JPS6149710B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides an information processing center (from a central processing unit and an external storage device, etc.) and several sales offices (one
In an online information processing system that exchanges information with terminal devices installed in stores (sometimes stores), these stores can store files on external storage devices at the information processing center during online service. The system's processing efficiency is improved by processing the so-called center cuts, which are updated in bulk based on comprehensive information from external companies, etc., according to the load status of the central processing unit without degrading the online service of the branch. Regarding the center cut method.

The online information processing system referred to here can be easily understood by considering, for example, a banking system at a bank. In other words, the information processing center is A
It is a bank's computer center, and its sales offices are the head office and each branch of Bank A.

The terminal devices include various counter terminal devices installed at the main store and each branch, and cash dispensers installed inside or outside the store. In the banking system,
In addition to information from such branch terminals, information from each branch terminal of other banks is connected to Bank A's calculation center via the national bank data communication system, or is installed in general station premises. In some cases, the information from the cash dispenser is connected to Bank A's calculation center via the Japan Cash Service System.

In such a banking system, of course, in response to requests for deposits or withdrawals from customers who come to the counter of each branch, the customer's passbook is updated and recorded in a file on an external storage device such as a magnetic disk device located at the calculation center. Updates to the bank's ledger must be processed online and instantly. Furthermore, even if a payment is made using a cash dispenser other than a counter or a deposit is processed into an automatic teller machine, at least the ledger in the file of the calculation center must be immediately updated online. In particular, processing requests by the cash dispenser occur completely randomly, and this response must be processed within a certain period of time, for example, 3 seconds.
Due to the nature of banking operations, it is absolutely impossible to degrade online services during operating hours of these cash dispensers.

However, on the other hand, in addition to such online services, data processing operations in the banking system include, for example, employees C, D...M of company B.
has an account at Bank A, and pays the salaries of those employees to Bank A.
Bank A's calculations include salary transfer data when transferring money to a bank account, or data when a bank A customer's utility charges such as water, electricity, and gas charges are debited from that customer's account. It is necessary to input the information into the center's file and update the ledger record to promptly record the balance status of each customer as of the current point in time.

Such data processing operations are performed by updating the ledger of the calculation center in one batch using recording media such as magnetic tape for each business unit, such as employee salary transfer of company B or electricity bill withdrawal of customer of bank A. There is. Since this data processing work is carried out by sharing the central processing unit of the calculation center with the online service of the branch, it is inevitable that it will have some influence on the online service, and is generally referred to as a center cut.

Conventionally, this center cut processing was not performed during one online service, that is, while the terminal device at the branch was operating or the cash dispenser outside the branch was in operation, but was carried out during the batch processing time after the bank was closed. Either the branch's online service was not degraded, or the operators of the two calculation centers used statistical information such as relatively free banking hours during the day. In addition, it controlled the operation of the calculation center during online service.

However, according to such a conventional method, 1
In the case of method (2), the batch processing time becomes long and there are problems with personnel management, operational management, etc. Also 2
In the case of the above method, since the center cut is performed based on human judgment, it is not possible to accurately adjust the load on the central processing unit, causing a decline in the online service of the branch.

The present invention aims to prevent the online service itself from deteriorating as in conventional methods when center cutting is performed in an online information processing system. The purpose is to improve the processing efficiency of the central processing unit and, by extension, the processing efficiency of the entire online information processing system by performing center cut processing after grasping the situation.

In this way, we can prevent the deterioration of online services and
In order to achieve the purpose of increasing the processing efficiency of an online information processing system, the present invention is realized by the following method. That is, in an online information processing system consisting of an information processing center consisting of a central processing unit, an external storage device, etc. and a plurality of terminal devices connected to the center, online communication between the information processing center and each terminal device is When performing center-cut information processing other than information processing, center-cut information processing is started at regular intervals and the amount of center-cut information processing is automatically controlled according to the load condition of the central processing unit.

Next, the present invention will be explained in more detail with reference to embodiments shown in the drawings.

FIG. 1 is a system block diagram schematically showing an example of a banking system of an online information processing system to which the present invention is applied. In figure 1
T ₁ , T ₂ ...Tn is the counter device of each branch, CD ₁ ,
CD ₂ ...CDn also refers to the cash dispenser installed outside each branch, and usually T ₁ and CD ₁ are installed at one branch, T ₂ and CD ₂ , etc. are installed at the next branch. It can be considered that Of course, it is normal for each branch office to have a plurality of these machines installed, and it is also normal for there to be other types of terminal equipment such as automatic teller machines, but here we will explain the method of the present invention to make it easier to explain. Therefore, it is extremely simplified. That is, a terminal device, a teller device indicated by 1 and 2, and a cash dispenser are provided. 3 is a communication control unit (abbreviated as CCU), 4 is a central processing unit (abbreviated as CPU), 5 is a magnetic disk device (abbreviated as DU) as an external storage device, and 6 is a magnetic tape device (abbreviated as MT). ing. These CCU, CPU, DU,
As shown by the dotted line 7, MT, etc. are installed in the bank's calculation center (CS). For example, cash dispenser CD ₁ at a certain branch.
When a customer uses the service, when the customer's cash card is inserted, CD ₁ reads the account number, personal authentication code, etc., and then the customer enters this code and the amount they wish to withdraw using the key. Once set, the account number, amount, etc. are sent to the communication control unit CCU in the center 7 via the data communication line.

