CN105635263B - Access processing method and adapter based on backstage caching - Google Patents
Access processing method and adapter based on backstage caching Download PDFInfo
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- CN105635263B CN105635263B CN201510994074.6A CN201510994074A CN105635263B CN 105635263 B CN105635263 B CN 105635263B CN 201510994074 A CN201510994074 A CN 201510994074A CN 105635263 B CN105635263 B CN 105635263B
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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
- H04L67/50—Network services
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- H04L67/568—Storing data temporarily at an intermediate stage, e.g. caching
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Abstract
The embodiment of the invention discloses a kind of access processing methods and adapter, system based on backstage caching, the described method includes: adapter receives the request string that foreground system is sent, the request string is combined by access request grouping and its corresponding host IP address and standby host IP address；It inquires in shared drive with the presence or absence of all IP address in the request string；If all IP address are not to initialize shared drive all in shared drive, and inquiry shared drive whether there is all IP address in the request string again in the request string；If all IP address in the request string all in shared drive, find the current the smallest machine of IP connection number, connects with current IP connection number the smallest machine, the result is simultaneously returned to the foreground system by acquisition result.The load balancing for accessing hind computation system, greatly reduces the data pressure of hind computation system, improves cache hit rate, reach efficient active-standby switch.
Description
Technical field
The present invention relates to data processing technique more particularly to a kind of access processing methods and adaptation based on backstage caching
Device.
Background technique
Domestic Civil Aviation Industry, which services, in recent years is flourished, particularly important, the hind computation that shopping engine becomes
System is also faced with huge pressure when handling fare data.It is balanced in order to reduce the data pressure to hind computation system
Access, can be switched fast, the adapter for accessing computing system becomes indispensable in mechanical disorder.
Adapter is responsible for connection of the foreground system to computing system.If computing system break down or access it is excessively high,
It needs the data of foreground system being switched to access standby system.At this moment, it is desirable that adapter can automatically switch to standby system
And starts emergency process and guarantee foreground system performance.After computing system is restored, adapter continues data switchback computing system, weight
The new host for using computing system.
In view of hind computation system has the caching mechanism of machine on single machine, in order to improve the hit to caching
Rate will also destroy the load balancing of entire hind computation system, in this way, just even if making that specific machine is accessed to requests classification
Caching and load balancing when needing to access optimize.
It is, therefore, desirable to provide a kind of new access module or access method, can call hind computation system in foreground system
It when system, realizes to the load balancing of computing system accesses, reduces the data pressure of computing system, and reach efficiently active and standby and cut
It changes and high level cache hit rate.
Summary of the invention
To solve existing technical problem, the embodiment of the present invention provides a kind of access process side based on backstage caching
Method and adapter.
In order to achieve the above objectives, the technical solution of the embodiment of the present invention is achieved in that
The embodiment of the invention provides a kind of access processing methods based on backstage caching, which comprises
Adapter receives the request string that foreground system is sent, and the request string is by access request grouping and its corresponding host
IP address and standby host IP address are combined into；
It inquires in shared drive with the presence or absence of all IP address in the request string；
If all IP address are not to initialize shared drive, and again all in shared drive in the request string
Shared drive is inquired with the presence or absence of all IP address in the request string；
If in shared drive, it is the smallest all to find current IP connection number for all IP address in the request string
Machine is connect with the current the smallest machine of IP connection number, obtains result and the result is returned to the foreground system.
Wherein, the method also includes: before connecting with the current the smallest machine of IP connection number, update the machine
IP connection number, and the control block for controlling the shared drive is written and read locking to the data block of the machine；Obtaining result
Afterwards, it controls the control block and unlock is written and read to the data block of the machine, update the IP connection number of the machine again.
