CN109981767A - HANA data bank access method, device, system, equipment and storage medium - Google Patents
HANA data bank access method, device, system, equipment and storage medium Download PDFInfo
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- CN109981767A CN109981767A CN201910212843.0A CN201910212843A CN109981767A CN 109981767 A CN109981767 A CN 109981767A CN 201910212843 A CN201910212843 A CN 201910212843A CN 109981767 A CN109981767 A CN 109981767A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/10—Protocols in which an application is distributed across nodes in the network
- H04L67/1001—Protocols in which an application is distributed across nodes in the network for accessing one among a plurality of replicated servers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/10—Protocols in which an application is distributed across nodes in the network
- H04L67/1001—Protocols in which an application is distributed across nodes in the network for accessing one among a plurality of replicated servers
- H04L67/1004—Server selection for load balancing
- H04L67/1008—Server selection for load balancing based on parameters of servers, e.g. available memory or workload
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/10—Protocols in which an application is distributed across nodes in the network
- H04L67/1001—Protocols in which an application is distributed across nodes in the network for accessing one among a plurality of replicated servers
- H04L67/1034—Reaction to server failures by a load balancer
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- Computer Networks & Wireless Communication (AREA)
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- Computer Hardware Design (AREA)
- General Engineering & Computer Science (AREA)
- Information Retrieval, Db Structures And Fs Structures Therefor (AREA)
Abstract
The invention discloses a kind of HANA database server access methods, in this programme, client is when accessing HANA database server, server to be operated can be directly determined by client, to execute corresponding access operation, it does not need through management node to each by pipe node distribution request, to simplify the configuration of HANA server end, reduces the deployment and maintenance cost of HANA server；Also, since this programme does not need management node, there is no the switching times occurred due to handover management node, improve the system availability of whole system；In expansion service device quantity, limited since there is no the performance of management node itself, therefore the server in this programme can use more HANA database servers simultaneously, reduce the bottleneck of Longitudinal Extension.Invention additionally discloses a kind of HANA database server access mechanism, system, equipment and storage mediums, are equally able to achieve above-mentioned technical effect.
Description
Technical field
The present invention relates to database access technology fields, access more specifically to a kind of HANA database server
Method, apparatus, system, equipment and computer readable storage medium.
Background technique
Currently, HANA (High-Performance Analytic Appliance, high-performance analytical equipment) database takes
Device cluster topology be engaged in referring to Fig. 1, multiple HANA database servers form a cluster, wherein a server is Master section
Point (management node), in addition other nodes are Slave node (by pipe node).Client access request is connect by Master node
Enter, then there is Master node to distribute request of data to a Slave node, visitor finally will be issued after data summarization by Master node
Family end.When realizing data access through the above scheme, have the drawback that
1. arrangements are complicated, it is necessary to be implemented by the SAP BASIS (system O&M supervisor) of profession；
2.Master node is as unique Ingress node, once breaking down, service switching time is too long；
3. being limited by Master node performance itself, manageable Slave node has certain quantitative requirement；
4. the data transmission from Master node to client is due to single thread limitation, transmission efficiency is low.
Therefore, the overall performance for how promoting HANA database server cluster is that those skilled in the art need to solve
The problem of.
Summary of the invention
The purpose of the present invention is to provide a kind of HANA database server access method, device, system, equipment and calculating
Machine readable storage medium storing program for executing, to realize the overall performance for promoting HANA database server cluster.
To achieve the above object, the embodiment of the invention provides following technical solutions:
A kind of HANA database server access method is applied to client, which comprises
Determine the access operation instruction of access HANA database server；
It is instructed according to the access operation, determines HANA database service to be operated corresponding with access operation instruction
Device；
Corresponding access operation is executed to the HANA database server to be operated.
Wherein, before the access operation instruction of the determining access HANA database server, further includes:
It is determining and every according to the quantity of HANA database server and the weighted value of each HANA database server
The corresponding slot position number range of a server.