After processing such as assembling the data from code into characters in the CCU, the data is sent to the storage device of the central processing unit CPU. When data is generated intensively from other terminal devices, the processing of the data by the CPU is forced to wait, is managed as a queue, and is processed according to priority.
When it comes to processing the data from CD ₁ , the corresponding customer's balance is read from the ledger recorded in the large-capacity magnetic disk device DU according to the previous account number, and the data for the above amount is read out. If the amount is less than the balance, CD ₁ is notified via the communication line that the withdrawal is OK, and the difference is calculated to become the new balance, which is again recorded as the balance in the DU ledger. At the same time, the new balance is notified to CD ₁ via the communication line, and a slip with the cash withdrawal amount and the new balance printed on it is issued to the customer using CD ₁ .

Such online processing operations can be used, for example, on CDs.
In this case, it will be processed within 3 seconds.

Normally, hundreds or thousands of terminal devices 1 and 2 are connected, and since data from each terminal is generated randomly, especially when data is generated in a concentrated manner,
The CPU load must perform its maximum processing power.

At such times, when the magnetic tape (MT) 6 for bulk ledger update operations such as salary transfers and utility bill withdrawals is set and processed at the center 7, the CPU queues the data for online processing. This will result in a bulk ledger update, ie, a center cut, which will degrade the online service.

In order to prevent such problems from occurring, the present invention automatically grasps the CPU load at all times and performs center cut within the CPU load capacity to prevent online service from deteriorating and improve the processing efficiency of the entire system. This is the way to do it.

Figure 2 shows a CPU operating according to the method of the present invention.
24 functions (functions based on the combination of CPU hardware, OS, and other processing programs)
, a terminal device 21, a file device 25 where the ledger is recorded, and an MT 26 for center cut.
FIG. 2 is a functional block diagram illustrating the operations between the

Figure 3 is a diagram explaining how the number of cases handled by the CPU, W, changes over time.
The figure shows how the method of the present invention can be applied to transaction load
FIG. 5 is a diagram illustrating the time course of the online transaction serial number OLT/SNO for explaining the method of the present invention.

In FIG. 2, the data generated at the terminal device 21 is 2
As shown by line 2, the online processing function OLP and update function REN (24-
1), and then the file control function
It is passed to the FC (indicated by 24-4), and controls reading the balance from the file device F25 and writing a new balance as described above.

Here, the functions of OLP+REN mentioned above include a function of inputting the data generated by the terminal device T into the storage device and calculating the data read from the file F, and updating the file F with the result of calculation of the new balance.
It shows the function of sending the processing results back to the terminal device T and the function of cumulatively adding the number of online transactions processed in this way to the counter of the CPU. This online transaction number is shown as 24-2 in Figure 2.
OLT/SNO, ie online. This value is accumulated as a transaction serial number, and this value is used to grasp the CPU load state in the present invention as described later.

Such online processing continues without interruption while the system is in operation, and FIG. 3 shows the elapsed time. Here, W is the number of cases handled, and Q is the CPU
's maximum processing capacity, OLT, shows the online transaction volume of all operating stores over time. Therefore, the shaded K indicates the remaining CPU capacity.

Referring again to FIG. 2, the lines indicated by IMTs 26 and 27 and O.MT 27 indicate the flow of information in the center cut described above. I・MT26
For example, when transferring the salary of an employee of company B, among the functions of the CPU 24, the center cut control function unit CCC 24-3 first performs the following functions:
The amount of processing at one time is controlled within the available capacity of the CPU load, and is passed to the file control function FC, which reads the balance of each employee from the file device F25.
An operation is performed to add the amount of salary transferred by the center cut, and the new balance is recorded in the ledger in F.

At the same time, the results are output to the O/MT 26' via the CCC function.

The method of center cut control in consideration of the CPU load according to the present invention is performed by this CCC 24-3 functional section. This CCC functional unit has the following three functions. That is, (1) understanding the CPU load, (2) controlling the number of center cut information processes, and (3) handing over the center cut information to the business. To explain step by step, starting from understanding the CPU load, the first step is to (a) set the time start interval for center cut processing. That is, the center cut process is started at regular time intervals, and processes the number determined by controlling the number of center cut information processes to be described later, out of the number of requests to be processed. The time interval from this startup to the next startup is usually 1
It is set to a value between 5 minutes and 5 minutes. This time interval is indicated by Δt in FIGS. 4 and 5.

