CN109344015A - A kind of database service prevents the method and system of double host nodes using HA - Google Patents
A kind of database service prevents the method and system of double host nodes using HA Download PDFInfo
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- CN109344015A CN109344015A CN201811177044.6A CN201811177044A CN109344015A CN 109344015 A CN109344015 A CN 109344015A CN 201811177044 A CN201811177044 A CN 201811177044A CN 109344015 A CN109344015 A CN 109344015A
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- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000012544 monitoring process Methods 0.000 claims abstract description 9
- 230000009977 dual effect Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 3
- 230000002265 prevention Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008447 perception Effects 0.000 description 1
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
- G06F11/16—Error detection or correction of the data by redundancy in hardware
- G06F11/20—Error detection or correction of the data by redundancy in hardware using active fault-masking, e.g. by switching out faulty elements or by switching in spare elements
- G06F11/202—Error detection or correction of the data by redundancy in hardware using active fault-masking, e.g. by switching out faulty elements or by switching in spare elements where processing functionality is redundant
- G06F11/2046—Error detection or correction of the data by redundancy in hardware using active fault-masking, e.g. by switching out faulty elements or by switching in spare elements where processing functionality is redundant where the redundant components share persistent storage
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
- G06F11/16—Error detection or correction of the data by redundancy in hardware
- G06F11/20—Error detection or correction of the data by redundancy in hardware using active fault-masking, e.g. by switching out faulty elements or by switching in spare elements
- G06F11/202—Error detection or correction of the data by redundancy in hardware using active fault-masking, e.g. by switching out faulty elements or by switching in spare elements where processing functionality is redundant
- G06F11/2023—Failover techniques
- G06F11/2028—Failover techniques eliminating a faulty processor or activating a spare
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2201/00—Indexing scheme relating to error detection, to error correction, and to monitoring
- G06F2201/80—Database-specific techniques
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2201/00—Indexing scheme relating to error detection, to error correction, and to monitoring
- G06F2201/82—Solving problems relating to consistency
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Abstract
A kind of method that database service prevents double host nodes using HA, it include: S1, in two-shipper HA group system, local listening port is set in the database service on host and standby host respectively, before database instance starting, the local listening port is first listened to, the connection for being directed to the local listening port for receiving other database instances；S2, in two-shipper HA group system, respectively in the database service on host and standby host be arranged opposite end server connection IP address；S3, in two-shipper HA group system, when the resource that HA cluster resource manager services in log-on data library, what database service first listened to be locally located is used to prevent double main listening ports, then passes through the opposite end server ip of setting, the port of the database service monitoring of peer end of the connection；S4, the start-up course for executing local data base example execute other start-up courses in HA group system, until two-shipper HA group system starts successfully.
Description
Technical field
The present invention relates to server cluster technical fields more particularly to a kind of database service to prevent double host nodes using HA
Method and system.
Background technique
High-availability cluster (High Availability Cluster) is a kind of server cluster technology, is raising system
Service availability ensures the successional effective solution of operation system.In the two-shipper HA group system of principal and subordinate's working method,
Host externally provides service, and standby host is then in monitoring preparation state；When host since system hardware or software error cause to take
When being engaged in unavailable, standby host can automatically detect failure in the case where not needing manual intervention, and carry out service switching automatically, adapter tube
All work of host, it is automatic to guarantee that systems stay externally provides service.In order to ensure the data consistency of standby machine, two-shipper HA
System carries out data access by way of shared storage.When host externally provides service, storage system carry is in host
On, and standby host is then without carry.In failover, group system realize automatically storage service stopping, transfer and again
Starting.
The High Availabitity of service is realized by cluster resource manager in HA cluster internal.It include VIP, clothes in HA cluster
Business, xegregating unit and file system etc. are standby to be defined as resource, the state of each resource of cluster resource manager monitoring statisticss,
And determine the stopping, transfer and starting of resource.When host externally provides service, the resource that cluster internal defines operates in master
On machine, after host breaks down, cluster resource manager stops the resource on host, and starts the resource on standby host, realizes money
Source transfer, makes standby host continue external offer service.Database service, can also be in HA group system as a kind of system service
It is managed as a kind of resource, provides the High Availabitity of database service so as to realize using HA group system.?
When using HA colony system deployment High Availabitity database service, the data file of database is stored on shared memory systems, number
It is operated on cluster server according to library example.