Wherein, described to be instructed according to the access operation, determine to be operated HANA corresponding with access operation instruction
Database server, comprising:
The Major key to operation data is determined from access operation instruction；
Using the Major key and slot position total quantity, slot position number corresponding with access operation instruction is determined；
Using slot position number range corresponding with each server, to be operated HANA corresponding with the slot position number is determined
Database server.
Wherein, the access operation instruction includes: during insertion operation instructs, modification operational order, delete operation instruct
Any one.
Wherein, described to be instructed according to the access operation if access operation instruction is that inquiry operation instructs, it determines
HANA database server to be operated corresponding with access operation instruction, comprising:
It regard each HANA database server as HANA database server to be operated.
Wherein, corresponding access operation is executed to the HANA database server to be operated, comprising:
Inquiry operation instruction is sent to each HANA database server, and is received each by parallel mode
The query result of HANA database server；
Each query result is integrated, as final query result.
A kind of HANA database server access mechanism, is applied to client, and described device includes:
Determining module is instructed, for determining the access operation instruction of access HANA database server；
Server determining module, for being instructed according to the access operation, determination is corresponding with access operation instruction
HANA database server to be operated；
Operation executing module, for executing corresponding access operation to the HANA database server to be operated.
A kind of HANA database server access system, comprising: client and at least two HANA database servers
Server cluster；
The client is for determining the access operation instruction of access HANA database server；According to the access operation
Instruction determines HANA database server to be operated corresponding with access operation instruction；To the HANA data to be operated
Library server executes corresponding access operation.
A kind of HANA database server access equipment, comprising:
Memory, for storing computer program；
Processor realizes such as above-mentioned HANA database server access mechanism side when for executing the computer program
The step of method.
A kind of computer readable storage medium is stored with computer program on the computer readable storage medium, described
It realizes when computer program is executed by processor such as the step of above-mentioned HANA database server access mechanism method.
By above scheme it is found that a kind of HANA database server access method provided in an embodiment of the present invention, application
In client, which comprises determine the access operation instruction of access HANA database server；According to the access operation
Instruction determines HANA database server to be operated corresponding with access operation instruction；Treat operation HANA database clothes
Business device executes corresponding access operation.
As it can be seen that in the present solution, client when accessing HANA database server, can be directly determined by client to
The server of operation is not needed through management node to each with executing corresponding access operation by pipe node distribution request, from
And the configuration of HANA server end is simplified, reduce the deployment and maintenance cost of HANA server；Also, not due to this programme
Management node is needed, therefore there is no the switching time occurred due to handover management node, the system for improving whole system
Availability；In expansion service device quantity, limited since there is no the performance of management node itself, therefore the service in this programme
Device can use more HANA database servers simultaneously, reduce the bottleneck of Longitudinal Extension.
The invention also discloses a kind of HANA database server access mechanism, system, equipment and computer-readable storages
Medium is equally able to achieve above-mentioned technical effect.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is traditional HANA database server cluster structural schematic diagram；
Fig. 2 is a kind of HANA database server access method flow diagram disclosed by the embodiments of the present invention；
Fig. 3 is a kind of system structure diagram disclosed by the embodiments of the present invention；；
Fig. 4 is another HANA database server access method flow diagram disclosed by the embodiments of the present invention；
Fig. 5 is another system structure diagram disclosed by the embodiments of the present invention；
Fig. 6 is another HANA database server access method flow diagram disclosed by the embodiments of the present invention；
Fig. 7 is a kind of HANA database server access mechanism structural schematic diagram disclosed by the embodiments of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
The embodiment of the invention discloses a kind of HANA database server access method, device, system, equipment and computers
Readable storage medium storing program for executing, to realize the overall performance for promoting HANA database server cluster.
