Data processing system including a host distributing data across multiple memory systems and method for the same

• US 10,585,792 B2
• Filed: 12/05/2017
• Issued: 03/10/2020
• Est. Priority Date: 05/29/2017
• Status: Active Grant

• Current Assignee: SK Hynix Inc.
• Original Assignee: SK Hynix Inc.
• Inventors: Shin, Soong-sun, Koo, Duck-Hoi, Kim, Yong-Tae, Jeong, Cheon-Ok
• Primary Examiner(s): Rones, Charles
• Assistant Examiner(s): Li, Hewy H
• Application Number:
  US15/832,005
• Publication Number:
  US 20180341577A1
• Time in Patent Office: 826 Days
• Field of Search: None
• CPC Class Codes: G06F 11/1048 using arrangements adapted for a specific error detection or correction feature
• CPC Class Codes: G06F 11/1076 Parity data used in redundant arrays of independent storages, e.g. in RAID systems
• CPC Class Codes: G06F 11/1435 using file system or storage system metadata
• CPC Class Codes: G06F 12/0246 in block erasable memory, e.g. flash memory
• CPC Class Codes: G06F 3/061 Improving I/O performance
• CPC Class Codes: G06F 3/0616 in relation to life time, e.g. increasing Mean Time Between Failures [MTBF]
• CPC Class Codes: G06F 3/0619 in relation to data integrity, e.g. data losses, bit errors
• CPC Class Codes: G06F 3/064 Management of blocks
• CPC Class Codes: G06F 3/065 Replication mechanisms
• CPC Class Codes: G06F 3/0659 Command handling arrangements, e.g. command buffers, queues, command scheduling
• CPC Class Codes: G06F 3/0683 Plurality of storage devices
• CPC Class Codes: G06F 3/0689 Disk arrays, e.g. RAID, JBOD
• 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

A data processing system includes a host suitable for providing an access request; and a plurality of memory systems suitable for storing or reading data thereto or therefrom in response to the access request, wherein the host includes a host memory buffer suitable for storing a plurality of meta-data respectively corresponding to the plurality of memory systems, wherein each of the plurality of meta-data includes a first threshold value representing storage capacity for user data in a corresponding memory system among the plurality of memory systems, a second threshold value representing a number of read operations for logical block addresses (LBAs) of the corresponding memory system, a third threshold value representing a temperature of the corresponding memory system and respective LBAs of the plurality of memory systems.

Claims

1. A data processing system comprising:

a host configured to provide an access request; and

a plurality of memory systems configured to store or read data thereto or therefrom in response to the access request,

wherein the host includes a host memory buffer configured to store a plurality of meta-data respectively corresponding to the plurality of memory systems,

wherein each of the plurality of meta-data includes a first threshold value representing unused storage capacity for user data in a memory system of the plurality of memory systems corresponding to the meta-data, a second threshold value representing a number of read operations for logical block addresses (LBAs) of the corresponding memory system, a third threshold value representing a temperature of the corresponding memory system, and LBAs of the corresponding memory system of the plurality of memory systems.

2. The data processing system of claim 1,

wherein the host further updates the plurality of meta-data including the first threshold values corresponding to the plurality of memory systems in response to requests from the plurality of memory systems, respectively, and

wherein the host further divides data having a greater size than the first threshold value among sequentially generated data such that each of a plurality of divided data has a predetermined size, and controls the plurality of memory systems to store the divided data in a distributed way.

3. The data processing system of claim 1, wherein the host further controls the plurality of memory systems to store the data in a distributed way according to a security level of the data.

4. The data processing system of claim 3, wherein the host further controls the plurality of memory systems to store one or more of duplicated data and parity data corresponding to the data stored in a distributed way according to the security level of the data.

5. The data processing system of claim 1,

wherein the host further updates the plurality of meta-data including the LBAs corresponding to the plurality of memory systems in response to requests from the plurality of memory systems, respectively, and

wherein the host further controls the plurality of memory systems to store the data in a distributed way according to the plurality of updated meta-data.

6. The data processing system of claim 5, wherein the host further controls the plurality of memory systems to store parity data and duplicated data corresponding to the data in another memory system, which is different from a memory system storing the data, among the plurality of memory systems when the data is stored in the memory system.

7. The data processing system of claim 1,

wherein the host further updates the plurality of meta-data including the second threshold values corresponding to the plurality of memory systems in response to requests from the plurality of memory systems, respectively,

wherein, when a first data stored in a first memory system among the plurality of memory systems is read a greater number of times than the second threshold value included in the plurality of updated meta-data, the host further controls the plurality of memory systems to move the first data to a second memory system among the plurality of memory systems, and

wherein the second memory system requests the host to update a meta-data corresponding to the second memory system among the plurality of meta-data such that the meta-data corresponding to the second memory system includes the LBA corresponding to the first data.

8. The data processing system of claim 1,

wherein the host further updates the plurality of meta-data including the third threshold values corresponding to the plurality of memory systems in response to requests from the plurality of memory systems, respectively, and

wherein the host further controls the plurality of memory systems to throttle one or more memory systems having a greater temperature than the third threshold value among the plurality of memory systems.