Wherein, if all IP address in the request string are all in shared drive, determine that current only access calculates
The host of system still accesses the host and standby host of computing system, if the current host for only accessing computing system, access is altogether
The smallest machine of IP connection number is found in the host IP address list for enjoying memory, if the host of current accessed computing system and standby
Machine then accesses host IP address list and the standby host IP address list of shared drive, finds the smallest machine of IP connection number.
Wherein, the initialization, comprising:
The control block for controlling the shared drive locks the read-write of all data blocks；
Again all IP address of the request string are inquired whether all in the shared drive；If it is not, then will not
IP address in the shared drive is added to the shared drive, updates the IP address number of the control block, described in control
Control block unlocks the read-write of all data blocks；
The read-write of all data blocks is unlocked if so, controlling the control block.
Wherein, before receiving the access request that foreground system is sent, the method also includes:
Access request is grouped, each grouping corresponding one by the format that foreground system is decided through consultation by agreement by scheduled strategy
Each access request is grouped and its corresponding host IP address and standby host IP by group host IP address and one group of standby host IP address
Request string that location is combined into simultaneously is sent to the adapter.
The embodiment of the invention also provides a kind of adapter, the adapter includes:
Receiving module, for receiving the request string of foreground system transmission, request string is grouped and its right by access request
The host IP address and standby host IP address answered are combined into；
Enquiry module, for inquiring in shared drive with the presence or absence of all IP address in the request string；
Initialization module is that all IP address are not all altogether in request string for the result in the enquiry module
When enjoying memory, then shared drive is initialized, and return to enquiry module；
Access modules are all IP address in request string all shared interior for the result in the enquiry module
When depositing, then the current the smallest machine of IP connection number is found, connect with the current the smallest machine of IP connection number, obtains result and by institute
It states result and returns to the foreground system.
Wherein, the access modules are also used to:
Before connecting with the current the smallest machine of IP connection number, the IP connection number of the machine is updated, and described in control
The control block of shared drive is written and read locking to the data block of the machine；
After obtaining result, controls the control block and unlock is written and read to the data block of the machine, update institute again
State the IP connection number of machine.
Wherein, the access modules are used for: if all IP address in the request string all in shared drive, really
The host that computing system is only accessed before settled still accesses the host and standby host of computing system, if currently only accessing computing system
Host, then the host IP address list for accessing shared drive finds the smallest machine of IP connection number, if current accessed calculates
The host and standby host of system then access host IP address list and the standby host IP address list of shared drive, find IP connection number
The smallest machine.
Wherein, the initialization module is used for: the control block for controlling the shared drive adds the read-write of all data blocks
Lock；Again all IP address of the request string are inquired whether all in the shared drive；If it is not, then will be not described
IP address in shared drive is added to the shared drive, updates the IP address number of the control block, controls the control block
The read-write of all data blocks is unlocked；The read-write of all data blocks is unlocked if so, controlling the control block.
The embodiment of the invention also provides a kind of access process systems based on backstage caching, and the system comprises foregrounds
System, computing system and above-mentioned adapter, wherein foreground system, the format for being decided through consultation by agreement, by access request
By scheduled strategy grouping, the corresponding one group of host IP address of each grouping and one group of standby host IP address, by each access request point
Request string that group and its corresponding host IP address and standby host IP address are combined into simultaneously is sent to the adapter.
The embodiment of the present invention calls backstage in foreground system using the combination of the technologies such as shared drive, counter, control lock
Computing system when, make hind computation system access load balancing, greatly reduce the data pressure of hind computation system.And
By the cache policy of hind computation system, and using the access strategy of load balancing, cache hit rate is further improved, and
Efficient active-standby switch can be reached.
Detailed description of the invention
In attached drawing (it is not necessarily drawn to scale), similar appended drawing reference can describe phase in different views
As component.Similar reference numerals with different letter suffix can indicate the different examples of similar component.Attached drawing with example and
Unrestricted mode generally shows each embodiment discussed herein.
