CN107066522A - The access method and device of database - Google Patents
The access method and device of database Download PDFInfo
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- CN107066522A CN107066522A CN201710090434.9A CN201710090434A CN107066522A CN 107066522 A CN107066522 A CN 107066522A CN 201710090434 A CN201710090434 A CN 201710090434A CN 107066522 A CN107066522 A CN 107066522A
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- database
- access
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- database instance
- instance
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
- G06F16/20—Information retrieval; Database structures therefor; File system structures therefor of structured data, e.g. relational data
- G06F16/22—Indexing; Data structures therefor; Storage structures
- G06F16/2228—Indexing structures
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
- G06F16/20—Information retrieval; Database structures therefor; File system structures therefor of structured data, e.g. relational data
- G06F16/27—Replication, distribution or synchronisation of data between databases or within a distributed database system; Distributed database system architectures therefor
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F9/00—Arrangements for program control, e.g. control units
- G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
- G06F9/46—Multiprogramming arrangements
- G06F9/50—Allocation of resources, e.g. of the central processing unit [CPU]
- G06F9/5083—Techniques for rebalancing the load in a distributed system
Abstract
The invention provides a kind of access method of database and device.The access method of wherein database includes：The type for the database for needing to access is obtained, wherein being divided into multiclass according to type of service in advance for the database accessed, class database is provided with respective index；Call the type of the database with needing to access is corresponding to index；It is determined that the connection status for the database instance that index is pointed to；It is the database instance that access index is pointed to just in the connected situation in connection status.The solution of the present invention is classified the database for providing data, services according to type of service, index is separately provided per class database, so as to carry out balance dispatching in corresponding database according to type of service, on the one hand the configuration of database instance can be carried out according to type of service, on the other hand the access load balancing of same type database can be ensured, improves the efficiency for accessing database.
Description
Technical field
The present invention relates to the access method and device of database, more particularly to database.
Background technology
Database (Database) be in order to realize the set for the data that certain purpose is got up by certain regular weaves, with
The fast development of computer technology, read or write speed, availability of data, security, the autgmentability of database are faced with higher
It is required that.
Especially in the background service structure system of extensive high concurrent number, database is generally distributed setting,
Use data-base cluster.Data-base cluster needs to ensure the load balancing between database when in use.Therefore data base set
The access coordination of group is the important technology of database field.
The access method of existing data-base cluster typically has two ways, a kind of database clothes for the address that is connected
Business device, this mode can not be balanced scheduling between each server, it may appear that the access pressure of certain server is big, and another
The visit capacity of some servers is smaller；Another is, using agency's (PROXY) technology, access request balancedly to be sent to each
Server, this mode realizes the balance scheduling between server, but needs all databases to be provided with the processing mutually same trade
The ability of business, and it is abnormal if there is the connection of certain server, it may appear that the situation of loss of data.
The content of the invention
It is an object of the present invention to improve the efficiency of database access.
Especially, the invention provides a kind of access method of database, this method includes：Obtain the data for needing to access
The type in storehouse, wherein being divided into multiclass according to type of service in advance for the database accessed, is provided with respective per class database
Index；Call the type of the database with needing to access is corresponding to index；It is determined that the connection shape for the database instance that index is pointed to
State；It is the database instance that access index is pointed to just in the connected situation in connection status.
Alternatively, also include after the database instance that access index is pointed to：It is the next order of sensing by index modification
Database instance, for access next time, wherein the database instance in per class database is arranged according to setting order in advance
Row.
Alternatively, it is determined that also including after the step of indexing the connection status of the database instance pointed to：In the company of access
In the case of state is connect to disconnect, check the database that index is pointed to is most recently connected the time；The time is most recently connected apart
In the case that interval is shorter than default threshold value, attempt to reconnect the database that index is pointed to, and after reconnecting successfully, visit
Ask database instance that index points to and by index modification to point to the database instance of next order.
Alternatively, be most recently connected apart the time interval be longer than threshold value in the case of, according to setting order to need visit
The database instance of the type for the database asked is inquired about one by one, until inquiring real in the database just in connection status
Example, and the database instance that access queries go out.
Alternatively, the database instance of the type for the database for needing to access is inquired about one by one according to setting order
Afterwards, if not inquiring in just in the database instance of connection status, returned data storehouse connection failure information.
