IP Library › Granted Patent US 9,916,101
Granted Patent B2
US 9,916,101 · App. 14/740,406 · Granted Mar 13, 2018

Systems and methods for replication of data utilizing delta volumes

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Quick Facts
Patent No.
US 9,916,101
App. No.
14/740,406
Granted
Mar 13, 2018
Kind
B2
Abstract

A method of data replication from a first data storage device to a second data storage device. The method may include generating, at the first data storage device, at spaced time intervals, a plurality of snapshots for a logical data volume of the first data storage device, the logical data volume being an abstraction of data blocks from one or more physical storage devices, each snapshot identifying changes of data for at least a portion of the logical data volume since a most previous snapshot. Also at the first data storage device, the method includes generating a delta volume, the delta volume indicating changes in the data of at least a portion of the logical data volume between two non-consecutive snapshots. The method further involves replicating the delta volume to the second data storage device, and replicating the changes to the data indicated therein at the second data storage device.

Claims (33)

1. A method of consolidating data changes in a data storage device in preparation for data replication, the method comprising:

generating, at spaced time intervals, a plurality of snapshots for a logical data volume of the data storage device, the logical data volume being an abstraction of data blocks from one or more physical storage devices, each snapshot identifying changes of data for at least a portion of the logical data volume since a most previous snapshot;

generating a plurality of delta volumes, each delta volume indicating changes in the data of at least a portion of the logical data volume between two non-consecutive snapshots;

transmitting one of the plurality of delta volumes to a second data storage device; and

generating a combined delta volume, the combined delta volume indicating changes in data of at least a portion of the logical data volume between two non-consecutive delta volumes.

2. The method of claim 1 , wherein the spaced time intervals are predetermined time intervals.

3. The method of claim 1 , wherein the second data storage device is remotely located from the data storage device.

4. The method of claim 1 , wherein the data storage device and second data storage device are part of the same data storage subsystem.

5. The data storage system of claim 1 , wherein the combined delta volume is generated at a third data storage device.

6. A method of consolidating data changes in a data storage device in preparation for data replication, the method comprising:

generating, at spaced time intervals, a plurality of snapshots for a logical data volume of the data storage device, the logical data volume being an abstraction of data blocks from one or more physical storage devices, each snapshot identifying changes of data for at least a portion of the logical data volume since a most previous snapshot;

generating a plurality of delta volumes at spaced time intervals, each delta volume indicating changes in the data of at least a portion of the logical data volume between two non-consecutive snapshots; and

generating a combined delta volume, the combined delta volume indicating changes in data of at least a portion of the logical data volume between two non-consecutive delta volumes.

7. The method of claim 6 , further comprising generating a plurality of combined delta volumes at spaced time intervals.

8. The method of claim 6 , further comprising transmitting the combined delta volume to a second data storage device.

9. The method of claim 6 , further comprising transmitting one of the plurality of delta volumes to a second data storage device.

10. A method of data replication from a first data storage device to a second data storage device, the method comprising:

receiving a plurality of delta volumes at the second data storage device, each delta volume indicating changes in data of at least a portion of a logical data volume of the first data storage device;

wherein the first data storage device generates a plurality of snapshots for the logical data volume, the logical data volume being an abstraction of data blocks from one or more physical storage devices, each snapshot identifying changes of data for at least a portion of the logical data volume since a most previous snapshot;

wherein each delta volume indicates changes in data of at least a portion of the logical data volume between two non-consecutive snapshots; and

generating a combined delta volume, the combined delta volume indicating changes in data of at least a portion of the logical data volume between two non-consecutive delta volumes.

11. The method of claim 10 , wherein the snapshots are generated at predetermined time intervals.

12. The method of claim 10 , wherein each delta volume is generated at the first data storage device and is discarded at the first data storage device after being sent to the second data storage device.

13. The method of claim 10 , further comprising generating a plurality of combined delta volumes at spaced time intervals.

14. The method of claim 10 , further comprising replicating the combined delta volume to a third data storage device.

15. The method of claim 10 , wherein the second data storage device is remotely located from the first data storage device.

16. The method of claim 10 , wherein the first and second data storage devices are part of the same data storage subsystem.

17. The method of claim 10 , wherein the combined delta volume is generated at a third data storage device.

18. A data storage system comprising:

a data storage device generating, at spaced time intervals, a plurality of snapshots for a logical data volume of the first data storage device, the logical data volume being an abstraction of data blocks from one or more physical storage devices, each snapshot identifying changes of data for at least a portion of the logical data volume since a most previous snapshot; and

a plurality of delta volumes, each delta volume comprising an indication of changes in data between two non-consecutive snapshots of the data storage system, each snapshot identifying changes of data for at least a portion of the data storage system since a most previous snapshot;

a second data storage device, wherein the plurality of delta volumes are transmitted to the second data storage device; and

a combined delta volume indicating changes in data of at least a portion of the logical data volume between two non-consecutive delta volumes.