Fig. 1 is a flow diagram of access processing method of the embodiment of the present invention；
Fig. 2 is another flow diagram of access processing method of the embodiment of the present invention；
Fig. 3 is another flow diagram of access processing method of the embodiment of the present invention；
Fig. 4 is the composed structure schematic diagram of adapter of the embodiment of the present invention；
Fig. 5 is the composed structure schematic diagram of access process of embodiment of the present invention system.
Specific embodiment
The embodiment of the present invention is using shared drive, counter, the combination for controlling the technologies such as lock, foreground system to calculating system
The direct access of system, is converted to three layers of call relation of adapter intermediate coordination, to call the calculating on backstage in foreground system
When system, make the load balancing of hind computation system access.
As shown in Figure 1, it is provided in an embodiment of the present invention based on backstage caching access processing method, mainly may include as
Lower step:
Step 101: access request is strategically grouped, each grouping by the format that foreground system is decided through consultation by agreement
Corresponding one group of host IP address and one group of standby host IP address, and the host IP address and standby host that each access request is corresponding
IP address is combined into request string, is sent to adapter, and adapter receives the request and goes here and there, analysis request string, with decompositing host ip
Location group and standby host IP address group；
Step 102: adapter traverses the IP address list in shared drive, inquires the IP address of the request string shared
Whether all exist in memory；
If the IP address of the request string all exists in shared drive, continue step 109；If the request string
IP address be not all to exist in shared drive, then continue step 103；If
Step 103: the control block for controlling shared drive locks the read-write of its all data block；
Step 104: traversing the IP address list in shared drive again；
Step 105: whether the IP address of the inquiry request string is in the IP address list of shared drive；, if it is,
Continue step 108；Otherwise continue step 106；
Step 106: the IP address not in shared drive is added in shared drive；
Step 107: updating the IP address number of control block；
Step 108: the control block for controlling shared drive unlocks the read-write of all data blocks；
Step 109: determine the current host system for only accessing computing system, or access computing system host system and
The reserve system of computing system；
Step 1010: if only accessing host, accessing shared drive, inquire the IP address list of host, find connection
The smallest IP address of number；If accessing host system and reserve system, shared drive is accessed, the IP address list of host is inquired
With the IP address list of standby host, the current the smallest machine of IP connection number is found；
Step 1011: the IP connection number of IP connection number minimum machine is added 1 by control block, and by the read-write of the machine data block
It locks；
Step 1012: adapter is connect with the current the smallest machine of IP connection number, obtains result；
Step 1013: control block unlocks the data block of IP connection number minimum machine, and subtracts 1 for IP connection number；
Step 1014: the result of acquisition is returned to foreground system by adapter, and process terminates.
Wherein, there is also in step 1012 time-out situation, if time-out do not receive yet as a result, if adapter still
Step 1013 is executed, and time exceeded message is returned into foreground system in step 1014.
Specifically, the access method of the embodiment of the present invention can also be realized by process shown in Fig. 2, it is specific as follows:
Step 201: access request is strategically grouped, each grouping by the format that foreground system is decided through consultation by agreement
Corresponding one group of host IP address and one group of standby host IP address, and the host IP address and standby host that each access request is corresponding
IP address is combined into request string, is sent to adapter, and adapter receives the request and goes here and there, analysis request string, with decompositing host ip
Location group and standby host IP address group；
Step 202: the IP address of machine in the computing system that adapter is provided by foreground system, inquiring these addresses is
It is no all in shared drive；
Wherein, specific shared drive is searched by the system shared drive key assignments (ipckey) configured
(sharememory) position is gone in memory to read corresponding structural data.
Step 203: if not all existing in shared drive, entering step 204；Otherwise, it is directly entered step 208；
Step 204: the control block of shared drive locks the read-write of its all data block, prevents from writing data behaviour between multi-process
Work conflicts；
Wherein, control block is the data in shared drive, prevents data writing operation from rushing by locking mechanisms between multiple processes
It is prominent.