Alternatively, also include after database instance addition is added to a class database and/or is deleted：To such
Database instance in database is resequenced.
According to another aspect of the present invention, a kind of access mechanism of database is additionally provided, the device includes：Type is obtained
Modulus block, is configured to obtain the type for the database for needing to access, wherein being drawn in advance according to type of service for the database accessed
It is divided into multiclass, class database is provided with respective index；Calling module is indexed, is configured to call the database with needing to access
The corresponding index of type；State-query module, is configured to determine the connection status for the database instance that index is pointed to；Example is visited
Module is asked, it is the database instance that access index is pointed to just in the connected situation to be configured in connection status.
Alternatively, said apparatus also includes：Index modification module, is configured to what is pointed in example access modules access index
After database instance, by index modification to point to the database instance of next order, for access next time, wherein per class data
Database instance in storehouse is arranged according to setting order in advance.
Alternatively, examples detailed above access modules are configured to：In the case where accessing connection status to disconnect, index is checked
The database of sensing is most recently connected the time；Be most recently connected apart the time interval be shorter than default threshold value in the case of, taste
The database that the new join index of test mass is pointed to, and after reconnecting successfully, the database instance that access index is pointed to, and rope
Draw modified module, be configured to after the database instance that example access modules access index is pointed to, be finger by index modification
To the database instance of next order.
Alternatively example access modules are configured to：Be most recently connected apart the time interval be longer than threshold value in the case of,
The database instance of the type for the database for needing to access is inquired about one by one according to setting order, until inquiring in just
In the database instance of connection status, and the database instance that access queries go out；And the access mechanism of above-mentioned database is also wrapped
Include：Reminding module, is configured to：The database instance of the type for the database for needing to access is carried out one by one according to setting order
After inquiry, if not inquiring in just in the database instance of connection status, returned data storehouse connection failure information；And
Order module is configured to：Also include after database instance addition is added to a class database and/or is deleted：To such
Database instance in database is resequenced.
The access method and device of the database of the present invention, it will thus provide the database of data, services is carried out according to type of service
Classification, is separately provided index, so as to carry out balance dispatching, a side in corresponding database according to type of service per class database
Face can carry out the configuration of database instance according to type of service, on the other hand can ensure that the access of same type database is born
Carry balanced, improve the efficiency for accessing database.
Further, the access method and device of database of the invention, while managing the different types of database of multiclass
Example, is arranged types of databases example in advance, and the database instance for needing to access is determined using index.For database
Abnormal situation is connected, time restriction has been done to reconnecting, prevents from frequently attempting the abnormal database reality of connection in a short time
Example, reduces waste of time, improves efficiency.
Further, the access method and device of database of the invention, by carrying out classification pipe to database instance
Reason, can be added database instance respectively to each class database and delete the operation of database instance, improve data
The flexibility in storehouse.
According to the accompanying drawings to the detailed description of the specific embodiment of the invention, those skilled in the art will be brighter
Above-mentioned and other purposes, the advantages and features of the present invention.
Brief description of the drawings
Some specific embodiments of the present invention are described in detail by way of example, and not by way of limitation with reference to the accompanying drawings hereinafter.
Identical reference denotes same or similar part or part in accompanying drawing.It should be appreciated by those skilled in the art that these
What accompanying drawing was not necessarily drawn to scale.In accompanying drawing：
Fig. 1 is the schematic block diagram of the access mechanism of database according to an embodiment of the invention；
Fig. 2 is the schematic block diagram of the access mechanism of database according to another embodiment of the present invention；
Fig. 3 is the schematic diagram of the access method of database according to an embodiment of the invention；And
Fig. 4 is the schematic flow sheet of the access method of database according to another embodiment of the present invention.
Embodiment
Fig. 1 is the schematic block diagram of the access mechanism 100 of database according to an embodiment of the invention.The visit of the database
Ask that device 100 may include in general manner：Type acquisition module 110, index calling module 120, state-query module 130, example
Access modules 140.
