# US 2010/0169592 A1 · Generating a recovery snapshot and creating a virtual view of the recovery snapshot > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2010/0169592 A1 - Document ID: US20100169592A1 - Status: Published application - Kind: A1 - Application number: 12/344,364 - Filed: 2008-12-26 - Published: 2010-07-01 - Earliest claimed: 2008-12-26 - Inventors: Rajeev Atluri; Sudhakar Pannnerselvam; Jayesh Shah; Satish Kumar; Srin Kumar - Web page: https://patentgrep.com/patent/US20100169592A1 ## CPC - G06F 11/1471: involving logging of persistent data for recovery - G06F 11/2071: {using a plurality of controllers} - G06F 2201/84: Using snapshots, i.e. a logical point-in-time copy of the data - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) ## Abstract Methods, software suites, and systems of generating a recovery snapshot and creating a virtual view of the recovery snapshot are disclosed. In an embodiment, a method includes generating a recovery snapshot at a predetermined interval to retain an ability to position forward and backward when a delayed roll back algorithm is applied and creating a virtual view of the recovery snapshot using an algorithm tied to an original data, a change log data, and a consistency data related to an event. The method may include redirecting an access request to the original data based on a meta-data information provided in the virtual view. The method may further include substantially retaining a timestamp data, a location of a change, and a time offset of the change as compared with the original data. ## Claims ### Claim 1 A method, comprising: generating a recovery snapshot at a predetermined interval to retain an ability to position forward and backward when a delayed roll back algorithm is applied; and creating a virtual view of the recovery snapshot using an algorithm tied to an original data, a change log data, and a consistency data related to an event. ### Claim 2 (depends on 1) The method of claim 1 further comprising redirecting an access request to the original data based on a meta-data information provided in the virtual view. ### Claim 3 (depends on 2) The method of claim 2 further comprising substantially retaining a timestamp data, a location of a change, and a time offset of the change as compared with the original data. ### Claim 4 (depends on 1) The method of claim 1 further comprising utilizing a relational database to process the change log data in a meta-data format, and to process other on-disk data using a binary-tree format. ### Claim 5 (depends on 1) The method of claim 1, wherein the virtual view is specific to a volume object in a kernel that imitates another volume having the original data. ### Claim 6 (depends on 5) The method of claim 5, wherein the virtual view is managed by a kernel space that processes an access request through at least one table using a meta-data created in a retention log. ### Claim 7 (depends on 1) The method of claim 1 further comprising exporting the virtual view as a virtual volume using at least one of an iSCSI and a fiber channel transport to an external processing device. ### Claim 8 (depends on 1) The method of claim 1, wherein the change log data is applied when the virtual view is unfrozen after a user session reaches a level state. ### Claim 9 (depends on 1) The method of claim 1 further comprising: generating a series of indexes of the virtual view to enable a linking to an event description of the virtual view rather than to an actual data in the original data; and automatically creating the virtual view in at least one of a scheduled and an event driven manner. ### Claim 10 (depends on 1) The method of claim 1 further comprising automatically exporting the virtual view to a physical storage medium. ### Claim 11 (depends on 1) The method of claim 1, wherein a machine is caused to perform the method of claim 1 when a machine-readable medium embodying a set of instructions is executed by the machine using a processor and a physical memory. ### Claim 12 A software suite, comprising: a portion to generate a recovery snapshot at a predetermined interval to retain an ability to position forward and backward when a delayed roll back algorithm is applied; and a portion to create a virtual view of the recovery snapshot using a processor and a physical memory to execute an algorithm tied to an original data, a change log data, and a consistency data related to an event. ### Claim 13 (depends on 12) The software suite of claim 12 further comprising a portion to redirect an access request to the original data based on a meta-data information provided in the virtual view. ### Claim 14 (depends on 13) The software suite of claim 13 further comprising a portion to substantially retain a timestamp data, a location of a change, and a time offset of the change as compared with the original data. ### Claim 15 (depends on 12) The software suite of claim 12 further comprising a portion to utilize a relational database to process the change log data in a meta-data format, and to process other on-disk data using a binary-tree format. ### Claim 16 (depends on 12) The software suite of claim 12, wherein the virtual view is specific to a volume object in a kernel that imitates another volume having the original data. ### Claim 17 (depends on 16) The software suite of claim 16, wherein the virtual view is managed by a kernel space that processes an access request through at least one table using a meta-data created in a retention log. ### Claim 18 A system, comprising: a recovery module to generate a recovery snapshot at a predetermined interval to retain an ability to position forward and backward when a delayed roll back algorithm is applied; and a virtualization module to create a virtual view of the recovery snapshot using an algorithm tied to an original data, a change log data, and a consistency data related to an event. ### Claim 19 (depends on 18) The method of claim 18, wherein the virtualization module redirects an access request to the original data based on a meta-data information provided in the virtual view. ### Claim 20 (depends on 19) The method of claim 19, wherein the virtualization module substantially retains a timestamp data, a location of a change, and a time offset of the change as compared with the original data.