Step 205: traversing the IP address list in shared drive again, whether check after locking has address not yet altogether
It enjoys in memory and initializing.If it is, continuing step 207；Otherwise continue step 206；
Step 206: the IP address not in shared drive is added in shared drive.
Step 207: updating the IP address number of control block, control block unlocks the read-write of all data blocks；
Wherein, it needs to record existing IP address sum i.e. IP address number in step 206-207, in control block, and builds
Found the index of each IP address.
Step 208: the active and standby information that adapter checking monitoring program provides determines the current host for only accessing computing system
System, or access the host system of computing system and the reserve system of computing system；
Wherein, computing system host system is monitored using monitoring programme, whether checks computing system host system
Normally.Analog value is set in shared drive, and indicating adapter, this uses host system or host system and reserve system.
Step 209: access shared drive finds the smallest machine of IP connection number in main (standby) machine IP address list.
Wherein, the smallest by IP connection number in shared drive lookup host (standby host) IP address list.Concrete mode are as follows:
Memory address existing for control block is found by ipckey, memory address is formatted, uses IP address as key, circulation
Find the corresponding connection number of each IP.Number of request is an IP address of request computing system every time, by the IP connection of the address
Number plus 1 obtains subtracting 1 for IP connection number after result (time-out).
Wherein, if currently used is host, the IP connection number minimum machine of host is just looked for, if currently used is
Standby host looks for the IP connection number minimum machine of standby host.
Step 210: control block is by the access number (i.e. IP connection number) of IP connection number minimum machine plus 1, and by its data block
Read-write lock；
Step 211: the smallest machine of connection number establishes connection in the computing system on adapter and backstage, sends request, obtains
To result or time-out, control block unlocks the read-write of the data block of IP connection number minimum machine, and by it by access number (i.e. IP
Connection number) subtract 1；
Wherein, in step 11, adapter issues request to finally selected computing system machine, and obtain as a result,
Result is returned into host process.
Step 212: obtained result information or time-out information are returned into foreground system.
The embodiment of the present invention uses share memory technology, control lock technology etc., and adapter and monitoring programme can adopt
It is developed, is repeated no more with C++.
Such as Fig. 3, access processing method of the embodiment of the present invention can also realize that detailed process is such as by following process
Under:
Step 301: access request is strategically grouped by the format that foreground is decided through consultation by agreement, to each grouping pair
It answers one group of host IP address and one group of standby host IP address to be combined into request string and is sent to computing system adapter.
Wherein, the access request on foreground can be split request by certain key assignments strategy, will according to the strategy
The every group of request split corresponds to specific key assignments, passes through pre-configured corresponding n (n is the integer not less than 1) the platform master of key assignments
Machine machine and m (m is the integer not less than 1) platform standby host machine sends with corresponding IP address (active/standby) every group of request to suitable
Orchestration.
Due to being related to sending data between process, foreground system and adapter can be deployed under same set of environmental services.This
Inventive embodiments are disposed using tuxedo mode, and foreground system can split request according to mentioned above principle, are divided into multiple requests, are led to
Tpcall (tpacall) mode for crossing tuxedo is sent to adapter, and multiple adapters can all receive corresponding request, then right
Address resolution in request has related to transport protocol between the two here.
Since IP address can be multiple, there are also main and standby relations, i.e. random length, it is common practice that either using identifier
Flag byte length.For example, identifier 1 can be used and divide main IP's and standby IP if identifier is used to distinguish
Actual request divides each IP address between main (standby) IP address list using identifier 2.
Step 302: whether adapter checks these addresses all in shared drive by the computing system IP address provided
In.
Specifically, using share memory structured data, at linux by ipckey by memory address and
Fixed data do correspondence, then the corresponding data of structuring, correspond to IP information to data search.
Step 303: if not all there is shared drive, initialized by step 304 to step 307, if existing,
It is directly entered step 308.
