# US 2013/0159648 A1 · Data selection for movement from a source to a target > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2013/0159648 A1 - Document ID: US20130159648A1 - Status: Published application - Kind: A1 - Application number: 13/484,119 - Filed: 2012-05-30 - Published: 2013-06-20 - Earliest claimed: 2011-12-15 - Assignees: International Business Machines Corporation - Inventors: Matthew J. Anglin; David M. Cannon; Colin S. Dawson; Robert S. Elder - Web page: https://patentgrep.com/patent/US20130159648A1 ## CPC - G06F 11/1453: {using de-duplication of the data} - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) ## Abstract In one aspect of the present description, in connection with storing a first deduplicated data object in a primary storage pool, described operations include determining the duration of time that the first data object has resided in the primary storage pool, and comparing the determined duration of time to a predetermined time interval. In addition, described operations include, after the determined duration of time meets or exceeds the predetermined time interval, determining if the first data object has an extent referenced by another data object, and determining whether to move the first data object from the primary storage pool to a secondary storage pool as a function of whether the first data object has an extent referenced by another data object after the determined duration of time meets or exceeds the predetermined time interval. Other features and aspects may be realized, depending upon the particular application. ## Claims ### Claim 1 A method, comprising: storing a first deduplicated data object in a primary storage pool; determining the duration of time that the first data object has resided in the primary storage pool; comparing the determined duration of time to a predetermined time interval; after the determined duration of time meets or exceeds the predetermined time interval, determining if the first data object has an extent referenced by another data object; and determining whether to move the first data object from the primary storage pool to a secondary storage pool as a function of whether the first data object has an extent referenced by another data object after the determined duration of time meets or exceeds the predetermined time interval. ### Claim 2 (depends on 1) The method of claim 1 wherein determining whether to move the first data object includes calculating the space occupied by the data object extents not referenced by another data object after the determined duration of time meets or exceeds the predetermined time interval. ### Claim 3 (depends on 2) The method of claim 2 further comprising moving the first data object from the primary storage pool to a secondary storage pool if the calculated space occupied by the data object extents not referenced by another data object, exceeds a threshold. ### Claim 4 (depends on 1) The method of claim 1, further comprising: storing a second deduplicated data object in a primary storage pool; determining the duration of time that the second data object has resided in the primary storage pool; comparing the determined duration of time for the second data object to a predetermined time interval; after the determined duration of time for the second data object meets or exceeds the predetermined time interval, determining if the second data object has an extent referenced by another data object; and determining whether to move the second data object from the primary storage pool to a secondary storage pool as a function of whether the second data object has an extent referenced by another data object after the determined duration of time meets or exceeds the predetermined time interval. ### Claim 5 (depends on 4) The method of claim 4 wherein the determining whether to move the second data object includes calculating the space occupied by the data object extents of the second data object not referenced by another data object after the determined duration of time meets or exceeds the predetermined time interval. ### Claim 6 (depends on 5) The method of claim 5 further comprising moving the first data object from the primary storage pool to a secondary storage pool if the calculated space occupied by the data object extents of the first data object not referenced by another data object, exceeds the calculated space occupied by the data object extents of the second data object not referenced by another data object. ### Claim 7 (depends on 1) The method of claim 1, further comprising: storing a first volume containing deduplicated data objects in a primary storage pool; for each data object of the first volume: determining the duration of time that the data object of the first volume has resided in the primary storage pool; comparing the duration of time determined for the data object of the first volume to a predetermined time interval; and after the duration of time determined for the data object of the first volume meets or exceeds the predetermined time interval, calculating for each extent of the data object of the first volume not referenced by another data object, the space occupied by the data object extents not referenced by another data object and calculating the available space of the first volume; and determining whether to move the data objects of the first volume from the primary storage pool to a secondary storage pool as a function of the calculated space occupied and the calculated available space. ### Claim 8 (depends on 7) The method of claim 7 wherein the predetermined time interval for each data object of the first volume is determined as a function of at least one of a time interval between backup events at a client station, propagation time of duplicate data between client stations, and backup processing time for a data object stored in the primary storage pool. ### Claim 9 (depends on 7) The method of claim 7, further comprising: storing a second volume containing deduplicated data objects in a primary storage pool; for each data object of the second volume: determining the duration of time that the data object of the second volume has resided in the primary storage pool; comparing the duration of time determined for the data object of the second volume to a predetermined time interval; and after the duration of time determined for the data object of the second volume meets or exceeds the predetermined time interval, calculating for each extent of ii the data object of the second volume not referenced by another data object, the space occupied by the data object extents not referenced by another data object and calculating the available space of the second volume; and determining whether to move the data objects of the second volume from the primary storage pool to a secondary storage pool as a function of the calculated space occupied and the calculated available space. ### Claim 10 (depends on 9) The method of claim 9 wherein the determining whether to move the data objects of the second volume includes calculating the space occupied by the data object extents of the second volume not referenced by another data object after the determined duration of time meets or exceeds the predetermined time interval. ### Claim 11 (depends on 10) The method of claim 10 further comprising moving the data objects of the first volume from the primary storage pool to a secondary storage pool if the calculated space occupied by the data object extents of the first volume not referenced by another data object, exceeds the calculated space occupied by the data object extents of the second volume not referenced by another data object. ### Claim at position 12 12-30. (canceled)