Referring to fig. 2, a kind of HANA database server access method provided in an embodiment of the present invention is applied to client,
The described method includes:
S101, the access operation instruction for determining access HANA database server；
In the present solution, the executing subject of the server access method is client, that is to say, that exist in client and drive
Dynamic program.The driver can connect multiple mutually independent HANA database instances simultaneously.Each HANA database instance
It is standalone version HANA, to each other without any dependence and coupling.It is a kind of system provided in an embodiment of the present invention referring to Fig. 3
Structural schematic diagram；As seen in Figure 3, in the present embodiment, without management node with by point of pipe node, client is direct
It is connected with each HANA node.When client wants access to any one database, the driver in client detects this
After access operation instruction, S102-S103 can be continued to execute, so that client directly accesses server,
S102, it is instructed according to the access operation, determines HANA data to be operated corresponding with access operation instruction
Library server；
In the present embodiment, it is instructed according to the access operation, can determine HANA database server to be operated；It needs
Bright, the instruction of access operation in this programme can instruct for random access, such as: insertion operation instruction, modification operational order,
Delete operation instruction or inquiry operation instruction can determine different HANA database clothes to be operated according to the difference of instruction
Business device.
S103, corresponding access operation is executed to the HANA database server to be operated.
It is understood that due to access operation instruction difference, then the access operation executed without, such as: if
Access operation instruction is that insertion operation instructs, then when executing the access operation, the data that will be inserted into just is needed to be inserted into wait grasp
Make in HANA database server, if access operation instruction just needs when executing the access operation for modification operational order
The corresponding data treated in operation HANA database server is modified, and is not limited access operation in this programme
Fixed, those skilled in the art can be adaptively adjusted according to the difference that access operation instructs.
It should be noted that, although most important application scenarios are insertion scene in the actual use of HANA database
With inquiry scene, but the robustness in order to guarantee driver, driver be also required to provide delete, modification, inquiry data
Function.Also, for the driver medium in this programme, it is possible to provide AIX, HPUX, SOLARIS, Redhat Linux, SUSE
The several operation systems version such as Linux, Windows.According to the application software of different platform, it is mounted on use identical with application software
Under the authorization of family permission；Further, this programme does not need to carry out any configuration for HANA server end；In addition, the drive
Dynamic program may include JDBC, ODBC, C&C++, Python, RestFULL api interface.
It in summary it can be seen, this client method that directly accesses server that this programme proposes, and in the related technology
It is compared, is had the advantages that by the method for pipe node distribution request by management node
1, the configuration for simplifying HANA server end reduces the deployment and maintenance cost of HANA server；
2, due to the switching time without Master node, the system availability of whole system is improved；
3, client can use more HANA database instances simultaneously, reduce the bottleneck of Longitudinal Extension；
4, since all HANA database nodes can be operated simultaneously, the bandwidth of data access is referred to parallel,
Improve overall data access efficiency.
Therefore, the server access method provided by this programme, can reduce the complexity of server end scheme, thus
Lifting system overall performance and system reliability.
Referring to fig. 4, a kind of HANA database server access method provided in an embodiment of the present invention is applied to client,
The described method includes:
S201, according to the quantity of HANA database server and the weighted value of each HANA database server, determine
Slot position number range corresponding with each server；
Specifically, in the present embodiment, when client driver initialization, client driver will be according to HANA
The weighted value of the quantity of database server and each HANA database server determines Kazakhstan corresponding with each server
Uncommon value, which is slot position number range.In the present embodiment, for being made of the scene of cluster three servers into
Row explanation.
In the cluster, presence server 1, server 2, server 3 these three servers, corresponding, server 1, clothes
Device 2, the corresponding weight of server 3 of being engaged in are 1,2,1；Specifically, the weight of server and the performance of server are related, server
Performance it is higher, then corresponding weight is bigger；Therefore, because the performance of server 2 is just higher than server 1 and server 3, so
The weight of server 2 is just higher than the weight of server 1 and server 3.