Step 304: the control block of shared drive locks its all data block；
In practical application, data in shared drive are directly operated, unlock is added to the data, prevents from reading IP data later
It is clashed when writing.
In practical application, creation shared drive shared drive is broadly divided into two parts when service starts: control block and data
Block, control block are used to lock or unlock the read-write of data block, and each data block is for storing the relevant information of a machine.One
Control block can manage multiple data blocks simultaneously, and a data block corresponds to a machine of computing system.
Wherein, control block may include following information: the machine quantity that is saved in current background state, shared drive,
IP address number and the index established for each IP.Wherein, current background state (status) value is P or A, and P is indicated only
Host computing system is accessed, does not access standby host computing system, A indicates accessible host computing system and standby host computing system.
The machine quantity saved in shared drive is recorded as serverNo.
Wherein, each data block storage is the relevant all information of a machine, and a data block may include one
The IP (sitaServerIp [16]) of machine, the port (port) of machine, machine the information such as IP connection number (connNums).
Step 305: traversing the IP address list in shared drive again and check after locking whether have address not yet altogether
It enjoys in memory and initializing.If it is, continuing step 307；Otherwise continue step 306；
Specifically, the IP address information in shared drive is read again, is prevented before locking to this is interior during locking
The data deposited are modified by other processes, are thrown into question.Find that the IP address information does not have still if read again, then to the knot
The IP address information is written in structure data, and initializes corresponding data.The IP configuration index of final updating entirety again will
Total writes back in shared drive.
Step 306: the IP address not in shared drive is added in shared drive.
Step 307: updating IP address number in control block, control block unlocks all data blocks.
Step 308: the active and standby information that checking monitoring program provides determines the current host system for only accessing computing system,
Or the host system of access computing system and the reserve system of computing system.
Here, monitoring programme carries out relevant operation for receiving monitoring message.If monitoring system finds that computing system is raw
The threshold value that resource anxiety is more than setting is produced, then updating shared drive state is A；If computing system host system restores message,
Then updating shared drive state is P.
Step 309: access shared drive finds the smallest machine of IP connection number in main (standby) machine IP address list.
Step 310: the access number of IP connection number minimum machine is added 1 by control block, and the read-write of its data block is locked；
Step 311: adapter and the smallest machine of IP connection number establish connection, send a request to computing system, are counted
The result or obtain time-out information that calculation system returns, control block unlock the data block of IP connection number minimum machine, and by its
Access number subtracts 1.
Step 312: result information (time-out information) is returned into foreground system.
In embodiments of the present invention, pass through foreground system, the adapter for access process and background computer system
The collaborative work of these three parts handles access request.Foreground system utilizes shared drive, meter when calling hind computation system
The technologies such as number device, control lock, which are realized to reach the load balancing of computing system accesses, to be reduced the pressure of computing system, active and standby cuts
It changes and high level cache hit rate.The share memory technology that the embodiment of the present invention utilizes, timing monitor background system, to access system meter
The modes such as number locking, strategically access computing system, increase the cache hit rate of computing system, and to a certain extent
Load balancing.
Such as Fig. 4, the embodiment of the invention also provides a kind of adapters, and for realizing above-mentioned access processing method, this is suitable
Orchestration includes following part:
Receiving module 41, for receiving the request string of foreground system transmission, request string be grouped by access request and its
Corresponding host IP address and standby host IP address are combined into；
Enquiry module 42, for inquiring in shared drive with the presence or absence of all IP address in the request string；
Initialization module 43 is that all IP address are not all in request string for the result in the enquiry module 42
In shared drive, then shared drive is initialized, and return to enquiry module；
Access modules 44 are all IP address in request string all altogether for the result in the enquiry module 42
When enjoying memory, then the current the smallest machine of IP connection number is found, connect with the current the smallest machine of IP connection number, obtains result simultaneously
The result is returned into the foreground system.
