a> </p> <p>Example: <code>2009-07-08T18:00Z</code> </p>

<p>The number of minutes prior to the time of the request for which to retrieve events. For example, if the request is sent at 18:00 and you specify a duration of 60, then only events which have occurred after 17:00 will be returned.</p> <p>Default: <code>60</code> </p>

<p>The maximum number of response records to return in each call. If the number of remaining response records exceeds the specified <code>MaxRecords</code> value, a value is returned in a <code>marker</code> field of the response. You can retrieve the next set of records by retrying the command with the returned marker value. </p> <p>Default: <code>100</code> </p> <p>Constraints: minimum 20, maximum 100.</p>

An optional parameter that specifies the starting point to return a set of response records. When the results of a <a>DescribeEvents</a> request exceed the value specified in <code>MaxRecords</code>, Amazon Web Services returns a value in the <code>Marker</code> field of the response. You can retrieve the next set of response records by providing the returned marker value in the <code>Marker</code> parameter and retrying the request.