In the present embodiment, multiclass is divided into according to type of service in advance for the database of access, per class data lab setting
There is respective index.The quantity specifically divided can be determined according to the function service of database, and phase can be completed per class database
It can include multiple database instances (instance) to independent data, services, and per class database.Database instance is
The combination of one group of background process and internal storage structure, can be operated to database.Type acquisition module 110 is configured to obtain needs
The type of the database of access.Calling module 120 is indexed, is configured to call rope corresponding with the type for the database that needs are accessed
Draw.The index is used to indicate this database instance that should be accessed.State-query module 130 is configured to determine that index is pointed to
Database instance connection status；It is just in the connected situation, to access that example access modules 140, which are configured in connection status,
Index the database instance pointed to.
The access mechanism 100 of the database is classified to database, and scheduling is balanced respectively to each class database,
It is easy to data base call, improves the access efficiency of database.
Fig. 2 is the schematic block diagram of the access mechanism 100 of database according to another embodiment of the present invention, the visit of the database
Device 100 is asked on the basis of a upper embodiment, increase can be selected with the one or more of lower module：Index modification module
150th, reminding module 160, order module 170.
Index modification module 150 repaiies index after the database instance that the access index of example access modules 140 is pointed to
The database instance of next order is changed to point to, so that next access index modified module 150 is interviewed in a database instance
After asking, index modification, to point to the database instance of next order, will can be avoided repeating to carry out same database instance
Access, it is ensured that the database instance normally connected in index can be accessed, it is achieved thereby that balance scheduling.Per class
Database instance in database is arranged according to setting order in advance, and database instance is being added to a class database
(addition and/or deletion) is operated also to include afterwards：Order module 170 can be entered to the database instance in such database
Row rearrangement, so as to ensure that database instances all in such database have an opportunity to be accessed.
In the case where database instance is not completely in normal connection, in order to avoid long-time is real to same database
Example carries out repeating connection, and example access modules 140 can also check that index is pointed in the case where accessing connection status to disconnect
Database be most recently connected the time；Be most recently connected apart the time interval be shorter than default threshold value in the case of, attempt weight
The database that new join index is pointed to, and after reconnecting successfully, the database instance that access index is pointed to.Above-mentioned threshold value can
It is configured, so as to carry out time restriction to attempting reconnect, is prevented short with the connection according to database instance
The database instance that connection can not be connected is frequently attempted in time, waste of time is reduced, improves efficiency.
Example access modules 140 find that the database instance that current index is pointed to apart is most recently connected the interval of time and is longer than
In the case of threshold value, the database instance of the type for the database for needing to access can one by one be looked into according to setting order
Ask, until the database instance being in just in connection status is inquired, and the database instance that access queries go out.
Index modification module 150 is accessed in example access modules 140 after database instance, is just sensing by index modification
The database instance of next order of the database instance of current accessed, no matter the database instance of current accessed be reconnect or
Inquiry is drawn one by one.
Reminding module 160 can be carried out according to setting order to the database instance of the type for the database for needing to access
After inquiring about one by one, if not inquiring the database instance being in just in connection status, returned data storehouse connection failure information,
Do not have namely in the case that database instance normally connects, to be alerted, prompting maintenance personnel enter in current database type
Row is intervened.
The embodiment of the present invention additionally provides a kind of access method of database, and the access method of the database can be by above-mentioned
The access mechanism 100 of the database of any embodiment is performed, by being classified and being utilized index to database in homogeneous data
Load balancing is carried out between the database instance in storehouse, so as to improve the access efficiency of database.Fig. 3 is according to a reality of the invention
The schematic diagram of the access method of the database of example is applied, the access method of the database includes：
Step S302, obtains the type for the database for needing to access；
Step S304, calls the type of the database with needing to access is corresponding to index；
Step S306, it is determined that the connection status for the database instance that index is pointed to；
Step S308, is the database instance that access index is pointed to just in the connected situation in connection status.
In the present embodiment, multiclass is divided into according to type of service in advance for the database of access, per in class database
Database instance is arranged, and be respectively arranged with respective index in advance according to setting order.Can be with per class database
Database instance is reset, (adds and/or deletes being added database instance to a class database and being operated
Except) after, the database instance in such database can also be resequenced, so as to ensure own in such database
Database instance have an opportunity to be accessed.
After step S306, if in the case that the access connection status for the database instance that index is pointed to is disconnects,
Check the database that index is pointed to is most recently connected the time；The interval that the time is most recently connected apart is shorter than the feelings of default threshold value
Under condition, attempt to reconnect the database of index sensing and after reconnecting successfully, the database instance that access index is pointed to.