Wherein, the access modules 44 are also used to: before connecting with the current the smallest machine of IP connection number, described in update
The IP connection number of machine, and the control block for controlling the shared drive is written and read locking to the data block of the machine；It is obtaining
It after obtaining result, controls the control block and unlock is written and read to the data block of the machine, the IP for updating the machine again connects
Connect number.
Wherein, the access modules 44 are used for: if all IP address in the request string all in shared drive,
Determine that the current host for only accessing computing system still accesses the host and standby host of computing system, if current only access calculates system
The host of system, then the smallest machine of IP connection number is found in the host IP address list for accessing shared drive, if current accessed meter
The host and standby host of calculation system then access host IP address list and the standby host IP address list of shared drive, find IP connection
The smallest machine of number.
Wherein, the initialization module 43 is used for: controlling the control block of the shared drive for the read-write of all data blocks
It locks；Again all IP address of the request string are inquired whether all in the shared drive；If it is not, then will be not in institute
It states the IP address in shared drive and is added to the shared drive, update the IP address number of the control block, control the control
Block unlocks the read-write of all data blocks；The read-write of all data blocks is unlocked if so, controlling the control block.
Such as Fig. 5, the embodiment of the invention also provides a kind of access process system, which includes foreground system, backstage
Computing system and adapter as shown in Figure 4.When its actual deployment, adapter have it is multiple, foreground system also have it is multiple, calculate
System is also multiple, and a request string can be issued multiple adapters while handled by a foreground system.Here,
Access request is grouped, the corresponding one group of master of each grouping by the format that foreground system can be decided through consultation by agreement by scheduled strategy
Each access request is grouped and its corresponding host IP address and standby host IP address is spelled by machine IP address and one group of standby host IP address
At request string and be sent to the adapter.
It should be understood by those skilled in the art that, the embodiment of the present invention can provide as method, system or computer program
Product.Therefore, the shape of hardware embodiment, software implementation or embodiment combining software and hardware aspects can be used in the present invention
Formula.Moreover, the present invention, which can be used, can use storage in the computer that one or more wherein includes computer usable program code
The form for the computer program product implemented on medium (including but not limited to magnetic disk storage and optical memory etc.).
The present invention be referring to according to the method for the embodiment of the present invention, the process of equipment (system) and computer program product
Figure and/or block diagram describe.It should be understood that every one stream in flowchart and/or the block diagram can be realized by computer program instructions
The combination of process and/or box in journey and/or box and flowchart and/or the block diagram.It can provide these computer programs
Instruct the processor of general purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to produce
A raw machine, so that being generated by the instruction that computer or the processor of other programmable data processing devices execute for real
The device for the function of being specified in present one or more flows of the flowchart and/or one or more blocks of the block diagram.
These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works, so that it includes referring to that instruction stored in the computer readable memory, which generates,
Enable the manufacture of device, the command device realize in one box of one or more flows of the flowchart and/or block diagram or
The function of being specified in multiple boxes.
These computer program instructions also can be loaded onto a computer or other programmable data processing device, so that counting
Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, thus in computer or
The instruction executed on other programmable devices is provided for realizing in one or more flows of the flowchart and/or block diagram one
The step of function of being specified in a box or multiple boxes.
The foregoing is only a preferred embodiment of the present invention, is not intended to limit the scope of the present invention.
Claims (8)
1. a kind of access processing method based on backstage caching, which is characterized in that the described method includes:
Adapter receives the request string that foreground system is sent, and the request string is by access request grouping and its corresponding host ip
Location and standby host IP address are combined into；
It inquires in shared drive with the presence or absence of all IP address in the request string；
If all IP address are not to initialize shared drive, and inquire again all in shared drive in the request string
Shared drive is with the presence or absence of all IP address in the request string；The initialization, comprising: control the control of the shared drive
Clamp dog locks the read-write of all data blocks；Again all IP address of the request string are inquired whether all in the shared drive
In；If it is not, then the IP address not in the shared drive is added to the shared drive, the control block is updated
IP address number controls the control block and unlocks the read-write of all data blocks；If so, controlling the control block for all data
The read-write of block unlocks；
If all IP address in the request string all in shared drive, find the current the smallest machine of IP connection number
Device is connect with the current the smallest machine of IP connection number, obtains result and the result is returned to the foreground system.
