System and method for data migration from a CAS storage system to a non-CAS storage system

Patent metadata

Field	Value
Publication number	US-11151049-B2
Application number	US-201916662772-A
Country	US
Kind code	B2
Filing date	Oct 24, 2019
Priority date	Oct 24, 2019
Publication date	Oct 19, 2021
Grant date	Oct 19, 2021

Abstract

A method, computer program product, and computer system for invalidating, by a target, all data in a first volume. A source may scan a hash to address table for a second volume to be migrated to the first volume. Data in the second volume may be migrated to be stored in the first volume by pushing information from the hash to address table to the target.

First claim

What is claimed is:

1. A computer-implemented method comprising:
invalidating, by a target, all data in a first volume;
scanning, by a source, a hash to address table for a second volume to be migrated to the first volume; and
migrating data in the second volume to be stored in the first volume by pushing information from the hash to address table to the target, wherein migrating the data in the second volume to be stored in the first volume by pushing the information from the hash to address table to the target includes matching a page in an address to hash table to the hash to address table.

2. The computer-implemented method of claim 1 wherein the information from each entry of the hash to address table includes a hash signature, a data page, and a list of addresses associated with the data page.

3. The computer-implemented method of claim 1 wherein migrating the data in the second volume to be stored in the first volume by pushing the information from the hash to address table to the target includes using a write command for each page in the hash to address table.

4. The computer-implemented method of claim 1 wherein migrating the data in the second volume to be stored in the first volume by pushing the information from the hash to address table to the target includes using a write command for each page in the hash to address table, wherein the write command includes a payload of the data page and a list of addresses where the data page is to be written.

5. The computer-implemented method of claim 1 wherein migrating the data in the second volume to be stored in the first volume by pushing the information from the hash to address table to the target includes dynamically building the hash to address table using a prefix, wherein the hash to address table only includes hash signatures that start with the prefix.

6. The computer-implemented method of claim 1 further comprising sending only content from an address to hash table to the target from the source.

7. A computer program product residing on a non-transitory computer readable storage medium having a plurality of instructions stored thereon which, when executed across one or more processors, causes at least a portion of the one or more processors to perform operations comprising:
invalidating, by a target, all data in a first volume;
scanning, by a source, a hash to address table for a second volume to be migrated to the first volume; and
migrating data in the second volume to be stored in the first volume by pushing information from the hash to address table to the target, wherein migrating the data in the second volume to be stored in the first volume by pushing the information from the hash to address table to the target includes matching a page in an address to hash table to the hash to address table.

8. The computer program product of claim 7 wherein the information from each entry of the hash to address table includes a hash signature, a data page, and a list of addresses associated with the data page.

9. The computer program product of claim 7 wherein migrating the data in the second volume to be stored in the first volume by pushing the information from the hash to address table to the target includes using a write command for each page in the hash to address table.

10. The computer program product of claim 7 wherein migrating the data in the second volume to be stored in the first volume by pushing the information from the hash to address table to the target includes using a write command for each page in the hash to address table, wherein the write command includes a payload of the data page and a list of addresses where the data page is to be written.

11. The computer program product of claim 7 wherein migrating the data in the second volume to be stored in the first volume by pushing the information from the hash to address table to the target includes dynamically building the hash to address table using a prefix, wherein the hash to address table only includes hash signatures that start with the prefix.

12. The computer program product of claim 7 wherein the operations further comprise sending only content from an address to hash table to the target from the source.

13. A computing system including:
one or more memories; and
one or more processors configured to perform operations comprising:
invalidating, by a target, all data in a first volume;
scanning, by a source, a hash to address table for a second volume to be migrated to the first volume; and
migrating data in the second volume to be stored in the first volume by pushing information from the hash to address table to the target, wherein migrating the data in the second volume to be stored in the first volume by pushing the information from the hash to address table to the target includes matching a page in an address to hash table to the hash to address table.

14. The computing system of claim 13 wherein migrating the data in the second volume to be stored in the first volume by pushing the information from the hash to address table to the target includes using a write command for each page in the hash to address table.

15. The computing system of claim 13 wherein migrating the data in the second volume to be stored in the first volume by pushing the information from the hash to address table to the target includes using a write command for each page in the hash to address table, wherein the write command includes a payload of the data page and a list of addresses where the data page is to be written.

16. The computing system of claim 13 wherein migrating the data in the second volume to be stored in the first volume by pushing the information from the hash to address table to the target includes dynamically building the hash to address table using a prefix, wherein the hash to address table only includes hash signatures that start with the prefix.

17. The computing system of claim 13 wherein the operations further comprise sending only content from an address to hash table to the target from the source.

18. A computer-implemented method comprising:
invalidating, by a target, all data in a first volume;
scanning, by a source, a hash to address table for a second volume to be migrated to the first volume; and
migrating data in the second volume to be stored in the first volume by pushing information from the hash to address table to the target, wherein migrating the data in the second volume to be stored in the first volume by pushing the information from the hash to address table to the target includes dynamically building the hash to address table using a prefix, wherein the hash to address table only includes hash signatures that start with the prefix.

Assignees

• Emc Ip Holding Co Llc

Inventors

• Meiri David
• Kucherov Anton

Classifications

• G06F3/0617

  in relation to availability · CPC title

• G06F3/0647

  Migration mechanisms · CPC title

• H04L9/3247 Primary

  involving digital signatures · CPC title

• G06F3/0659

  Command handling arrangements, e.g. command buffers, queues, command scheduling · CPC title

• H04L9/0643

  Hash functions, e.g. MD5, SHA, HMAC or f9 MAC · CPC title