Be most recently connected apart the time interval be longer than threshold value in the case of, according to setting order to need access database type
Database instance inquired about one by one, until inquiring in just in the database instance of connection status, and access queries go out
Database instance.
After to the database instance of the type for the database for needing to access inquire about one by one according to setting order, if
Do not inquire in just in the database instance of connection status, returned data storehouse connection failure information.
Above-mentioned threshold value can be configured according to the connection of database instance, so as to be carried out to attempting reconnect
Time restriction, prevents from frequently attempting to the database instance that connection can not be connected in a short time, reduces waste of time, improve
Efficiency.
A certain database instance is being accessed (when either indexing database instance or the company of mistake of the normal connection of sensing
Between be shorter than threshold value and the again database instance of successful connection or according to setting order poll draw in connecting shape
The database instance of state) after, the sensing of index is revised as the database instance of the next order of database instance of current accessed.
So as to so that the database of all normal connections has an opportunity to be accessed, realize and scheduling.
Fig. 4 is the schematic flow sheet of the access method of database according to another embodiment of the present invention, and the flow is described
A complete process of certain class database is accessed, wherein i represents the pointer of index, and the database instance that d points to for index i should
Flow can include：
Step S402, obtains the access request of database；
Step S404, it is determined that needing the type of database accessed；
Step S406, judges whether such database instance, if being not present, and performs step S428, assert data
Storehouse connection failure, exports prompt message；
Step S408, obtains the index of such database, it is determined that current index point i；
Step S410, obtains the database instance that index i is pointed to：d；
Step S412, judges whether database instance d connects normally；
Step S414, when database instance d is not in connection status, between the time that judging distance last time d is normally connected
Every whether more than threshold value；
Step S416, if time interval is without departing from threshold value, it tries reconnect；
Step S418, if attempting to reconnect failure or time interval more than in the case of threshold value, modification index i refers to
To next database instance；
Step S420, obtains the database instance that amended index i is pointed to；
Step S422, judges whether database instance normally connects；
Step S424, in the case where database instance is not in connection status, judges whether the example of class database is complete
Portion's inquiry is finished, if performing step S428, is assert database connection failure, is exported prompt message；
Step S426, in the case where database instance is normally connected, modification index i, and return to the data to request source
Storehouse example；
Step S430, in the case of the database instance d that index i is pointed to normally is connected or reconnected successfully, is repaiied
Change index i, point to next database instance, d is returned to request source.
Above-mentioned flow give the complete procedure for the database instance that database determines response to access request, it is necessary to
Illustrate, the flow by way of example only, in further embodiments, can to the order of the part steps of above-mentioned flow with
And execution parameter is modified, to meet specific use demand, wherein the example quantity of types of databases, the type of database
And time interval threshold value can be modified in the case where meeting use demand.
Exemplified by the application environment of software application checking to be provided, equipment state can be respectively arranged in different servers
Storehouse and application state storehouse, then can respectively set to both databases and index and carry out balance dispatching, if desired to equipment shape
When state storehouse is operated, the equipment state storehouse example of first choice can be determined first with the index in equipment state storehouse, if the reality
Example then directly returns to the example just in connection status, and by index modification into the equipment state storehouse example for pointing to next order,
If the example to disconnect time interval shorter, reattempt to connection, and after successful connection, directly return to the reality
Example, and by index modification into the equipment state storehouse example for pointing to next order.If it is longer that the example disconnects time interval,
The equipment state storehouse example connection status of next order, and the equipment state storehouse example that return is normally connected are determined, if afterwards
Equipment state storehouse example is also disconnected, then sequential query, until finding the equipment state storehouse example normally connected or true
Fixed all equipment state storehouse connection failures.
The access method of the database of the present embodiment, it will thus provide the database of data, services is divided according to type of service
Class, index is separately provided per class database, so as to carry out balance dispatching in corresponding database according to type of service, on the one hand
The configuration of database instance can be carried out according to type of service, on the other hand can ensure the access load of same type database
Equilibrium, improves the efficiency for accessing database, and can manage the different types of database instance of multiclass simultaneously, to all kinds of numbers
Arranged in advance according to storehouse example, the database instance for needing to access is determined using index.Abnormal feelings are connected for database
Condition, time restriction has been done to reconnecting, and is prevented from frequently attempting the abnormal database instance of connection in a short time, is reduced the time
Waste, improve efficiency.
