CN107577564A - A kind of method that dual-active system is realized based on block simultaneous techniques - Google Patents
A kind of method that dual-active system is realized based on block simultaneous techniques Download PDFInfo
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- CN107577564A CN107577564A CN201710607424.8A CN201710607424A CN107577564A CN 107577564 A CN107577564 A CN 107577564A CN 201710607424 A CN201710607424 A CN 201710607424A CN 107577564 A CN107577564 A CN 107577564A
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Abstract
The present invention relates to database technical field, discloses a kind of method that dual-active system is realized based on block simultaneous techniques, comprises the following steps：A storage server is selected in (1) first computer room and the second computer room respectively, and the memory space of formed objects is distributed in storage server, they are made up to two pieces of quorum disks of mirror image each other of block device simultaneous techniques；(2) quorum disk of the two mirror images each other is made to share quorum disk for the cluster of the first computer room and the second computer room；(3) request of data of write-in is issued by network the quorum disk of another computer room, is consistent two quorum disk data contents；(4) there are abnormal conditions in the first computer room or the second computer room, another normal computer room can access the quorum disk of normal computer room and the shared quorum disk of normal computer room.The present invention will not be affected when a block device goes wrong and can still be operated storage and data and back up for another piece, ensure that the continuity of work.
Description
Technical field
The present invention relates to database technical field, more particularly to a kind of side that dual-active system is realized based on block simultaneous techniques
Method.
Background technology
ORACLE RAC are a kind of parallel schemas in database, it is ensured that all members of cluster can connect simultaneously
The request of client is received, Oracle RAC mainly support Oracle9i, 10g, 11g, 12c version, can support that 24x 7 is effective
Database application system, high availability data-base system, and free application deployment are built on inexpensive server, without repairing
Change code.Under Oracle RAC environment, Oracle companies are integrated to provide clustered software and storage management software, when application is advised
When mould needs to expand, user can extend system on demand, to ensure the performance of system.
Dual-active system is done using Oracle RAC RAC different nodes are stored in different computer rooms, so can be with
Accomplish that another computer room normally can also externally provide service after a computer room powers off, it is possible to prevente effectively from because computer room power-off is led
The problem of causing database external service disruption.Although the dual-active framework based on Oracle RAC is very perfect, wherein there is one very
Strong limitation, the quorum disk quantity that voting effect is played when cluster fissure must be odd number block (2n+1), and this
It is all shared to all nodes of cluster that storage under kind framework, which all must be, i.e., each machine has to that one can be had access to
In the shared storage of individual or multiple identicals.And need to ensure that the disk in voting disk group keeps more than half available, it
Voting function, which could normally be provided, prevents cluster from fissure occurs.Based on this limitation, at present for the quorum disk of dual-active framework
The solution of storage mode has two kinds, the first, two computer rooms difference quorum disk of dual-active system, but due to arbitrating magnetic
Disk quantity is odd number, so necessarily having a computer room (n+1) to store one piece of quorum disk than another computer room (n) more.But
In this case the defects of is exactly the computer room power-off or damage when storage n+1 block quorum disks, then whole cluster can all be hung
The service that can not externally provide is played, and another computer room will due to that can only have access to n blocks quorum disk before this computer room is replied
It can not be pulled up always, this will have a strong impact on the high availability of dual-active system.Second, two computer rooms of dual-active system are being set
The quorum disk of identical quantity is deposited respectively, opens up third party's either the 3rd computer room storage independent one piece or polylith arbitration magnetic
Disk.This scheme can effectively solve the defects of the first scheme, but due to having opened up the 3rd computer room and it also requires matching somebody with somebody
Shared storage is put, this framework ancillary cost can be extremely expensive.
The content of the invention
The present invention is directed to the shortcomings that framework in existing dual-active architecture technology is complicated and expensive, dual-active availability is low, there is provided
A kind of method that dual-active system is realized based on block simultaneous techniques, quorum disk is individually deposited not opening up the 3rd extra computer room
On the premise of, make to realize that whichever computer room of two computer rooms of dual-active occurs in the case of powering off or being disabled, another machine
Room is all without being affected, so as to realize dual-active framework truly.
In order to solve the above-mentioned technical problem, the present invention is addressed by following technical proposals.
