WO2012070081A1

WO2012070081A1 - Computer system, computer system program replacement method, and program replacement processing program

Info

Publication number: WO2012070081A1
Application number: PCT/JP2010/006836
Authority: WO
Inventors: 市村高志; 高橋則明; 浜田真二; 松本洋和
Original assignee: 株式会社日立製作所
Priority date: 2010-11-24
Filing date: 2010-11-24
Publication date: 2012-05-31

Abstract

In a process involving the execution of transactions involving a program that includes multiple libraries, a function-calling macro control unit, which, when there are threads that use a call function belonging to a library subject to a function call, said library being subject to replacement, completes the processing of all threads that use a function to be called, and, in the interim, resumes transactions that use the library subject to replacement, and which, when there are no threads that use a function to be called, temporarily suspends the execution of transactions that use a library subject to replacement until the library has been replaced. A replacement control unit replaces the library subject to replacement with a new library on condition that the processing of all threads that use a function to be called has been completed.

Description

Computer system, computer system program replacement method and program replacement processing program

The present invention relates to a computer system having an application program replacement function in an online system, a computer system program replacement method, and a program replacement processing program.

Conventionally, in the online system, when it is necessary to make a minor defect correction to an application program, or when it is necessary to improve the performance of an application program, the application program is replaced with a new one.

At this time, when a transaction using the application program is being executed, it is necessary to wait for the end of the transaction to replace the application program.

For this reason, in the conventional online system, it is necessary to stop online after the end of the transaction using the application program, or to replace the application program after stopping the service. In addition, when a transaction being executed lasts for a long time, an urgent application program replacement may not be possible. Here, the service stop means stopping a request for the corresponding business process.

On the other hand, if the management means manages two names of the business library module (LM) at normal time and the switched business LM and their status on the shared memory of each transaction, and the transaction calls the business LM, the management means is shared There has been proposed a method that refers to a name and management state in a memory, indirectly calls a business LM, and allows the business LM to be replaced simultaneously with the change of the status of the business LM held in the management means (Patent Document) 1). *

Japanese Patent Laid-Open No. 11-85494

In Patent Document 1, the management means manages two names of the business LM at normal time and the business LM after switching and the state thereof on the shared memory of each transaction. By calling the business LM indirectly by referring to the name and status in the shared memory instead of calling directly, the business LM can be replaced even when the business LM is being used in a transaction.

However, when there are a plurality of threads in the business LM, the one disclosed in Patent Document 1 does not have a function for monitoring the state of each thread. Therefore, depending on the state of each thread, the business LM can be switched during execution of a transaction. Disappear.

The present invention has been made in view of the problems of the prior art described above, and its purpose is to provide a computer system capable of replacing a program even during execution of a transaction using the program, a program replacement method for the computer system, and a program replacement. To provide a processing program.

In order to achieve the object, the present invention provides a management for managing a processing state of the plurality of processing computers by exchanging information with the plurality of processing computers and the plurality of processing computers via a network. Each of the processing computers is in a state of a thread that uses a function call issuing unit that issues a function call and a function call target in the course of executing a program transaction. And a function call macro control unit for controlling the execution of the transaction, and a replacement control unit for replacing the program with a new program based on a control result of the function call macro control unit. The macro control unit, when the target of the function call is a replacement target and there is a thread that uses the replacement target, Complete the red process and continue the transaction that uses the replacement target. If there is no thread that uses the replacement target, temporarily suspend the execution of the transaction that uses the replacement target until the replacement of the replacement target is completed. It is characterized by doing.

According to the present invention, a program can be replaced even while a transaction using the program is being executed.

It is a block block diagram which shows the whole structure of a computer system. It is a conceptual diagram for demonstrating the process which suspends the function call in the replacement object library. It is a block diagram of the definition file in which library information is defined. It is a block diagram of a library management table. It is a block diagram for demonstrating the relationship between a library and a function call macro control part. It is a block diagram for demonstrating the processing content when managing the execution condition of a library. It is a flowchart for demonstrating the process of a replacement control part. It is a flowchart for demonstrating the processing content of a pre-processing part. It is a flowchart for demonstrating the processing content of a post-processing part. It is a block diagram of an AP server management table. It is a block diagram for demonstrating the library replacement instruction | indication to AP server by a load distribution system. It is a flowchart for demonstrating the processing content of a library replacement management part. It is a flowchart for demonstrating the processing content of a library execution condition notification part.

Embodiments will be described below with reference to the drawings.
<First embodiment>
In this embodiment, when the function call is issued, the function call macro control unit controls the execution of the transaction according to the state of the thread that uses the call target function that is the target of the function call. The program can be changed even during the execution of a transaction that uses.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing the overall configuration of a computer system to which the present invention is applied. In FIG. 1, the computer system is a system that operates 24 hours a day, 365 days, and includes

computers

101, 121, 131, 141, and the

computers

101, 121, 131, 141 are connected to each other via a network 151. Has been.

The

computers

101, 121, and 131 are configured as online system processing computers (processing computers) or application servers (AP servers), and the computer 141 is a load balancing system process that manages the load status of each of the

computers

101, 121, and 131. It is configured as a computer (management computer). Since the

computers

101, 121, and 131 are configured in the same manner, the following description will be made mainly using the computer 101 as the online system processing computer or application server (AP server).