By HA colony system deployment High Availabitity database service, the height that server level realizes database service can
With, it avoids Single Point of Faliure and causes the unavailable of database service, meanwhile, group system as a whole proposes upper layer application
For network and service is calculated, the realization details of first floor system is shielded to application, what it is using perception is then a single system,
The characteristics of group system will not dramatically increase the complexity of upper layer application, be provided simultaneously with High Availabitity, high extension, therefore the system tray
Structure has significant application advantage compared to one-of-a-kind system.At present when using HA software deployment database high-availability cluster, due to
Cluster internal is communicated by heartbeat mechanism with node, detect and judge node failure etc., by group system heartbeat machine
There is the possibility of malfunctioning node erroneous judgement sometimes, lead to double masters occur in the influence of reliability processed and HA software inhouse BUG factor
The problem of node.For database high-availability cluster, the data file of database is deposited in shared storage, and is only permitted
Perhaps a database instance carries out data access.When there are double host nodes, it will result in standby machine database instance while visiting
It asks same part data file, the mortality of data file is caused to damage.
Summary of the invention
In view of this, the present invention proposes that a kind of database service prevents the method and system of double host nodes using HA.
A kind of method that database service prevents double host nodes using HA comprising following steps:
S1, in two-shipper HA group system, be arranged in the database service on host and standby host local monitor end respectively
Mouthful, before database instance starting, the local listening port is first listened to, for receiving other database instances for the local
The connection of listening port；
S2, in two-shipper HA group system, respectively in the database service on host and standby host be arranged opposite end server
Connection IP address, before the starting of local data base example, first by the monitoring end of the IP address peer end of the connection server
Mouthful；
S3, in two-shipper HA group system, when the resource that HA cluster resource manager services in log-on data library, database
What service first listened to be locally located is used to prevent double main listening ports, then by the opposite end server ip of setting, connects
The port that the database service of opposite end is monitored；If successful connection thens follow the steps S4；Otherwise, database example is terminated
Start-up course；
S4, the start-up course for executing local data base example execute other start-up courses in HA group system, until double
Machine HA group system starts successfully.
In the method that database service of the present invention prevents double host nodes using HA,
Host and standby host use shared storage guarantee data consistency.
In the method that database service of the present invention prevents double host nodes using HA,
Two-shipper HA group system failure is monitored by heartbeat mechanism and detected to host and standby host.
The present invention also provides a kind of database services to use the system of the double host nodes of HA prevention comprising such as lower unit:
Port configuration unit is used in two-shipper HA group system, respectively in the database service on host and standby host
Local listening port is set and the local listening port is first listened to, for receiving other databases before database instance starting
Example is directed to the connection of the local listening port；
Address configuration unit is used in two-shipper HA group system, respectively in the database service on host and standby host
The connection IP address of opposite end server is set, before the starting of local data base example, passes through the IP address peer end of the connection first
The listening port of server；
Monitoring unit, for the money that in two-shipper HA group system, HA cluster resource manager services in log-on data library
When source, what database service first listened to be locally located is used to prevent double main listening ports, is then taken by the opposite end of setting
Be engaged in device IP, the port that the database service of peer end of the connection is monitored；If successful connection executes start unit；Otherwise, this is terminated
The start-up course of database instance；
Start unit executes other startings in HA group system for executing the start-up course of local data base example
Process, until two-shipper HA group system starts successfully.
In the system that database service of the present invention prevents double host nodes using HA,
Host and standby host use shared storage guarantee data consistency.
In the system that database service of the present invention prevents double host nodes using HA,
Two-shipper HA group system failure is monitored by heartbeat mechanism and detected to host and standby host.
Implement method and system and prior art phase that database service provided by the invention prevents double host nodes using HA
Than having the advantages that
(1) after host is serviced according to normal flow log-on data library and externally provides service, since HA software fault is examined
The unreliability of survey causes host to judge failure by accident, and at this time HA software carries out service switching automatically, starts the database on standby host
Resource.
(2) when standby host database starts, host IP address is used first, host listening port is connected, due to host data
Library example has been started up, and can return to successful connection information at this time.
(3) automatic to terminate native database example Booting sequence after standby host database service receives successful connection information, it keeps away
Exempt from double masters, protection database datafile is not damaged.
Detailed description of the invention
Fig. 1 is HA Dual Computers Cluster System schematic diagram；
Fig. 2 is High Availabitity database service Booting sequence figure in HA Dual Computers Cluster System；
Fig. 3 is HA Dual Computers Cluster System starting old process figure；
Fig. 4 is that HA Dual Computers Cluster System prevents double main schematic illustrations.
