Write cache system and method for data chunk bypass and acknowledgment of write of data chunk

Patent metadata

Field	Value
Publication number	US-10853237-B2
Application number	US-201816220941-A
Country	US
Kind code	B2
Filing date	Dec 14, 2018
Priority date	Mar 31, 2016
Publication date	Dec 1, 2020
Grant date	Dec 1, 2020

Abstract

A method, computer program product, and computer system for receiving, at a first computing device, a first data chunk sent from a second computing device. It may be determined that the first data chunk includes a first type of data. The first data chunk may be stored to a cache operatively coupled to the first computing device based upon, at least in part, determining that the first data chunk includes the first type of data, wherein the cache may include a first storage device type. An acknowledgement of a successful write of the first data chunk to the second computing device may be sent based upon, at least in part, a successful storing of the first data chunk to the cache operatively coupled to the first computing device.

First claim

What is claimed is:

1. A computer-implemented method comprising:
receiving, at a first computing device, a data chunk sent from a second computing device;
determining whether the data chunk includes one of a first type of data and a second type of data;
in response to determining that the data chunk includes the first type of data:
storing the data chunk in a cache operatively coupled to the first computing device, wherein the cache includes a first storage device type,
sending an acknowledgement of a successful write of the data chunk based upon, at least in part, a successful storing of the data chunk in the cache, and
copying the data chunk from the cache to a second storage device type;

in response to determining that the data chunk includes the second type of data:
storing the data chunk in the second storage device type, wherein the data chunk bypasses the cache, and
sending an acknowledgement of a successful write of the data chunk based upon, at least in part, a complete storing of the data chunk in the second storage device.

2. The computer-implemented method of claim 1 wherein the first type of data includes at least one of user data and a journal entry.

3. The computer-implemented method of claim 1 further comprising determining a capacity used by the cache.

4. The computer-implemented method of claim 3 further comprising starting a cleaning of the cache based upon, at least in part, determining that the capacity used by the cache is above a first threshold.

5. The computer-implemented method of claim 4 further comprising halting the cleaning of the cache based upon, at least in part, determining that the capacity used by the cache is below a second threshold.

6. The computer-implemented method of claim 4 further comprising dumping one or more cache files stored within the cache.

7. The computer-implemented method of claim 6 further comprising cleaning the one or more cache files from the cache in response to dumping the one or more cache files stored within the cache.

8. A computer program product residing on a non-transitory computer readable storage medium having a plurality of instructions stored thereon which, when executed by a processor, cause the processor to perform operations comprising:
receiving, at a first computing device, a data chunk from a second computing device;
determining whether the data chunk includes one of a first type of data and a second type of data;
in response to determining that the data chunk includes the first type of data:
storing the data chunk in a cache operatively coupled to the first computing device, wherein the cache includes a first storage device type,
sending an acknowledgement of a successful write of the data chunk based upon, at least in part, a successful storing of the data chunk to the cache, and
copying the data chunk from the cache to a second storage device type;

in response to determining that the data chunk includes the second type of data:
storing the data chunk in the second storage device type, wherein the data chunk bypasses the cache, and
sending an acknowledgement of a successful write of the data chunk based upon, at least in part, a complete storing of the data chunk in the second storage device.

9. The computer program product of claim 8 wherein the first type of data includes at least one of user data and a journal entry.

10. The computer program product of claim 8 further comprising determining a capacity used by the cache.

11. The computer program product of claim 10 further comprising starting a cleaning of the cache based upon, at least in part, determining that the capacity used by the cache is above a first threshold.

12. The computer program product of claim 11 further comprising halting the cleaning of the cache based upon, at least in part, determining that the capacity used by the cache is below a second threshold.

13. The computer program product of claim 11 further comprising dumping one or more cache files stored within the cache.

14. The computer program product of claim 13 further comprising cleaning the one or more cache files from the cache in response to dumping the one or more cache files stored within the cache.

15. A computing system including a processor and a memory configured to perform operations comprising:
receiving, at a first computing device, a first data chunk sent from a second computing device;
determining whether the data chunk includes one of a first type of data and a second type of data;
in response to determining that the data chunk includes the first type of data:
storing the data chunk to a cache operatively coupled to the first computing device, wherein the cache includes a first storage device type,
sending an acknowledgement of a successful write of the data chunk to the second computing device based upon, at least in part, a successful storing of the data chunk to the cache, and
copying the data chunk from the cache to a second storage device type;

in response to determining that the data chunk includes the second type of data:
storing the data chunk in the second storage device type, wherein the data chunk bypasses the cache, and
sending an acknowledgement of a successful write of the data chunk based upon, at least in part, a complete storing of the data chunk in the second storage device.

16. The computing system of claim 15 wherein the first type of data includes at least one of user data and a journal entry.

17. The computing system of claim 15 further comprising determining a capacity used by the cache.

18. The computing system of claim 17 further comprising starting a cleaning of the cache based upon, at least in part, determining that the capacity used by the cache is above a first threshold.

19. The computing system of claim 17 further comprising dumping one or more cache files stored within the cache.

20. The computing system of claim 19 further comprising cleaning the one or more cache files from the cache in response to dumping the one or more cache files stored within the cache.

Assignees

• Emc Ip Holding Co Llc

Inventors

• Danilov Mikhail
• Fomin Andrey
• Rakulenko Alexander
• Malygin Mikhail
• Wang Chen

Classifications

• G06F3/0656

  Data buffering arrangements · CPC title

• G06F3/0689

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

• G06F3/061

  Improving I/O performance · CPC title

• G06F2212/222

  Non-volatile memory · CPC title

• G06F2212/7207

  management of metadata or control data · CPC title