Next, (b) set the CPU online handling maximum processing capacity. This is the maximum number of cases that can be handled online within the time interval △t set in (a),
This is Q ₀ in Figure 4. Third, (c) grasp the CPU load, which is done as follows. The center cut process is started at every time interval Δt set in (a). Now, Figures 4 and 5 t ₁
Suppose it is started at the time. The online information at the information processing center secured at the end of the center cuts processed during the time interval △t after the previous startup time t ₀ .
The transaction serial number OLT/SNO is referenced by the counter shown at 24-2 in FIG. This value is X in FIG. Using this as rotation information, the following calculation is performed using the value Y of the online transaction serial number OLT·SNO at the current center (time t ₁ ).

That is _, Q ₀ - (Y - X ₎ = K _{0 ......} (1) From Fig. 5, Y - corresponds to online traffic P ₀ . The value K ₀ of the above equation (1) is
This is the remaining CPU capacity, and this is understood as the CPU load. The calculation of equation (1) is executed under the control of the center cut control function section CCC of the CPU 24 shown in FIG.

Next, the 3
Of the two functions, (2) control of the number of center cut information processes will be explained.

When K ₀ is determined at startup by understanding the CPU load, it is read into the main memory of the CPU from the magnetic tape I/MT (Figure 2) for inputting the center cut information for this time (at startup at time t ₁ ). The center cut process is performed only on the read center cut information. The remaining center cuts will be turned to _t2 at the next startup. In this case, the previous CPU load K ₀ is approximately equal to the current CPU load K ₁ due to the characteristic that the transition of online transactions at the branch draws a gentle curve.

That is, from FIG. 4, Q ₀ −P ₀ ≒Q ₁ −P ₁ .

Therefore, to control the number of center cut information processes, the current number of processes can be set based on the CPU load K ₀ obtained from the data at the previous startup. In addition, the curve of transaction load TL in Figure 4 is the same as that of online transaction in Figure 3.
This is an enlarged view of a portion of the OLT curve. This kind of control of the number of center cut information processing is carried out by using the same concept to control K ₁ at the next startup time t ₂ .
It is understood as CPU load, and control is performed based on this.

The transfer of center cut information to the business as a function of the center cut control function unit is as follows. That is, the center cut information magnetic tape I/MT is the same as the upstream message format for online transactions at the branch office, and only this information is handed over to the business, and the subsequent processing is almost the same as online at the branch office. This processing is carried over to the file control function FC shown in FIG.

In the explanation of the embodiment of the present invention, the function of the CPU has been explained as shown in FIG.
The method of the present invention can be implemented with any CPU configured to include a CPU load grasping means, a center cut information processing control means, and a means for delivering center cut information to a business. Of course, each of these means can also be realized by a processing program having each of these functions and a control program that controls them.
The same applies to the CPU functions OLP+REN and FC functions.

As described above, if the present invention is applied as a center cut method in an online information processing system, it is possible to prevent the deterioration of online services, and because the CPU load is always automatically grasped and controlled, the processing efficiency of the system is significantly improved. It has the effect of

[Brief explanation of the drawing]

FIG. 1 is a system block diagram of an online information processing system to which the present invention is applied, in which 1 and 2 are terminal devices 3, a communication control device, 4 a central processing unit,
Reference numeral 5 indicates an external storage device, 6 a magnetic tape device, and 7 an information processing center. FIG. 2 is a functional block diagram explaining the operation of the present invention, in which 21 is a terminal device, 22 and 27 are lines indicating the flow of information, and 2
4 is a central processing unit, 25 is an external storage device, 26,
26' indicates a magnetic tape device. FIG. 3 is a graph showing the processing amount of the central processing unit over time, FIG. 4 is an enlarged view of a part of FIG. 3, and FIG. 5 is a time lapse chart showing the cumulative online handling amount.

Claims (1)

[Claims] 1. An information processing center consisting of a central processing unit, an external storage device storing a plurality of pieces of information corresponding to a plurality of processing units, and a plurality of terminal devices connected to the information processing center, The central processing unit is an online information processing device that executes a center cut information processing device that reads and processes a plurality of pieces of information stored in advance in an external storage device, and also executes online information processing in response to processing requests from the terminal device. In this step, the load on the central processing unit is measured at regular time intervals, and center cut information processing is activated at the regular time intervals, and the center cut information processing is performed based on the activated information among a plurality of pieces of information stored in advance in the external storage device. An online information processing system characterized by reading out a number of pieces of information from the external storage device according to the load on the central processing unit at the certain time just before , and performing center cut information processing on the information read from the external storage device. Center cut control method in the system.