Assignments (16)
RELEASE OF SECURITY INTEREST IN PATENTS PREVIOUSLY RECORDED AT REEL/FRAME (053546/0001) Recorded Jun 23, 2022
From: THE BANK OF NEW YORK MELLON TRUST COMPANY, N.A., AS NOTES COLLATERAL AGENT
To: DELL MARKETING L.P. (ON BEHALF OF ITSELF AND AS SUCCESSOR-IN-INTEREST TO CREDANT TECHNOLOGIES, INC.); DELL INTERNATIONAL L.L.C.; DELL PRODUCTS L.P.; DELL USA L.P.; EMC CORPORATION; DELL MARKETING CORPORATION (SUCCESSOR-IN-INTEREST TO FORCE10 NETWORKS, INC. AND WYSE TECHNOLOGY L.L.C.); EMC IP HOLDING COMPANY LLC
Reel/Frame 071642/0001 →
RELEASE OF SECURITY INTEREST IN PATENTS PREVIOUSLY RECORDED AT REEL/FRAME (045455/0001) Recorded May 20, 2022
From: THE BANK OF NEW YORK MELLON TRUST COMPANY, N.A., AS NOTES COLLATERAL AGENT
To: DELL MARKETING CORPORATION (SUCCESSOR-IN-INTEREST TO ASAP SOFTWARE EXPRESS, INC.); DELL MARKETING L.P. (ON BEHALF OF ITSELF AND AS SUCCESSOR-IN-INTEREST TO CREDANT TECHNOLOGIES, INC.); DELL USA L.P.; DELL INTERNATIONAL L.L.C.; DELL PRODUCTS L.P.; DELL MARKETING CORPORATION (SUCCESSOR-IN-INTEREST TO FORCE10 NETWORKS, INC. AND WYSE TECHNOLOGY L.L.C.); EMC CORPORATION (ON BEHALF OF ITSELF AND AS SUCCESSOR-IN-INTEREST TO MAGINATICS LLC); EMC IP HOLDING COMPANY LLC (ON BEHALF OF ITSELF AND AS SUCCESSOR-IN-INTEREST TO MOZY, INC.); SCALEIO LLC
Reel/Frame 061753/0001 →
RELEASE OF SECURITY INTEREST IN PATENTS PREVIOUSLY RECORDED AT REEL/FRAME (040136/0001) Recorded Apr 26, 2022
From: THE BANK OF NEW YORK MELLON TRUST COMPANY, N.A., AS NOTES COLLATERAL AGENT
To: DELL MARKETING CORPORATION (SUCCESSOR-IN-INTEREST TO ASAP SOFTWARE EXPRESS, INC.); DELL MARKETING L.P. (ON BEHALF OF ITSELF AND AS SUCCESSOR-IN-INTEREST TO CREDANT TECHNOLOGIES, INC.); DELL USA L.P.; DELL INTERNATIONAL L.L.C.; DELL PRODUCTS L.P.; DELL MARKETING CORPORATION (SUCCESSOR-IN-INTEREST TO FORCE10 NETWORKS, INC. AND WYSE TECHNOLOGY L.L.C.); EMC CORPORATION (ON BEHALF OF ITSELF AND AS SUCCESSOR-IN-INTEREST TO MAGINATICS LLC); EMC IP HOLDING COMPANY LLC (ON BEHALF OF ITSELF AND AS SUCCESSOR-IN-INTEREST TO MOZY, INC.); SCALEIO LLC
Reel/Frame 061324/0001 →
RELEASE OF SECURITY INTEREST Recorded Nov 3, 2021
From: CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH
To: ASAP SOFTWARE EXPRESS, INC.; AVENTAIL LLC; CREDANT TECHNOLOGIES, INC.; DELL USA L.P.; DELL INTERNATIONAL, L.L.C.; DELL MARKETING L.P.; DELL PRODUCTS L.P.; DELL SOFTWARE INC.; DELL SYSTEMS CORPORATION; EMC CORPORATION; EMC IP HOLDING COMPANY LLC; FORCE10 NETWORKS, INC.; MAGINATICS LLC; MOZY, INC.; SCALEIO LLC; WYSE TECHNOLOGY L.L.C.
Reel/Frame 058216/0001 →
SECURITY AGREEMENT Recorded Apr 22, 2020
From: CREDANT TECHNOLOGIES INC.; DELL INTERNATIONAL L.L.C.; DELL MARKETING L.P.; DELL PRODUCTS L.P.; DELL USA L.P.; EMC CORPORATION; FORCE10 NETWORKS, INC.; WYSE TECHNOLOGY L.L.C.; EMC IP HOLDING COMPANY LLC
To: THE BANK OF NEW YORK MELLON TRUST COMPANY, N.A.
Reel/Frame 053546/0001 →
SECURITY AGREEMENT Recorded Mar 21, 2019