Specific embodiment
As shown in Figures 1 to 4, a kind of database service prevents the method for double host nodes using HA comprising following steps:
S1, in two-shipper HA group system, be arranged in the database service on host and standby host local monitor end respectively
Mouthful, before database instance starting, the local listening port is first listened to, for receiving other database instances for the local
The connection of listening port；
S2, in two-shipper HA group system, respectively in the database service on host and standby host be arranged opposite end server
Connection IP address, before the starting of local data base example, first by the monitoring end of the IP address peer end of the connection server
Mouthful；
S3, in two-shipper HA group system, when the resource that HA cluster resource manager services in log-on data library, database
What service first listened to be locally located is used to prevent double main listening ports, then by the opposite end server ip of setting, connects
The port that the database service of opposite end is monitored；If successful connection thens follow the steps S4；Otherwise, database example is terminated
Start-up course；
S4, the start-up course for executing local data base example execute other start-up courses in HA group system, until double
Machine HA group system starts successfully.
In the method that database service of the present invention prevents double host nodes using HA,
Host and standby host use shared storage guarantee data consistency.
In the method that database service of the present invention prevents double host nodes using HA,
Two-shipper HA group system failure is monitored by heartbeat mechanism and detected to host and standby host.
The present invention also provides a kind of database services to use the system of the double host nodes of HA prevention comprising such as lower unit:
Port configuration unit is used in two-shipper HA group system, respectively in the database service on host and standby host
Local listening port is set and the local listening port is first listened to, for receiving other databases before database instance starting
Example is directed to the connection of the local listening port；
Address configuration unit is used in two-shipper HA group system, respectively in the database service on host and standby host
The connection IP address of opposite end server is set, before the starting of local data base example, passes through the IP address peer end of the connection first
The listening port of server；
Monitoring unit, for the money that in two-shipper HA group system, HA cluster resource manager services in log-on data library
When source, what database service first listened to be locally located is used to prevent double main listening ports, is then taken by the opposite end of setting
Be engaged in device IP, the port that the database service of peer end of the connection is monitored；If successful connection executes start unit；Otherwise, this is terminated
The start-up course of database instance；
Start unit executes other startings in HA group system for executing the start-up course of local data base example
Process, until two-shipper HA group system starts successfully.
In the system that database service of the present invention prevents double host nodes using HA,
Host and standby host use shared storage guarantee data consistency.
In the system that database service of the present invention prevents double host nodes using HA,
Two-shipper HA group system failure is monitored by heartbeat mechanism and detected to host and standby host.
Implement method and system and prior art phase that database service provided by the invention prevents double host nodes using HA
Than having the advantages that
(1) after host is serviced according to normal flow log-on data library and externally provides service, since HA software fault is examined
The unreliability of survey causes host to judge failure by accident, and at this time HA software carries out service switching automatically, starts the database on standby host
Resource.
(2) when standby host database starts, host IP address is used first, host listening port is connected, due to host data
Library example has been started up, and can return to successful connection information at this time.
(3) automatic to terminate native database example Booting sequence after standby host database service receives successful connection information, it keeps away
Exempt from double masters, protection database datafile is not damaged.
Attached drawing 1 is HA Dual Computers Cluster System configuration diagram, wherein
Host and standby host use shared storage guarantee data consistency；Host and standby host are monitored and are examined by heartbeat mechanism
Examining system failure, to be automatically switched；Host and standby host are as unified whole externally offer service；Host externally services
When, standby host is in monitoring preparation state；
When attached drawing 2 is deployment database High Availabitity service in HA Dual Computers Cluster System, the method for the present invention log-on data is used
The flow diagram of library example.
When attached drawing 4 is deployment database High Availabitity service in HA Dual Computers Cluster System, prevented using the method for the present invention double main
Schematic illustration.In figure 4,
In step 10) two-shipper HA group system, local listening port is set in the database service in standby machine respectively,
Before database instance starting, the port is first listened to, the connection for being directed to the port for receiving other database instances.
In step 20) two-shipper HA group system, opposite end server is set in the database service in standby machine respectively
IP address is connected, before the starting of local data base example, passes through the listening port of the IP address peer end of the connection server first.
In step 30) two-shipper HA group system, when the resource that HA cluster resource manager services in log-on data library, data
What library service first listened to be locally located is used to prevent double main listening ports, then by the opposite end server ip of setting, connects
Connect the port that the database service of opposite end is monitored.If successful connection continues step 40)；Otherwise, database example is terminated
Start-up course.
Step 40) normally executes the start-up course of local data base example, other normal executed in HA group system open
Dynamic process, until two-shipper HA group system starts successfully.
With reference to the accompanying drawing 3 and attached drawing 4 illustrate that the method for the present invention prevents double main principles:
It is the old process figure that the method for the present invention is not used in attached drawing 3,
(1) after host is serviced according to normal flow log-on data library and externally provides service, since HA software fault is examined
The unreliability of survey causes host to judge failure by accident, and at this time HA software carries out service switching automatically, starts the database on standby host
Resource, namely will start the database service on standby host, and start successfully.
