Dynamic parities mechanism

Patent metadata

Field	Value
Publication number	US-9971648-B1
Application number	US-201514982971-A
Country	US
Kind code	B1
Filing date	Dec 29, 2015
Priority date	Dec 29, 2015
Publication date	May 15, 2018
Grant date	May 15, 2018

Abstract

A system, computer program product, and computer-executable method of managing parity data of a Redundant Array of Independent Disks (RAID) on a data storage system, where the data storage system stores a first set of parity data and retains metadata associated with the first set of parity data, the system, computer program product, and computer-executable method including allocating a set of locations on the data storage system for a second set of parity data, processing the second set of parity data, and updating the metadata associated with the first set of parity data.

First claim

What is claimed is:

1. A computer-executable method of managing parity data of a Redundant Array of Independent Disks (RAID) on a data storage system, where the data storage system stores a first set of parity data and retains metadata associated with the first set of parity data, the computer-executable method comprising:
allocating a set of locations on the data storage system for a second set of parity data;
processing the second set of parity data; and
updating the metadata associated with the first set of parity data, wherein updating the metadata comprises modifying the metadata associated with the first set of parity to be associated with the second set of parity data, wherein the metadata now corresponds to the second set of parity data.

2. The computer-executable method of claim 1 , wherein processing the second set of parity data comprises writing the second set of parity data to the set of locations on the data storage system.

3. The computer-executable method of claim 2 , wherein the set of locations on the data storage system differ from the location of the first set of parity data.

4. The computer-executable method of claim 1 , further comprising removing the first set of parity data.

5. A system, comprising:
a data storage system implementing a Redundant Array of Independent Disks (RAID), wherein the data storage system stores a first set of parity data and retains metadata associated with the first set of parity data; and
computer-executable program logic encoded in memory of one or more computers enabled to manage parity data on the data storage system, wherein the computer-executable program logic is configured for the execution of:
allocating a set of locations on the data storage system for a second set of parity data;
processing the second set of parity data; and
updating the metadata associated with the first set of parity data, wherein updating the metadata comprises modifying the metadata associated with the first set of parity to be associated with the second set of parity data, wherein the metadata now corresponds to the second set of parity data.

6. The system of claim 5 , wherein processing the second set of parity data comprises writing the second set of parity data to the set of locations on the data storage system.

7. The system of claim 6 , wherein the set of locations on the data storage system differ from the location of the first set of parity data.

8. The system of claim 5 , wherein the computer-executable program logic is further configured for the execution of removing the first set of parity data.

9. A computer program product for managing parity data of a Redundant Array of Independent Disks (RAID) on a data storage system, where the data storage system stores a first set of parity data and retains metadata associated with the first set of parity data, the computer program product comprising:
a non-transitory computer readable medium encoded with computer-executable code, the code configured to enable the execution of:
allocating a set of locations on the data storage system for a second set of parity data;
processing the second set of parity data; and
updating the metadata associated with the first set of parity data, wherein updating the metadata comprises modifying the metadata associated with the first set of parity to be associated with the second set of parity data, wherein the metadata now corresponds to the second set of parity data.

10. The computer program product of claim 9 , wherein processing the second set of parity data comprises writing, the second set of parity data to the set of locations on the data storage system.

11. The computer program product of claim 10 , wherein the set of locations on the data storage system differ from the location of the first set of parity data.

12. The computer program product of claim 9 , wherein the code is further configured to enable the execution of removing the first set of parity data.

Assignees

• Emc Corp
• Emc Ip Holding Co Llc

Inventors

• Schneider Zvi
• Ben-Moshe Tal
• Farhi Niko
• Kamran Lior

Classifications

• G06F11/1076 Primary

  Parity data used in redundant arrays of independent storages, e.g. in RAID systems · CPC title

• G06F3/0619

  in relation to data integrity, e.g. data losses, bit errors · CPC title

• G06F3/0689

  Disk arrays, e.g. RAID, JBOD · CPC title

• G06F3/064

  Management of blocks · CPC title