Write cache acknowledgement system and method

Patent metadata

Field	Value
Publication number	US-10157125-B2
Application number	US-201715398979-A
Country	US
Kind code	B2
Filing date	Jan 5, 2017
Priority date	Mar 31, 2016
Publication date	Dec 18, 2018
Grant date	Dec 18, 2018

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 a first data chunk sent from a second computing device;
determining that the first data chunk includes a first type of data;
storing the first data chunk in a cache based upon, at least in part, determining that the first data chunk includes the first type of data, wherein the cache includes a first storage device type;
sending an acknowledgement of a successful write of the first data chunk based upon, at least in part, a successful storing of the first data chunk in the cache;
copying the first data chunk from the cache to a second storage device type;
receiving a second data chunk;
determining that the second data chunk includes a second type of data;
storing the second data chunk in the second storage device type based upon, at least in part, determining that the second data chunk includes the second type of data, wherein the second data chunk bypasses the cache; and
sending an acknowledgement of a successful write of the second data chunk based upon, at least in part, a complete storing of the second 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. 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 a first data chunk;
determining that the first data chunk includes a first type of data;
storing the first data chunk in a cache based upon, at least in part, determining that the first data chunk includes the first type of data, wherein the cache includes a first storage device type;
sending an acknowledgement of a successful write of the first data chunk based upon, at least in part, a successful storing of the first data chunk to the cache;
copying the first data chunk from the cache to a second storage device type;
receiving a second data chunk;
determining that the second data chunk includes a second type of data;
storing the second data chunk in the second storage device type based upon, at least in part, determining that the second data chunk includes the second type of data, wherein the second data chunk bypasses the cache; and
sending an acknowledgement of a successful write of the second data chunk based upon, at least in part, a complete storing of the second data chunk in the second storage device.

7. The computer program product of claim 6 wherein the first type of data includes at least one of user data and a journal entry.

8. The computer program product of claim 6 further comprising determining a capacity used by the cache.

9. The computer program product of claim 8 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.

10. The computer program product of claim 9 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.

11. 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 that the first data chunk includes a first type of data;
storing the first data chunk 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 includes a first storage device type;
sending an acknowledgement of a successful write of the first data chunk to the second computing device based upon, at least in part, a successful storing of the first data chunk to the cache operatively coupled to the first computing device;
copying the first data chunk from the cache to a second storage device type;
receiving, at the first computing device, a second data chunk sent from the second computing device;
determining that the second data chunk includes a second type of data;
storing the second data chunk to the second storage device type operatively coupled to the first computing device based upon, at least in part, determining that the second data chunk includes the second type of data, wherein the second data chunk bypasses the cache; and
sending an acknowledgement of a successful write of the second data chunk to the second computing device based upon, at least in part, a complete storing of the second data chunk to the second storage device type operatively coupled to the first computing device.

12. The computing system of claim 11 wherein the first type of data includes at least one of user data and a journal entry.

13. The computing system of claim 11 further comprising determining a capacity used by the cache.

14. The computing system of claim 13 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.

Assignees

• Emc Ip Holding Co Llc

Inventors

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

Classifications

• G06F2212/7208

  Multiple device management, e.g. distributing data over multiple flash devices · CPC title

• G06F2212/7203

  Temporary buffering, e.g. using volatile buffer or dedicated buffer blocks · CPC title

• G06F2212/222

  Non-volatile memory · CPC title

• G06F2212/7207

  management of metadata or control data · CPC title

• G06F3/06

  Digital input from, or digital output to, record carriers {, e.g. RAID, emulated record carriers or networked record carriers} · CPC title