Migration of executing applications and associated stored data

• US 9,389,789 B2
• Filed: 12/15/2014
• Issued: 07/12/2016
• Est. Priority Date: 12/15/2014
• Status: Expired due to Fees

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: McBrearty, Gerald F.
• Primary Examiner(s): YU, JAE UN
• Application Number:
  US14/570,208
• Publication Number:
  US 20160170667A1
• Time in Patent Office: 575 Days
• Field of Search: 711/162
• US Class Current: 1/1
• CPC Class Codes: G06F 11/1456 Hardware arrangements for backup
• CPC Class Codes: G06F 11/2074 Asynchronous techniques
• CPC Class Codes: G06F 2009/4557 Distribution of virtual machine instances; Migration and load balancing
• CPC Class Codes: G06F 2009/45579 I/O management, e.g. providing access to device drivers or storage
• CPC Class Codes: G06F 2009/45583 Memory management, e.g. access or allocation
• CPC Class Codes: G06F 2009/45595 Network integration; Enabling network access in virtual machine instances
• CPC Class Codes: G06F 3/0619 in relation to data integrity, e.g. data losses, bit errors
• CPC Class Codes: G06F 9/45558 Hypervisor-specific management and integration aspects
• CPC Class Codes: G06F 9/4856 resumption being on a different machine, e.g. task migration, virtual machine migration G06F9/5088 takes precedence
• CPC Class Codes: G06F 9/5077 Logical partitioning of resources; Management or configuration of virtualized resources specific details on emulation or internal functioning of virtual machines G06F9/455
• CPC Class Codes: H04L 67/1095 Replication or mirroring of data, e.g. scheduling or transport for data synchronisation between network nodes
• CPC Class Codes: H04L 67/1097 for distributed storage of data in networks, e.g. transport arrangements for network file system [NFS], storage area networks [SAN] or network attached storage [NAS]

Abstract

As disclosed herein, a method, executed by a computer, for migrating executing applications and associated stored data includes executing one or more applications in a source system environment that access data stored on a source storage device that is directly accessible within the source system environment, migrating the data to a target storage device that is directly accessible within a target system environment but is not directly accessible within the source system environment, wherein migrating the data comprises copying the data from the source storage device to the target storage device using a remote storage access protocol. A computer system and computer program product corresponding to the method are also disclosed herein.

Claims

1. A method, executed by a computer, for migrating executing applications and associated stored data, the method comprising:

executing applications in a source system environment that access data stored on a source storage device that is directly accessible within the source system environment;

migrating the data to a target storage device that is directly accessible within a target system environment but is not directly accessible within the source system environment, wherein migrating the data comprises copying the data from the source storage device to the target storage device using a remote storage access protocol;

migrating the executing applications from the source system environment to the target system environment; and

wherein migrating the data comprises retrieving a current block from the source storage device via a remote storage access protocol, writing the current block to the target storage device with a local storage access protocol, and advancing the current block to a next block.

2. The method of claim 1, wherein migrating the executing applications is conducted without terminating the executing applications.

3. The method of claim 1, wherein migrating the executing applications is conducted concurrently with migrating the data.

4. The method of claim 1, wherein migrating the executing applications is conducted before or after migrating the data.

5. The method of claim 1, wherein migrating the data is conducted by a process executing in the target system environment.

6. The method of claim 1, wherein migrating the data comprises fulfilling all read and write operations that are behind the current block with the target storage device.

7. The method of claim 1, wherein migrating the data further comprises fulfilling all read and write operations that are beyond the current block with the source storage device.

8. The method of claim 1, wherein migrating the data comprises executing a data transfer process comprising retrieving a current block from the source storage device via a local storage access protocol, writing the current block to the target storage device with a remote storage access protocol, and advancing the current block to a next block.

9. The method of claim 8, wherein the data transfer process is conducted from both ends of a storage media for the source storage device.

10. The method of claim 8, wherein migrating the data comprises fulfilling all write operations on the source storage device.

11. The method of claim 10, wherein all write operations that are behind the current block are fulfilled on the source storage device and the target storage device.

12. The method of claim 8, wherein migrating the data comprises fulfilling all read operations on the source storage device.

13. The method of claim 1, wherein the remote storage access protocol is at least one of RDMA, iSCSI, and iSER.

14. The method of claim 1, further comprising accessing the data on the target storage device with the executing applications.

15. The method of claim 1, wherein the executing applications utilize a logical partition or virtual machine within the source system environment or the target system environment.