Rackspace Monitoring tracks various time-indexed data sets, such as audits and alarm histories. When accessing a time series collection, two parameters beyond the base paginated collection API are available: from and to. These parameters take integer values, which are interpreted as timestamps expressed in milliseconds since 00:00:00 UTC on January 1, 1970. If the to value is not specified it defaults to the current time. Each time series collection specifies a default offset from the current time, which is used when the from value is not supplied. For example, if no to or from values are specified when retrieving an alarm history, then it will be treated as a query for the last 7 days of data.
The standard paginated collection API is available on top of the time series collection API. For example, performing a GET on https://monitoring.api.rackspacecloud.com/v1.0/audits?from=1320044400000&to=1320652800000 should retrieve audits from the first 7 days of November, 2011. However, since no limit is supplied a default of 100 is used. Thus, if more than 100 audits exist during that time period only the first 100 will be returned. Further audits within the same period can be retrieved using the next_href URL, or by constructing a URL by using the next_marker value to append a marker to your previous query. For example, to retrieve the next 100 objects beyond the previous query, you might use https://monitoring.api.rackspacecloud.com/v1.0/audits?from=1320044400000&to=1320652800000&marker=16c3de00-038e-11e1-b056-d3a1a3710f94.
You can use the reverse parameter to retrieve the objects in reversed order. By default, objects are returned oldest first.
To convert a particular time to UTC, you can use the date +%s000 command or a website such as http://www.epochconverter.com/.