CN104317531A - Method and system for realizing multi-volume remote copy data consistency - Google Patents

Abstract

The present invention provides a method and system for realizing consistency of multi-volume remote replication data, comprising the following steps: after writing update data into multiple volumes of corresponding local disks, encapsulating the update data in chronological order through a data combiner; After the encapsulated update data packet is delivered to the data distributor through the data transmitter, the data distributor sequentially distributes the data in the encapsulated update data packet to multiple volumes of the corresponding remote disk according to the time sequence. The invention encapsulates the updated data in multiple volumes in units of groups according to time, and then sends them to the remote end, so as to realize the consistency of remote replication data of multiple volumes.

Description

A method and system for realizing multi-volume remote replication data consistency

technical field

The invention belongs to the field of computer storage, and in particular relates to a method and a system for realizing consistency of multi-volume remote replication data.

Background technique

At present, the data backup and recovery mechanism is an important means to improve data security and availability. Data backup refers to copying local source data to the remote end through the network. When the local source data is unavailable, the remote data is restored to the local, or The data from the remote end is directly provided to the upper-layer application for use, so that the business can resume normal operation. Remote replication is an important means of combating large-scale physical disasters in data management. It mainly includes two methods: application-oriented file-level replication and disk array/logical volume-oriented block-level replication. The former is closer to the upper application and is easier to implement and control Simple, but poor in versatility; the latter has strong versatility because it is transparent to applications, and does not affect the normal business of the host, especially in the application requirements of large-scale data replication.

In large and medium-sized database applications, data and logs, modification information, control information, etc. are stored in different logical volumes of the disk array. If the data on one volume is wrong, the overall data on multiple volumes will become invalid and unusable; At the same time, if the update order of the remote data changes, the remote data will be inconsistent with the local data, making the remote data unrecoverable.

Contents of the invention

The present invention provides a method and system for realizing data consistency of multi-volume remote replication to solve the above problems.

The invention provides a method for realizing multi-volume remote replication data consistency. The above method comprises the following steps:

After the update data is written into multiple volumes of the local corresponding disk, the update data is encapsulated in chronological order by the data combiner;

After the encapsulated update data packet is delivered to the data distributor through the data transmitter, the data distributor sequentially distributes the data in the encapsulated update data packet to multiple volumes of the corresponding remote disk according to the time sequence .

The present invention also provides a system for realizing multi-volume remote replication data consistency, including a data combiner, a data transmitter, and a data distributor; wherein, the data combiner is connected to the data distributor through the data transmitter;

The data combiner is configured to encapsulate the update data in chronological order and send it to the data transmitter;

The data transmitter is configured to deliver the encapsulated update data packet to the data distributor;

The data distributor is configured to sequentially distribute the data in the packaged update data package to multiple volumes of the corresponding remote disk according to the sequence of time.

Compared with the prior art, according to the method and system for realizing multi-volume remote replication data consistency provided by the present invention, the update data in multiple volumes is grouped as a unit, and the data is encapsulated in chronological order, and then sent to the remote end , so as to achieve remote replication data consistency of multiple volumes.

Description of drawings

The accompanying drawings described here are used to provide a further understanding of the present invention and constitute a part of the application. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations to the present invention. In the attached picture:

FIG. 1 is a structural diagram of a system for realizing multi-volume remote replication data consistency in Embodiment 1 of the present invention;

FIG. 2 is a flowchart of a method for realizing data consistency of multi-volume remote replication according to Embodiment 2 of the present invention.

Detailed ways

Hereinafter, the present invention will be described in detail with reference to the drawings and examples. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

Figure 1 is a structural diagram of a system for realizing multi-volume remote replication data consistency in Embodiment 1 of the present invention. The system includes: local disks LD1, LD2, LD3...LDn, data combiner 1, data transmitter 2, and data distributor 3. Remote disks RD1, RD2, RD3...RDn; wherein: the data combiner is connected to the data distributor through the data transmitter; the local disks LD1, LD2, LD3...LDn are combined with the data connected to the device; the remote disks RD1, RD2, RD3...RDn are connected to the data distributor;

The local disks LD1, LD2, LD3...LDn are used to write the received update data into multiple volumes of the corresponding local disks, and then send the update data to the data combiner 1;

Data combiner 1 is a module that acts on the local disk in the remote replication system and is responsible for the unified combination management of data, mainly including: encapsulation of updated data and time order guarantee; Send the encapsulated update packet. The data combiner 1 is configured to encapsulate the update data in chronological order and write it into a time stamp and then send it to the data transmitter 2;

The data transmitter 2 is a module for sending data and receiving returned results in the remote replication system. The main functions are: sending the encapsulated update data packet to the data distributor 3; delivering the returned result of data writing into the volume. The data transmitter 2 is further configured to transmit the encapsulated update data packet to the data distributor 3 through the IP network or the optical fiber network. The data transmitter 2 is further configured to return the writing result to the corresponding local disk after receiving the writing result returned by the data distributor 3 .