A kind of method that dual-active system is realized based on block simultaneous techniques, is comprised the following steps：
(1) the first computer room and the second computer room are provided with local cluster server, in the first computer room and the second computer room respectively
A storage server is selected, and the memory space of formed objects is distributed in storage server, is driven by a block device
It is dynamic, and the space for respectively distributing them generates block device, they are made by mirror image each other by block device simultaneous techniques
Two pieces of quorum disks；
(2) two pieces of quorum disks convey cluster server of the data to local computer room by iscsi technologies, make the two mutual
Quorum disk for mirror image is the shared quorum disk of cluster of the first computer room and the second computer room；
(3) when the first computer room or the second computer room receive request write-in quorum disk, data only write local arbitration magnetic
In disk, then the request of data of write-in is issued by network the quorum disk of another computer room, make two quorum disk data
Content is consistent；
(4) there are abnormal conditions in the first computer room or the second computer room, another normal computer room can access normal computer room
Quorum disk and normal computer room shared quorum disk, the quorum disk having access to exceedes half, according to oracle database
The rule of cluster is normal externally to provide service.
Preferably, in step (1), when two computer room synchronizing networks used in this two pieces each other quorum disk of mirror image
Go wrong, the quorum disk of one of computer room is carried out to be set to the state that can not be read and write.
The present invention has significant technique effect as a result of above technical scheme：By at two of different computer rooms
Storage server distributes certain space, the two spaces is generated into block device respectively by Block Device Driver, then by this
Two block devices are only conveyed to the RAC clustered node servers of local computer room as the quorum disk in Oracle RAC respectively,
When a block device goes wrong, another piece will not be affected and can still be operated storage and data and back up,
So it can also ensure that another computer room cluster also has n+1 blocks quorum disk to access in the case where a computer room powers off
So as to ensure that Oracle RAC can work on, the continuity of work ensure that.
Brief description of the drawings
Fig. 1 is the schematic diagram of operating structure in a kind of method that dual-active system is realized based on block simultaneous techniques of the present invention.
Embodiment
The present invention is described in further detail with embodiment below in conjunction with the accompanying drawings.
As shown in figure 1, a kind of method that dual-active system is realized based on block simultaneous techniques, is comprised the following steps：
(1) the first computer room and the second computer room are provided with local cluster server, in the first computer room and the second computer room respectively
A storage server is selected, and the memory space of formed objects is distributed in storage server, is driven by a block device
It is dynamic, and the space for respectively distributing them generates block device, they are made by mirror image each other by block device simultaneous techniques
Two pieces of quorum disks；
(2) two pieces of quorum disks convey cluster server of the data to local computer room by iscsi technologies, make the two mutual
Quorum disk for mirror image is the shared quorum disk of cluster of the first computer room and the second computer room；
(3) when the first computer room or the second computer room receive request write-in quorum disk, data only write local arbitration magnetic
In disk, then the request of data of write-in is issued by network the quorum disk of another computer room, make two quorum disk data
Content is consistent；
(4) there are abnormal conditions in the first computer room or the second computer room, another normal computer room can access normal computer room
Quorum disk and normal computer room shared quorum disk, the quorum disk having access to exceedes half, according to oracle database
The rule of cluster is normal externally to provide service.
When two computer room synchronizing networks used in this two pieces each other quorum disk of mirror image go wrong, by one of them
The quorum disk of computer room carries out being set to the state that can not be read and write.
Distribute certain space by two storage servers in different computer rooms, by Block Device Driver by the two
Space generates block device respectively, is then only conveyed to this respectively using the two block devices as the quorum disk in Oracle RAC
The RAC clustered node servers of ground computer room, when a block device goes wrong, another piece will not be affected and still may be used
To be operated storage data and back up, so another computer room collection can be also ensured in the case where a computer room powers off
Group also has n+1 blocks quorum disk to access so as to ensure that Oracle RAC can work on, and ensure that the continuity of work.
Embodiment 1
Dual-active system such as Fig. 1 frameworks, two computer rooms store 6 servers altogether, wherein two as two nodes
Oracle clusters (NODE1 and NODE2).Oracle cluster regulation quorum disk is odd number block (2n+1) and available arbitration
Number of disks could normal work when needing to be more than n.So 4 quorum disks can be deposited in other four storage servers, and
And vote2 and vote3 is made to the state for turning into mirror image each other, that is, node1 and node2 think what is each had access to
Vote2 and vote3 is same quorum disk, and oracle clusters are believed that current only 3 pieces to oracle in this state
Quorum disk, it can thus meet the basic demand of oracle clusters.
When computer room power-off occurs for A computer rooms, then all servers can all power off in A computer rooms, it is impossible to normal use.