Further, 16384 slots (slot) are distributed for cluster, and according to the quantity of server and the weight of every server
These slot positions are mapped to every server.In client initialization, client is that each server distributes slot mapping pass
It is as follows:
Server 1: weight=1 slot position number range: 0~4093；
Server 2: weight=2 slot position number ranges: 4094~12277；
Server 3: weight=1 slot position number range: 12278~16383；
S202, the access operation instruction for determining access HANA database server；Wherein, access operation instruction includes: slotting
Enter operational order, modification operational order, delete operation instruction in any one；
It is understood that in the present embodiment, the entrained Major key of main and access operation instruction come determine to
The HANA database server of operation, therefore, access target are specific, so in the present embodiment, access operation instruction is
Insertion operation instruction, modification operational order, delete operation instruction in any one, include inquiry operation instruct because
Inquiry instruction needs obtain final query result from different servers, and access target is simultaneously not fixed.
S203, the determining Major key to operation data from access operation instruction；
S204, the Major key and slot position total quantity, determining slot position number corresponding with access operation instruction are utilized；
S205, using slot position number range corresponding with each server, determination is corresponding wait grasp with the slot position number
Make HANA database server；
It should be noted that when client is instructed to HANA database instance pocket transmission access operation, client driving
Program will obtain cluster slot position corresponding to this data by hash algorithm using the major key Key of data in instruction first,
Calculation method is as follows:
Slot_number=crc16 (key) %16384
Wherein, slot_number is slot position number, and key is Major key, and 16384 be slot position total quantity, and crc16 is 16
Cyclic redundancy check and function.Slot position number corresponding with access operation instruction can be obtained by above-mentioned formula, by this
The slot position number range of operation number and each server can determine HANA database server to be operated, and to determination
HANA database server to be operated, continue to execute corresponding access operation.
S206, corresponding access operation is executed to the HANA database server to be operated.
Specifically, in the present embodiment, if access operation is INSERT insertion operation, client driver first will
It is as follows that the major key of the data to be inserted by hash algorithm obtains cluster slot position, calculation method corresponding to this data: slot_
Number=crc16 (key) %16384.After obtaining slot number code by above-mentioned function, data can be inserted into according to slot position number
Into corresponding database server.
If client is operated to HANA database instance cluster initiation access operation for UPDATE modification, client is driven
It is dynamic that the corresponding slot position number of this data is calculated according to data major key first, corresponding service is determined according to the slot position number
Device, and this data is updated on that server.
If the access operation that client is initiated to HANA database instance cluster is DELETE delete operation, client
Driving calculates the corresponding slot position number of this data according to data major key first, determines corresponding service according to the slot position number
Device, and this data is deleted on that server.
It, will be from client to whole it should be noted that when server cluster is due to dilatation increase in demand number of servers
A cluster initiates rehash request, and the data in database are carried out data rebalancing according to newest server distribution, makes
Data and hash algorithm rebalancing in database.Such as: addition server 4, weight 1, at this moment client is each service
It is as follows that device distributes slot mapping relations:
Server 1: weight=1 slot position number range: 0~3277；
Server 2: weight=2 slot position number ranges: 3278~9832；
Server 3: weight=1 slot position number range: 9832~13109；
Server 4: weight=1 slot position number range: 13109~16383.
As can be seen that client can be according to this reality after the corresponding slot position number range of each server is adjusted
Scheme described in example is applied, slot position number is obtained according to Major key, so that it is determined that server to be operated.And in the present embodiment
In, it is possible to provide the highly reliable design about HANA server instance, that is to say, that can be each individual HANA database
Example implements the highly reliable scheme of HA, is another kind system structure diagram disclosed in the present embodiment referring to Fig. 5；It can be with by Fig. 5
Find out, each server node has the node of a backup, and the variation of all data of each server will be synchronized to standby
Part node greatly shortens the industry as caused by the damage of Service Instance node to carry out node switching in time in node failure
Business pauses.