(2) since standby host database service starts successfully, while host data base service is not off, therefore is caused double
Main, at this time there is the risk of damage in database.
The method of the present invention is used in attached drawing 4, avoids double primal problems:
(1) after host is serviced according to normal flow log-on data library and externally provides service, since HA software fault is examined
The unreliability of survey causes host to judge failure by accident, and at this time HA software carries out service switching automatically, starts the database on standby host
Resource.
(2) when standby host database starts, host IP address is used first, host listening port is connected, due to host data
Library example has been started up, and can return to successful connection information at this time.
(3) automatic to terminate native database example Booting sequence after standby host database service receives successful connection information, it keeps away
Exempt from double masters, protection database datafile is not damaged.
It is understood that for those of ordinary skill in the art, can do in accordance with the technical idea of the present invention
Various other changes and modifications out, and all these changes and deformation all should belong to the protection model of the claims in the present invention
It encloses.
Claims (6)
1. a kind of method that database service prevents double host nodes using HA, which is characterized in that it includes the following steps:
S1, in two-shipper HA group system, local listening port, number are set in the database service on host and standby host respectively
Before the starting of library example, the local listening port is first listened to, is monitored for receiving other database instances for the local
The connection of port；
S2, in two-shipper HA group system, respectively in the database service on host and standby host be arranged opposite end server company
IP address is connect, before the starting of local data base example, passes through the listening port of the IP address peer end of the connection server first；
S3, in two-shipper HA group system, when the resource that HA cluster resource manager services in log-on data library, database service
First listen to be locally located is used to prevent double main listening ports, then passes through the opposite end server ip of setting, peer end of the connection
Database service monitor port；If successful connection thens follow the steps S4；Otherwise, the starting of database example is terminated
Process；
S4, the start-up course for executing local data base example execute other start-up courses in HA group system, until two-shipper HA
Group system starts successfully.
2. the method that database service as described in claim 1 prevents double host nodes using HA, which is characterized in that
Host and standby host use shared storage guarantee data consistency.
3. the method that database service as described in claim 1 prevents double host nodes using HA, which is characterized in that
Two-shipper HA group system failure is monitored by heartbeat mechanism and detected to host and standby host.
4. the system that a kind of database service prevents double host nodes using HA, which is characterized in that it includes such as lower unit:
Port configuration unit, for being arranged in the database service on host and standby host in two-shipper HA group system respectively
Local listening port first listens to the local listening port, for receiving other database instances before database instance starting
For the connection of the local listening port；
Address configuration unit, for being arranged in the database service on host and standby host in two-shipper HA group system respectively
The connection IP address of opposite end server passes through the IP address peer end of the connection service before the starting of local data base example first
The listening port of device；
Monitoring unit, in two-shipper HA group system, when the resource that HA cluster resource manager services in log-on data library,
What database service first listened to be locally located is used to prevent double main listening ports, then passes through the opposite end server of setting
IP, the port that the database service of peer end of the connection is monitored；If successful connection executes start unit；Otherwise, notebook data is terminated
The start-up course of library example；
Start unit executes other start-up courses in HA group system for executing the start-up course of local data base example,
Until two-shipper HA group system starts successfully.
5. the system that database service as claimed in claim 4 prevents double host nodes using HA, which is characterized in that
Host and standby host use shared storage guarantee data consistency.
6. the system that database service as claimed in claim 4 prevents double host nodes using HA, which is characterized in that
Two-shipper HA group system failure is monitored by heartbeat mechanism and detected to host and standby host.
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| US20080091895A1 (en) * | 2006-10-11 | 2008-04-17 | Inventec Corporation | Cache data backup method and system for computer clustering systems |
| CN101340272A (en) * | 2008-08-25 | 2009-01-07 | 中兴通讯股份有限公司 | Double machine switching method and system |
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Effective date of registration: 20230801 Address after: 16-19/F, Building C3, Future Science and Technology Building, No. 999 Gaoxin Avenue, Donghu New Technology Development Zone, Wuhan City, Hubei Province, 430206 Patentee after: Wuhan dream database Co.,Ltd. Address before: 430073 16-19 / F, building C3, future science and technology building, 999 Gaoxin Avenue, Donghu New Technology Development Zone, Wuhan City, Hubei Province Patentee before: Wuhan dream database Co.,Ltd. Patentee before: HUAZHONG University OF SCIENCE AND TECHNOLOGY |