Management of data in multi-storage systems that can include non-volatile and volatile storages

Patent metadata

Field	Value
Publication number	US-9703505-B2
Application number	US-201414573781-A
Country	US
Kind code	B2
Filing date	Dec 17, 2014
Priority date	Dec 30, 2013
Publication date	Jul 11, 2017
Grant date	Jul 11, 2017

Abstract

Techniques for management of data in multi-storage systems allow managing storage of data in a first storage of multiple storages in a multi-storage system based on the temperature of the data (or data temperature) obtained for a second storage of the multiple storages in a multi-storage system. For example, in a multi-storage system that includes at least one non-volatile storage (e.g., one or more HDDs) and at least one volatile storage (e.g., a cache memory device), the storage of a particular data portion (e.g., a storage unit of data) for the at least one volatile storage can be managed based on a temperature of the data determined for the non-volatile storage. By way of example, persistent temperatures used for management of data in a non-volatile storage system (e.g., a multi-tier storage of a database system) can be used to effectively manage the storage of the data in a cache memory that is typically provided for improving performance by keeping data that is likely to be used in the cache memory. As a result, overall performance of a system can be further enhanced by allowing persistent temperature measurements to be used in managing cache memory, instead of solely relying on conventional techniques for caching data which typically do not take into account persistent temperatures associated with a non-volatile storage environment.

First claim

What is claimed is:

1. A method of managing data in a multi-storage system that includes multiple storages for storage of the data, the multi-storage system including at least two storages that differ from each other with respect to one or more criteria, wherein the method is implemented at least partly by a device, and wherein the method comprises:
managing storage of data in a first one of the multiple storages, based on a temperature value of the data associated with a second one of the multiple storages, wherein:
the temperature value of the data is indicative of one or more storage management policies with respect to storage of the data in the at least two storages based on the one or more differing characteristics;
the one or more differing characteristics include volatility and/or persistence of storage of the data; and
managing the storage of data further comprises managing the storage of data for a volatile storage of the multi-storage system, based on a temperature of the data obtained for a non-volatile storage of the multi-storage system.

2. The method of claim 1 , wherein each one of the multiple storages include one or more of the following: one or more storage environments, one or more storage devices, one or more pools of storage resources, and one or more groups of storage devices.

3. The method of claim 1 , wherein the one or more differing characteristics include a relative storage tier-level associated with storage of the data in the multiple-storage system, and wherein the managing the storage of data further comprises: managing the storage of data for one of multiple storage tier-levels of the multi-storage system, based on a temperature of the data obtained for at least another one of the multiple storage tier-levels.

4. The method of claim 1 , the temperature of the data obtained for the second one of the multiple storages is based on one or more of the following:
temperature of the data as determined and/or measured at the second one of the multiple storages, temperature of the data as determined and/or measured specifically for the second one of the multiple storages, temperature of the data as determined and/or measured in the second one of the multiple storages, temperature of the data as determined and/or measured based on access of data stored in the second one of the multiple storages, temperature of the data as determined and/or measured based on access of data stored in the multiple storages as a whole, temperature of the data as assigned, temperature of the data as assigned by user input, and temperature of the data as determined based on user input.

5. The method of claim 1 , wherein the method further comprises:
providing the temperature value of the data associated with a second one of the multiple storages to the first one of the multiple storages.

6. The method of claim 1 ,
wherein the first one of the multiple storages is a volatile storage device and the second one of the multiple storages is a non-volatile storage device, and
wherein the method further comprises:
sending, by the non-volatile storage device, the temperature value of the data stored in the non-volatile storage device, to the volatile storage device.

7. A method of managing data in a multi-storage system that includes at least one non-volatile storage and at least one volatile storage, wherein the method is implemented at least partly by a device, and wherein the method comprises:
managing storage of data for one of the multiple storages based on a determined temperature of the data as determined for a second one of the multiple storages comprising managing the storage of data for the volatile storage based on the temperature of the data obtained for the at least one non-volatile storage.

8. The method of claim 7 , wherein the temperature of the data is a persistent temperature assigned to the data as determined and/or measured for storage of the data in the at least one nonvolatile storage.

9. The method of claim 8 , wherein the method further comprises: identifying, based on the persistent temperature of the data, data to be stored in the at least one volatile storage.

10. The method of claim 8 , wherein the method further comprises one or more of the following: periodically identifying, based on the persistent temperature of data, first data to be stored in the at least one volatile storage; and dynamically updating based on the persistent temperature of data, first data to be stored in the at least one volatile storage.

11. The method of claim 8 , wherein the managing the storage of data for the at least one volatile storage based on the temperature of the data obtained for the at least one non-volatile storage further comprises one or more of the following; determining, based on the persistent temperature, whether to store the data in the at least one volatile storage; determining, based on the persistent temperature, whether to remove and/or move the data from the at least one volatile storage.

12. The method of claim 8 , wherein the at least one volatile storage includes at least one cache memory provided as a caching mechanism for storing data.

13. A method of managing data in a multi-storage system that includes at least one non-volatile storage and at least one volatile storage, wherein the method is implemented at least partly by a device, and wherein the method comprises:
managing storage of data for one of the multiple storages based on a determined temperature of the data as determined for a second one of the multiple storages comprising managing the storage of data for the volatile storage based on the temperature of the data as determined and/or measured for the non-volatile storage.

14. An apparatus that includes one or more processors operable to manage data in a multi-storage system that includes multiple storages for storage of the data, the multi-storage system including at least two storages that differ from each other with respect to one or more criteria, wherein the one or more processors are also operable to:
manage storage of data in a first one of the multiple storages, based on a temperature value of the data associated with a second one of the multiple storages, wherein:
the temperature value of the data is indicative of one or more storage management policies with respect to storage of the data in the at least two storages based on the one or more differing characteristics;
the one or more differing characteristics include volatility and/or persistence of storage of the data; and
managing the storage of data further comprises managing the storage of data for a volatile storage of the multi-storage system, based on a temperature of the data obtained for a non-volatile storage of the multi-storage system.

15. The apparatus of claim 14 , wherein the managing storage of data in a first one of the multiple storages does not include moving data between the first and second multiple storage devices.

16. A non-transitory computer readable storage medium that stores at least executable computer code for managing data in a multi-storage system that includes multiple storages for storage of the data, the multi-storage system including at least two storages that differ from each other with respect to one or more criteria, wherein the executable computer when executed manages storage of data in a first one of the multiple storages, based on a temperature value of the data associated with a second one of the multiple storages, wherein:
the temperature value of the data is indicative of one or more storage management policies with respect to storage of the data in the at

Assignees

• Teradata Us Inc

Inventors

• Boyle Wayne R
• Benton Philip J
• Pederson Donald

Classifications

• G06F3/065

  Replication mechanisms · CPC title

• G06F12/0866

  for peripheral storage systems, e.g. disk cache · CPC title

• G06F12/122 Primary

  of the least frequently used [LFU] type, e.g. with individual count value · CPC title

• G06F3/0655 Primary

  Vertical data movement, i.e. input-output transfer; data movement between one or more hosts and one or more storage devices · CPC title

• G06F12/121

  using replacement algorithms · CPC title