9. The data processing system of claim 8, wherein the host further controls the plurality of memory systems to first store the data in another memory system other than the throttled memory systems among plurality of memory systems.

10. The data processing system of claim 8, wherein, when data is to be read from the throttled memory systems, the host further controls the plurality of memory systems to read duplicated data corresponding to the data to be read and stored in another memory system other than the throttled memory system among the plurality of memory systems.

11. The data processing system of claim 1, wherein

the host is configured to access memory systems according to a redundant array of independent disks (RAID) levels without utilizing a RAID controller which consumes physical space, and access the plurality of meta-data respectively corresponding to the plurality of memory systems and stored in the host memory buffer of the host, and

wherein the host controls, based on the meta-data, the memory systems to store user data in a distributed way for balancing storage capacities and access counts of the memory systems.

12. An operating method of a data processing system including a host having a host memory buffer and including a plurality of memory systems, the operating method comprising:

a first step of updating, by the host, a plurality of meta-data stored in the host memory buffer of the host and corresponding to the plurality of memory systems in response to requests from the plurality of memory systems, respectively; and

a second step of controlling, by the host, the plurality of memory systems to store data in a distributed way according to the plurality of meta-data,

wherein each of the plurality of meta-data includes a first threshold value representing unused storage capacity for user data in a memory system of the plurality of memory systems corresponding to the meta-data, a second threshold value representing a number of read operations for logical block addresses (LBAs) of the corresponding memory system, a third threshold value representing a temperature of the corresponding memory system, and LBAs of the corresponding memory system of the plurality of memory systems.

13. The operating method of claim 12,

wherein the first step is performed by updating the plurality of meta-data including the first threshold values corresponding to the plurality of memory systems in response to requests from the plurality of memory systems, respectively, and

wherein the second step is performed by dividing data having a greater size than the first threshold value among sequentially generated data such that each of a plurality of divided data has a predetermined size, and controlling the plurality of memory systems to store the divided data in a distributed way.

14. The operating method of claim 12, wherein the second step is performed by further controlling the plurality of memory systems to store the data in a distributed way according to a security level of the data.

15. The operating method of claim 14, further comprising controlling, by the host, the plurality of memory systems to store one or more of duplicated data and parity data corresponding to the data stored in a distributed way according to the security level of the data.

16. The operating method of claim 12,

wherein the first step is performed by updating the plurality of meta-data including the LBAs corresponding to the plurality of memory systems in response to requests from the plurality of memory systems, respectively, and

wherein the second step is performed by controlling the plurality of memory systems to store the data in a distributed way according to the plurality of updated meta-data.

17. The operating method of claim 16, further comprising controlling, by the host, the plurality of memory systems to store parity data and duplicated data corresponding to the data in another memory system, which is different from a memory system storing the data, among the plurality of memory systems when the data is stored in the memory system.

18. The operating method of claim 12,

wherein the first step is performed by updating the plurality of meta-data including the second threshold values corresponding to the plurality of memory systems in response to requests from the plurality of memory systems, respectively, and

further comprising, when a first data stored in a first memory system among the plurality of memory systems is read a greater number of times than the second threshold value included in the plurality of updated meta-data:

a third step of controlling, by the host, the plurality of memory systems to move the first data to a second memory system among the plurality of memory systems; and

a fourth step of requesting, by the second memory system, the host to update a meta-data corresponding to the second memory system among the plurality of meta-data such that the meta-data corresponding to the second memory system includes the LBA corresponding to the first data.

19. The operating method of claim 12,

wherein the first step is performed by updating the plurality of meta-data including the third threshold values corresponding to the plurality of memory systems in response to requests from the plurality of memory systems, respectively, and

wherein the second step is performed by controlling the plurality of memory systems to throttle one or more memory systems having a greater temperature than the third threshold value among the plurality of memory systems.

20. The operating method of claim 19, further comprising controlling, by the host, the plurality of memory systems to first store the data in another memory system other than the throttled memory systems among plurality of memory systems.

21. The operating method of claim 19, further comprising controlling, by the host, when data is to be read from the throttled memory systems, the plurality of memory systems to read duplicated data corresponding to the data to be read and stored in another memory system other than the throttled memory system among the plurality of memory systems.

22. A data processing system comprising:

a host having a host memory buffer which is configured to store a plurality of meta-data; and

a plurality of memory systems configured to store or read data in response to an access request made from the host,

wherein each meta-data of the plurality of meta-data corresponds to a different memory system of the plurality of memory systems,

wherein the meta-data for the different memory system includes logical block addresses

(LBAs), unused storage capacity for user data, a number of read operations for the LBAs, and a temperature,

wherein the host updates the corresponding meta-data including the LBAs in response to requests made from the different memory system, and

wherein the host controls the plurality of memory systems to store data in a distributed manner according to the updated meta-data for each memory system of the plurality of memory systems.