It in summary it can be seen, this programme function extending transversely that will control database is moved down from the management node end of server
It is completed to client.And guarantee the correctness of data storage location by hash algorithm.To reduce server end deployment
Complexity improves system reliability, and improves data loading efficiency.
Referring to Fig. 6, a kind of HANA database server access method provided in an embodiment of the present invention is applied to client,
The described method includes:
S301, the access operation instruction for determining access HANA database server；
If S302, the access operation instruction be inquiry operation instruct, by each HANA database server be used as to
Operate HANA database server；
S303, inquiry operation instruction is sent to each HANA database server, and is received by parallel mode
The query result of each HANA database server；
S304, each query result is integrated, as final query result.
In the present embodiment, if client initiates access operation to HANA database instance cluster as SELECT query behaviour
When making, client driver issues same inquiry instruction to Servers-all first, and by parallel mode from all
Query result is received in HANA server instance.And query result is integrated in client, and be supplied to End-Customer and answer
Use program.
It can be seen that this programme by above-mentioned any embodiment to complete by client driver to multiple independent HANA
Database instance is operated, and forms unified data integrity, realizes the extending transversely of HANA database by client.
Also, in client driver initialization, cryptographic Hash is defined for each HANA database instance, and at it to HANA number
When implementing data manipulation according to library example, cryptographic Hash is calculated by data major key, by the cryptographic Hash being calculated and HANA database
The cryptographic Hash of example compares, and writes data into or updates into corresponding database instance, passes through Hash to realize
Algorithm is realized to the mark of independent HANA database instance, guarantees the correctness of data storage location.
Access mechanism provided in an embodiment of the present invention and system are introduced below, access mechanism described below and are
System can be cross-referenced with above-described access method.
Referring to Fig. 7, a kind of HANA database server access mechanism provided in an embodiment of the present invention is applied to client,
Described device includes:
Determining module 110 is instructed, for determining the access operation instruction of access HANA database server；
Server determining module 120, for being instructed according to the access operation, determination is corresponding with access operation instruction
HANA database server to be operated；
Operation executing module 130, for executing corresponding access operation to the HANA database server to be operated.
Wherein, this programme further include:
Slot position number determining module, for according to the quantity of HANA database server and each HANA database clothes
The weighted value of business device, determines slot position number range corresponding with each server.
Wherein, the server determining module includes:
Major key determination unit, for determining the Major key to operation data from access operation instruction；
Slot position number determination unit, for utilizing the Major key and slot position total quantity, determination refers to the access operation
Enable corresponding slot position number；
First server determination unit, for utilizing slot position number range corresponding with each server, it is determining with it is described
The corresponding HANA database server to be operated of slot position number.
Wherein, the access operation instruction includes: during insertion operation instructs, modification operational order, delete operation instruct
Any one.
Wherein, if access operation instruction is that inquiry operation instructs, the server determining module includes:
Second server determination unit, for taking each HANA database server as HANA database to be operated
Business device.
Wherein, the operation executing module includes:
Instruction sending unit for inquiry operation instruction to be sent to each HANA database server, and passes through
Parallel mode receives the query result of each HANA database server；
Query result determination unit, for integrating each query result, as final query result.
Referring to Fig. 3, a kind of HANA database server access system provided in an embodiment of the present invention, comprising: client 100
With the server cluster 200 of at least two HANA database servers；
The client is for determining the access operation instruction of access HANA database server；According to the access operation
Instruction determines HANA database server to be operated corresponding with access operation instruction；To the HANA data to be operated
Library server executes corresponding access operation.
A kind of HANA database server access equipment that the embodiment of the present invention also provides, comprising:
Memory, for storing computer program；
Processor realizes the HANA database clothes as described in above method embodiment when for executing the computer program
The step of device access mechanism method of being engaged in.
