US 9,753,656 B2Granted

Data synchronization method, apparatus and system

AssigneeTencent Technology (Shenzhen) Company Limited

InventorsZhongwei Li, Xiaohui Zhou

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Abstract

The disclosure provides a data synchronization system, apparatus and method. A primary memory area is created at a destination end apparatus, and an incremental synchronization process is performed. A source end apparatus records a log for a write operation, including operation information and a sequence number for the operation. A latest destination-end write operation sequence number is recorded. The source end pushes in real-time write operation information corresponding to a source-end write operation sequence number greater than the latest destination-end sequence number to the destination end if a latest source-end write operation sequence number is greater than the latest destination-end sequence number. The destination end apparatus performs a write operation on the primary memory area according to the write operation information, records a write operation sequence number of the primary memory area and sends a latest write operation sequence number of the primary memory area to the source end apparatus.

Claims13

Dependent claims

A data synchronization method, comprising:

creating by a destination end apparatus, a primary memory area at the destination end apparatus;
and
performing an incremental synchronization process wherein the incremental synchronization processing comprises:
recording, by a source end apparatus, a log for a write operation, the log comprising operation information and a sequence number for the write operation;
recording by the source end apparatus, a latest destination-end write operation sequence number;
pushing in real-time, by the source end apparatus, write operation information corresponding to a source-end write operation sequence number greater than the latest destination-end write operation sequence number to the destination end apparatus, if it is determined that a latest source end write operation sequence number is greater than the latest destination-end write operation sequence number;
performing, by the destination end apparatus, a write operation on the primary memory area according to the write operation information after receiving the write operation information;
recording, by the destination end apparatus, a write operation sequence number of the destination-end primary memory area,
sending, by the destination end apparatus, a latest write operation sequence number of the destination-end primary memory area to the source end apparatus;
and
wherein if the source end apparatus determines that the latest source-end write operation sequence number is greater than the latest destination-end write operation sequence number, the incremental synchronization method comprises:
determining by the source end apparatus, whether frequency at which the source end apparatus sends data reaches a predetermined threshold;
pushing in real-time by the source end apparatus, the write operation information corresponding to the source-end write operation sequence number greater than the latest destination-end write operation sequence number to the destination end apparatus, if the frequency does not reach the threshold;
and
stopping pushing by the source end apparatus, the write operation information, if the frequency reaches the threshold.

12 more elements

A source end apparatus for data synchronization, comprising:

at least a processor coupled to a memory which stores executable instruction codes, wherein the instruction codes when executed by the processor, configures the source end apparatus to:
record a log for a write operation of the source end apparatus, the log comprising operation information and a sequence number for the write operation,
record a latest destination-end write operation sequence number, and push in real-time write operation information corresponding to a source-end write operation sequence number greater than the latest destination-end write operation sequence number to the destination end if it is determined that a latest source-end write operation sequence number is greater than the latest destination-end write operation sequence number;
and
wherein if the source end apparatus determines that the latest source-end write operation sequence number is greater than the latest destination-end write operation sequence number, the processor:
determines, whether frequency at which the source end apparatus sends data reaches a predetermined threshold;
pushes in real-time, the write operation information corresponding to the source-end write operation sequence number greater than the latest destination-end write operation sequence number to the destination end apparatus, if the frequency does not reach the threshold;
stops pushing, the write operation information, if the frequency reaches the threshold.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application: 14/752,434Filed 26 Jun 2015 · continuation
Priority: CN 2012 1 058043628 Dec 2012
Published: US 2015/0293712 A115 Oct 2015
Granted: 5 Sep 2017
Term ends: Not estimatedThe source records don’t support an estimate.

Classification9 codes

G06F 3/0614
Specifically adapted to achieve a particular effect: improving the reliability of storage systems
G06F 3/061
Specifically adapted to achieve a particular effect: improving I/O performance
G06F 3/0646
Making use of a particular technique: horizontal data movement in storage systems, i.e. moving data in between storage devices or systems
G06F 3/0647
Horizontal data movement in storage systems, i.e. moving data in between storage devices or systems: migration mechanisms