The data distributor 3 is a module that acts on the remote disk in the remote replication system and is responsible for the unified distribution and management of data. The main functions include: receiving the encapsulated update data packet sent by the data transmitter 2, and then distributing it to the corresponding remote disk; receiving the writing result fed back by the remote disk.

The remote disks RD1, RD2, RD3...RDn are used to write data in multiple volumes after receiving the data in the encapsulated update packets distributed by the data distributor 3 in chronological order; The data distributor 3 returns the writing result.

FIG. 2 is a flow chart of a method for realizing multi-volume remote replication data consistency in Embodiment 2 of the present invention, including the following steps:

Step 201: write update data in multiple volumes of the local corresponding disk LD (local disk);

Step 202: After the update data of multiple volumes is successfully written, the update data is encapsulated in chronological order by the data combiner and written into a time stamp;

Step 203: After sending the encapsulated update data packet to the data transmitter, the data transmitter transmits the encapsulated update data packet to the data distributor through the IP network or optical fiber network;

Step 204: the data distributor distributes the data in the encapsulated update data packet to multiple volumes of the corresponding remote disk RD (remote disk) in sequence according to the time sequence;

Step 205: After the data is written to the corresponding remote disk RD, return the writing result to the data distributor; the data distributor returns the writing result to the data transmitter; and the data transmitter returns the writing result to the corresponding local disk.

Compared with the prior art, according to the method and system for realizing multi-volume remote replication data consistency provided by the present invention, the update data in multiple volumes is grouped as a unit, and the data is encapsulated in chronological order, and then sent to the remote end , so as to achieve remote replication data consistency of multiple volumes.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (9)

1. realize a multireel consistency of remote copy data method, it is characterized in that, comprise the following steps:

After multiple volumes of disk corresponding for more new data write this locality, will more be encapsulated according to time sequencing by data binner by new data;

After more new data packets after encapsulation is passed to data distributor by data link, described data distributor according to time sequencing, successively by the Data dissemination in the more new data packets after encapsulation in multiple volumes of corresponding far-end disk.

2. method according to claim 1, is characterized in that: by multiple volumes of disk LD corresponding for more new data write this locality; After more new data is written to merit of multiple volume, more encapsulation will be carried out by data binner according to time sequencing and the write time marks by new data.

3. method according to claim 2, is characterized in that: by the renewal Packet Generation after encapsulation to data link, and the more new data packets after encapsulation is passed to data distributor by IP network or fiber optic network by described data link.

4. the method according to any one of claim 1-3, is characterized in that: after the far-end disk that data write is corresponding, return write result to described data distributor; Described data distributor returns write result to described data link; Described data link returns write result to local corresponding disk.

5. realize a multireel consistency of remote copy data system, it is characterized in that, comprise data binner, data link, data distributor; Wherein, described data binner is connected with described data distributor by described data link;

Described data binner, for being more sent to described data link by new data after encapsulating according to time sequencing;

Described data link, for by encapsulation after renewal data packet delivery to data distributor;

Described data distributor, for according to time sequencing, successively by multiple volumes of far-end disk extremely corresponding for the Data dissemination in the more new data packets after encapsulation.

6. system according to claim 5, is characterized in that, also comprises local terminal disk, far-end disk; Wherein, described local terminal disk is connected with described data binner; Described far-end disk is connected with described data distributor;

Described local terminal disk, after in multiple volumes of the disk that the more new data write this locality for receiving is corresponding, more will be sent to described data binner by new data;

Described far-end disk, after receiving the data in the more new data packets after encapsulation that described data distributor distributes according to time sequencing, writes in multiple volume; Also for returning write result to described data distributor.

7. system according to claim 5, is characterized in that: described data binner, also for more carrying out encapsulation and write time mark according to time sequencing by new data.

8. system according to claim 5, its spy is being: described data link, also for the more new data packets after encapsulation is passed to data distributor by IP network or fiber optic network.

9. system according to claim 5, is characterized in that: described data distributor, also for receiving the write result that far-end disk returns; Described data link, also for after receiving write result that described data distributor returns, returns write result to local corresponding disk.