At this moment vote1 and vote2 can not play arbitration effect, then this when B computer rooms NODE2 calculate nodes, be still able to visit
Two pieces of quorum disks (vote3 and vote4) are asked, half quorum disk is had more than and can use, so B computer rooms will not be because of A computer rooms
Power-off and be affected, so as to realize real dual-active.
In a word, presently preferred embodiments of the present invention, all equalizations made according to scope of the present invention patent be the foregoing is only
Change and modification, it should all belong to the covering scope of patent of the present invention.
Claims (2)
- A kind of 1. method that dual-active system is realized based on block simultaneous techniques, it is characterised in that comprise the following steps：(1) the first computer room and the second computer room are provided with local cluster server, are selected respectively in the first computer room and the second computer room One storage server, and in storage server distribute formed objects memory space, by a Block Device Driver, and And the space for respectively distributing them generates block device, they are made into mirror image each other by block device simultaneous techniques two pieces are secondary Cut out disk；(2) two pieces of quorum disks convey cluster server of the data to local computer room by iscsi technologies, make the two mirrors each other The quorum disk of picture is the shared quorum disk of cluster of the first computer room and the second computer room；(3) when the first computer room or the second computer room receive request write-in quorum disk, data are only write in local quorum disk, Then the request of data of write-in is issued by network the quorum disk of another computer room, protects two quorum disk data contents Hold consistent；(4) there are abnormal conditions in the first computer room or the second computer room, another normal computer room can access the secondary of normal computer room The shared quorum disk of disk and normal computer room is cut out, the quorum disk having access to exceedes half, according to oracle database cluster Rule, it is normal that service is externally provided.
- A kind of 2. method that dual-active system is realized based on block simultaneous techniques according to claim 1, it is characterised in that：Step (1) in, when two computer room synchronizing networks used in this two pieces each other quorum disk of mirror image go wrong, by one of machine The quorum disk in room carries out being set to the state that can not be read and write.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108647117A (en) * | 2018-04-26 | 2018-10-12 | 郑州云海信息技术有限公司 | A kind of method of data backup, main system, equipment and computer readable storage medium |
| CN109947601A (en) * | 2018-11-21 | 2019-06-28 | 北京中科同向信息技术有限公司 | A kind of dual-active storage system |
| CN113094354A (en) * | 2021-04-08 | 2021-07-09 | 浪潮商用机器有限公司 | Database architecture method and device, database all-in-one machine and storage medium |
| CN115794499A (en) * | 2023-02-03 | 2023-03-14 | 创云融达信息技术(天津)股份有限公司 | Method and system for double-live replication of data among distributed block storage clusters |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8060776B1 (en) * | 2003-03-21 | 2011-11-15 | Netapp, Inc. | Mirror split brain avoidance |
| CN104168323A (en) * | 2013-08-26 | 2014-11-26 | 天津书生投资有限公司 | Cloud service system and method |
| CN105843713A (en) * | 2016-04-01 | 2016-08-10 | 杭州沃趣网络科技有限公司 | Method for realizing Oracle RAC (real application cluster) through shared-nothing storage of dual system |
-
2017
- 2017-07-24 CN CN201710607424.8A patent/CN107577564A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8060776B1 (en) * | 2003-03-21 | 2011-11-15 | Netapp, Inc. | Mirror split brain avoidance |
| CN104168323A (en) * | 2013-08-26 | 2014-11-26 | 天津书生投资有限公司 | Cloud service system and method |
| CN105843713A (en) * | 2016-04-01 | 2016-08-10 | 杭州沃趣网络科技有限公司 | Method for realizing Oracle RAC (real application cluster) through shared-nothing storage of dual system |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108647117A (en) * | 2018-04-26 | 2018-10-12 | 郑州云海信息技术有限公司 | A kind of method of data backup, main system, equipment and computer readable storage medium |
| CN109947601A (en) * | 2018-11-21 | 2019-06-28 | 北京中科同向信息技术有限公司 | A kind of dual-active storage system |
| CN113094354A (en) * | 2021-04-08 | 2021-07-09 | 浪潮商用机器有限公司 | Database architecture method and device, database all-in-one machine and storage medium |
| CN115794499A (en) * | 2023-02-03 | 2023-03-14 | 创云融达信息技术(天津)股份有限公司 | Method and system for double-live replication of data among distributed block storage clusters |
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Application publication date: 20180112 |