The embodiment of the invention also discloses a kind of computer readable storage medium, deposited on the computer readable storage medium
Computer program is contained, the HANA data as described in above method embodiment are realized when the computer program is executed by processor
The step of library server access installation method.
Wherein, the storage medium may include: USB flash disk, mobile hard disk, read-only memory (Read-Only Memory,
ROM), random access memory (Random Access Memory, RAM), magnetic or disk etc. are various can store program
The medium of code.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other
The difference of embodiment, the same or similar parts in each embodiment may refer to each other.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest scope of cause.
Claims (10)
1. a kind of HANA database server access method, which is characterized in that be applied to client, which comprises
Determine the access operation instruction of access HANA database server；
It is instructed according to the access operation, determines HANA database server to be operated corresponding with access operation instruction；
Corresponding access operation is executed to the HANA database server to be operated.
2. HANA database server access method according to claim 1, which is characterized in that the determining access HANA
Before the access operation instruction of database server, further includes:
According to the quantity of HANA database server and the weighted value of each HANA database server, determining and each clothes
The corresponding slot position number range of business device.
3. HANA database server access method according to claim 2, which is characterized in that described according to the access
Operational order determines HANA database server to be operated corresponding with access operation instruction, comprising:
The Major key to operation data is determined from access operation instruction；
Using the Major key and slot position total quantity, slot position number corresponding with access operation instruction is determined；
Using slot position number range corresponding with each server, HANA data to be operated corresponding with the slot position number are determined
Library server.
4. HANA database server access method as claimed in any of claims 1 to 3, which is characterized in that institute
Stating access operation instruction includes: any one during insertion operation instructs, modification operational order, delete operation instruct.
5. HANA database server access method according to claim 1, which is characterized in that if the access operation refers to
Enabling is that inquiry operation instructs, then described to be instructed according to the access operation, determination is corresponding wait grasp with access operation instruction
Make HANA database server, comprising:
It regard each HANA database server as HANA database server to be operated.
6. HANA database server access method according to claim 5, which is characterized in that the HANA to be operated
Database server executes corresponding access operation, comprising:
Inquiry operation instruction is sent to each HANA database server, and each HANA number is received by parallel mode
According to the query result of library server；
Each query result is integrated, as final query result.
7. a kind of HANA database server access mechanism, which is characterized in that be applied to client, described device includes:
Determining module is instructed, for determining the access operation instruction of access HANA database server；
Server determining module, for being instructed according to the access operation, determination is corresponding wait grasp with access operation instruction
Make HANA database server；
Operation executing module, for executing corresponding access operation to the HANA database server to be operated.
8. a kind of HANA database server accesses system characterized by comprising client and at least two HANA databases
The server cluster of server；
The client is for determining the access operation instruction of access HANA database server；Referred to according to the access operation
It enables, determines HANA database server to be operated corresponding with access operation instruction；To the HANA database to be operated
Server executes corresponding access operation.
9. a kind of HANA database server access equipment characterized by comprising
Memory, for storing computer program；
Processor realizes that HANA database as claimed in any one of claims 1 to 6 such as takes when for executing the computer program
The step of device access mechanism method of being engaged in.
10. a kind of computer readable storage medium, which is characterized in that be stored with computer on the computer readable storage medium
Program realizes such as HANA database service as claimed in any one of claims 1 to 6 when the computer program is executed by processor
The step of device access mechanism method.
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| CN111240950A (en) * | 2020-01-19 | 2020-06-05 | 苏州浪潮智能科技有限公司 | SAP HANA performance evaluation method and SAP HANA performance evaluation equipment |
| CN112738207A (en) * | 2020-12-25 | 2021-04-30 | 青岛海尔科技有限公司 | Keyword data transmission method and device, storage medium and electronic device |
| CN113312395A (en) * | 2021-06-23 | 2021-08-27 | 中国农业银行股份有限公司 | Data access method and equipment |
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