From: CREDANT TECHNOLOGIES, INC.; DELL INTERNATIONAL L.L.C.; DELL MARKETING L.P.; DELL PRODUCTS L.P.; DELL USA L.P.; EMC CORPORATION; FORCE10 NETWORKS, INC.; WYSE TECHNOLOGY L.L.C.; EMC IP HOLDING COMPANY LLC
To: THE BANK OF NEW YORK MELLON TRUST COMPANY, N.A.
Reel/Frame 049452/0223 →
SECURITY AGREEMENT Recorded Sep 21, 2016
From: ASAP SOFTWARE EXPRESS, INC.; AVENTAIL LLC; CREDANT TECHNOLOGIES, INC.; DELL USA L.P.; DELL INTERNATIONAL L.L.C.; DELL MARKETING L.P.; DELL PRODUCTS L.P.; DELL SOFTWARE INC.; DELL SYSTEMS CORPORATION; EMC CORPORATION; EMC IP HOLDING COMPANY LLC; FORCE10 NETWORKS, INC.; MAGINATICS LLC; MOZY, INC.; SCALEIO LLC; SPANNING CLOUD APPS LLC; WYSE TECHNOLOGY L.L.C.
To: CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, AS COLLATERAL AGENT
Reel/Frame 040134/0001 →
SECURITY AGREEMENT Recorded Sep 21, 2016
From: ASAP SOFTWARE EXPRESS, INC.; AVENTAIL LLC; CREDANT TECHNOLOGIES, INC.; DELL USA L.P.; DELL INTERNATIONAL L.L.C.; DELL MARKETING L.P.; DELL PRODUCTS L.P.; DELL SOFTWARE INC.; DELL SYSTEMS CORPORATION; EMC CORPORATION; EMC IP HOLDING COMPANY LLC; FORCE10 NETWORKS, INC.; MAGINATICS LLC; MOZY, INC.; SCALEIO LLC; SPANNING CLOUD APPS LLC; WYSE TECHNOLOGY L.L.C.
To: THE BANK OF NEW YORK MELLON TRUST COMPANY, N.A., AS NOTES COLLATERAL AGENT
Reel/Frame 040136/0001 →
RELEASE OF REEL 036502 FRAME 0291 (NOTE) Recorded Sep 14, 2016
From: BANK OF NEW YORK MELLON TRUST COMPANY, N.A., AS COLLATERAL AGENT
To: DELL SOFTWARE INC.; DELL PRODUCTS L.P.; WYSE TECHNOLOGY L.L.C.
Reel/Frame 040027/0637 →
RELEASE OF REEL 036502 FRAME 0237 (TL) Recorded Sep 14, 2016
From: BANK OF AMERICA, N.A., AS COLLATERAL AGENT
To: DELL SOFTWARE INC.; DELL PRODUCTS L.P.; WYSE TECHNOLOGY L.L.C.
Reel/Frame 040028/0088 →
RELEASE OF REEL 036502 FRAME 0206 (ABL) Recorded Sep 13, 2016
From: BANK OF AMERICA, N.A., AS ADMINISTRATIVE AGENT
To: DELL SOFTWARE INC.; DELL PRODUCTS L.P.; WYSE TECHNOLOGY L.L.C.
Reel/Frame 040017/0204 →
MERGER Recorded Mar 10, 2016
From: COMPELLENT TECHNOLOGIES, INC.
To: DELL INTERNATIONAL L.L.C.
Reel/Frame 038058/0502 →
SUPPLEMENT TO PATENT SECURITY AGREEMENT (ABL) Recorded Aug 27, 2015
From: DELL PRODUCTS L.P.; DELL SOFTWARE INC.; WYSE TECHNOLOGY, L.L.C.
To: BANK OF AMERICA, N.A., AS ADMINISTRATIVE AGENT
Reel/Frame 036502/0206 →
SUPPLEMENT TO PATENT SECURITY AGREEMENT (TERM LOAN) Recorded Aug 27, 2015
From: DELL PRODUCTS L.P.; DELL SOFTWARE INC.; WYSE TECHNOLOGY L.L.C.
To: BANK OF AMERICA, N.A., AS COLLATERAL AGENT
Reel/Frame 036502/0237 →
SUPPLEMENT TO PATENT SECURITY AGREEMENT (NOTES) Recorded Aug 27, 2015
From: DELL PRODUCTS L.P.; DELL SOFTWARE INC.; WYSE TECHNOLOGY L.L.C.
To: THE BANK OF NEW YORK MELLON TRUST COMPANY, N.A., AS NOTES COLLATERAL AGENT
Reel/Frame 036502/0291 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jun 16, 2015
From: PITTELKO, MICHAEL H.; OLSON, MARK DAVID
To: COMPELLENT TECHNOLOGIES
Reel/Frame 035843/0680 →