2. the method according to claim 1, wherein the method also includes:
Before connecting with the current the smallest machine of IP connection number, the IP connection number of the machine is updated, and is controlled described shared
The control block of memory is written and read locking to the data block of the machine；
After obtaining result, controls the control block and unlock is written and read to the data block of the machine, update the machine again
The IP connection number of device.
3. method according to claim 1 or 2, it is characterised in that:
If all IP address in the request string all in shared drive, determine the current host for only accessing computing system
Or the host and standby host of computing system are accessed, if the current host for only accessing computing system, accesses the master of shared drive
Machine IP address list finds the smallest machine of IP connection number, if the host and standby host of current accessed computing system, access is altogether
Host IP address list and the standby host IP address list for enjoying memory, find the smallest machine of IP connection number.
4. the method according to claim 1, wherein receive foreground system send access request before, institute
State method further include:
Access request is grouped, the corresponding one group of master of each grouping by the format that foreground system is decided through consultation by agreement by scheduled strategy
Each access request is grouped and its corresponding host IP address and standby host IP address is spelled by machine IP address and one group of standby host IP address
It is gone here and there at the request, and request string is sent to the adapter.
5. a kind of adapter, which is characterized in that the adapter includes:
Receiving module, for receiving the request string of foreground system transmission, request string is grouped and its corresponding by access request
Host IP address and standby host IP address are combined into；
Enquiry module, for inquiring in shared drive with the presence or absence of all IP address in the request string；
Initialization module is that all IP address are not all shared interior in request string for the result in the enquiry module
When depositing, then shared drive is initialized, and return to enquiry module；The initialization includes: the control block for controlling the shared drive
The read-write of all data blocks is locked；Again all IP address of the request string are inquired whether all in the shared drive；
If it is not, then the IP address not in the shared drive is added to the shared drive, the IP of the control block is updated
Number of addresses controls the control block and unlocks the read-write of all data blocks；If so, controlling the control block for all data blocks
Read-write unlock；
Access modules are all IP address in request string all in shared drive for the result in the enquiry module
When, then the current the smallest machine of IP connection number is found, is connect with the current the smallest machine of IP connection number, acquisition result simultaneously will be described
As a result the foreground system is returned to.
6. adapter according to claim 5, which is characterized in that the access modules are also used to:
Before connecting with the current the smallest machine of IP connection number, the IP connection number of the machine is updated, and is controlled described shared
The control block of memory is written and read locking to the data block of the machine；
After obtaining result, controls the control block and unlock is written and read to the data block of the machine, update the machine again
The IP connection number of device.
7. adapter according to claim 5 or 6, which is characterized in that the access modules are used for:
If all IP address in the request string all in shared drive, determine the current host for only accessing computing system
Or the host and standby host of computing system are accessed, if the current host for only accessing computing system, accesses the master of shared drive
Machine IP address list finds the smallest machine of IP connection number, if the host and standby host of current accessed computing system, access is altogether
Host IP address list and the standby host IP address list for enjoying memory, find the smallest machine of IP connection number.
8. a kind of access process system based on backstage caching, which is characterized in that the system comprises: foreground system calculates system
System and such as described in any item adapters of claim 5 to 7, wherein
Access request is grouped, each grouping corresponding one by foreground system, the format for being decided through consultation by agreement by scheduled strategy
Each access request is grouped and its corresponding host IP address and standby host IP by group host IP address and one group of standby host IP address
Location is combined into the request string, and request string is sent to the adapter.
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