So far, although those skilled in the art will appreciate that detailed herein have shown and described multiple showing for the present invention
Example property embodiment, still, still can be direct according to present disclosure without departing from the spirit and scope of the present invention
It is determined that or deriving many other variations or modifications for meeting the principle of the invention.Therefore, the scope of the present invention is understood that and recognized
It is set to and covers other all these variations or modifications.
Claims (10)
1. a kind of access method of database, it is characterised in that including：
The type for the database for needing to access is obtained, wherein multiclass is divided into according to type of service in advance for the database accessed,
Database described in per class is provided with respective index；
Call index corresponding with the type of the database for needing to access；
Determine the connection status for the database instance that the index is pointed to；
In the connection status database instance pointed to is indexed for just in the connected situation, access is described.
2. according to the method described in claim 1, it is characterised in that after the database instance that the index is pointed to is accessed also
Including：
By the index modification to point to the database instance of next order, for access next time, wherein database described in per class
In database instance arranged in advance according to setting order.
3. method according to claim 2, it is characterised in that it is determined that the connection for the database instance that the index is pointed to
Also include after the step of state：
In the case where accessing the connection status to disconnect, check the database that the index is pointed to is most recently connected the time；
In the case where being shorter than default threshold value at a distance of the interval for being most recently connected the time, attempt the reconnect index and refer to
To database, and after reconnecting successfully, access database instance that the index points to and be by the index modification
Point to the database instance of next order.
4. method according to claim 3, it is characterised in that
In the case where being longer than the threshold value at a distance of the interval for being most recently connected the time, according to setting order to the need
The database instance of the type for the database to be accessed is inquired about one by one, until inquiring in just in the data of connection status
Storehouse example, and the database instance that access queries go out.
5. method according to claim 4, it is characterised in that
It is being inquired about one by one to the database instance of the type of the database for needing to access according to setting order
Afterwards, if not inquiring in just in the database instance of connection status, returned data storehouse connection failure information.
6. method according to claim 2, it is characterised in that
Also include after database instance addition is added to database described in a class and/or is deleted：To such database
In database instance resequenced.
7. a kind of access mechanism of database, it is characterised in that including：
Type acquisition module, be configured to obtain need access database type, wherein for access database in advance according to
Type of service is divided into multiclass, and database described in per class is provided with respective index；
Calling module is indexed, is configured to call index corresponding with the type of the database for needing to access；
State-query module, is configured to determine the connection status for the database instance that the index is pointed to；
Example access modules, are configured to index the number pointed in the connection status for just in the connected situation, access is described
According to storehouse example.
8. device according to claim 7, it is characterised in that also include：
Index modification module, is configured to after the example access modules access the database instance that the index is pointed to, will
The index modification is points to the database instance of next order, for access next time, wherein the number in database described in per class
Arranged in advance according to setting order according to storehouse example.
9. device according to claim 8, it is characterised in that
The example access modules are configured to：In the case where accessing the connection status to disconnect, check that the index refers to
To database be most recently connected the time；In the case where being shorter than default threshold value at a distance of the interval for being most recently connected the time,
Attempt to reconnect the database that the index is pointed to, and after reconnecting successfully, access the database that the index is pointed to
Example, and
The index modification module, be configured to the example access modules access it is described index point to database instance it
Afterwards, by database instance of the index modification for the next order of sensing.
10. device according to claim 9, it is characterised in that
The example access modules are configured to：It is being longer than the situation of the threshold value at a distance of the interval for being most recently connected the time
Under, the database instance of the type of the database for needing to access is inquired about one by one according to setting order, until
Inquire the database instance being in just in connection status, and the database instance that access queries go out；And the database
Access mechanism also includes：
Reminding module, is configured to：Real to the database of the type of the database for needing to access according to setting order
Example is carried out after inquiring about one by one, if not inquiring in just in the database instance of connection status, the connection of returned data storehouse is lost
Lose information；And
Order module is configured to：Also wrapped after database instance addition is added to database described in a class and/or is deleted
Include：Database instance in such database is resequenced.
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| CN109271438A (en) * | 2018-10-10 | 2019-01-25 | 上海艾融软件股份有限公司 | A kind of data bank access method and its system |
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| CN107066522B (en) | 2020-03-17 |
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