The computer 101 includes a main storage device 102, a CPU (Central Processing Unit) 103, an auxiliary storage device 104, an input device 105 including a keyboard, and an output device 106 including a monitor. Stores an online system 107 and an operating system (OS) 108.

The online system 107 is a program that operates according to the operating system 108, and includes a library management unit 109 and a library group 110.

The library management unit 109 includes a replacement control unit 111, a library information management table 112, and a library execution status notification unit 113, and the library group 110 includes a plurality of libraries 114. Each library 114 includes a plurality of functions 115 and a function call macro control unit 116. Here, the library is a collection of functions, subroutines, data, etc. used in the application program.

The CPU 103 functions as a control unit that controls the entire computer 101 by operating the operating system 108 and the online system 107.

The auxiliary storage device 104 stores user data and various programs.

The input device 105 outputs information such as a replacement instruction to the replacement control unit 111 in response to a user operation.

The output device 106 displays the processing result of the CPU 103 and information for the user to input on the screen.

The computer 141 includes a CPU 142, a main storage device 143, and an auxiliary storage device 144. The main storage device 143 stores the load distribution system 145. The load distribution system 145 includes an AP (application) server library replacement management unit 146 and an AP server management table 147.

The CPU 142 performs overall control of the computer 141 and executes control for exchanging information with each

computer

101, 121, 131 via the network 151.

The AP server library replacement management unit 146 takes in information from each of the

computers

101, 121, and 131 via the network 151, and manages a library that is a replacement target of the library 114 in each of the

computers

101, 121, and 131. The AP server management table 147 stores information for managing whether or not the library in each AP server (each

computer

101, 121, 131) is a library to be replaced.

The auxiliary storage device 144 stores information related to the definition file defined by the user using the input device 105.

Next, FIG. 2 shows a conceptual diagram when the function call of the library to be replaced is put on hold.

In FIG. 2, in the process in which

transactions

211, 212, 213, and 214 are sequentially executed as transactions using an application program (business application program), the transaction 211 becomes a plurality of libraries 114, for example, library 114A and library 114D. , Library 114G, and if library 114H to be replaced does not exist among these libraries, transaction 211 is executed even if a function call occurs between the libraries (library 114A, library 114D, library 114G). The transaction 211 can be continued even if the replacement target library 114H is replaced with a new one.

On the other hand, the transaction 212 includes, for example, a library 114B, a library 114E, a library 114H, and a library 114J as a plurality of libraries 114. If the library 114H to be replaced exists in these libraries, the transaction 212 is changed. If a function call that causes a function belonging to the library 114E to call a function belonging to the library 114H occurs during execution, the function call is put on hold until the replacement of the replacement target library 114H is completed. In this case, the function call is temporarily suspended, but the replacement target library 114H can be replaced with a new one during execution of the transaction 212.

In addition, the transaction 213 includes, for example, a library 114C and a library 114F as a plurality of libraries 114. There is no library 114H to be replaced among these libraries, but among the functions belonging to the library 114F, If there is a function that calls a function belonging to the library 114H to be replaced, and a function call that calls a function belonging to the library 114H to be replaced occurs during execution of the transaction 213, the function call This is temporarily suspended until the replacement of the replacement target library 114H is completed. In this case, the function call is temporarily suspended, but the replacement target library 114H can be replaced with a new one during the execution of the transaction 213.

In addition, the transaction 214 includes, for example, a library 114C, a library 114F, and a library 114I as a plurality of libraries 114. Among these libraries, there is no library 114H to be replaced, and each library (library) 114C, library 114F, library 114I), when there is no function that calls a function belonging to the library 114H to be replaced, each library (library 114C, library 114F, library 114I) is being executed during the transaction 214. The transaction 214 can be continued even if a function call occurs between them, and the transaction 214 is continued even if the replacement target library 114H is replaced with a new one. Rukoto can.

Next, Fig. 3 shows the structure of the definition file. In FIG. 3, the definition file 131 includes information input by the user using the input device 105, for example.

In the definition file 131, for example, when the library A corresponding to the library 114 is composed of the function A1 and the function A2, the library name is defined as the library A, and the function names are defined as the function A1 and the function A2. When the library B corresponding to the library 114 is composed of the function B1 and the function B2, the library name is defined as the library B, and the function names are defined as the function B1 and the function B2, respectively. At this time, since the libraries A and B operate in cooperation with each other, the relationship between the libraries is also defined.

Next, FIG. 4 shows the configuration of the library management table. In FIG. 4, a library management table 112 is a table for managing the library 114, and includes a library name 401, a replacement instruction flag 402, a call count counter 403, and a function name 404. It consists of a thread number 405 and the number of calls 406.

In the entry 407 of the library name 401, “Library-_A” is stored as information related to the name of the library 114, for example, in the case of the library A corresponding to the library 114. In the entry of the replacement instruction flag 402, “ON” is stored as information of the replacement instruction flag 402 when the library 114 is a replacement target, and “OFF” is stored when the library 114 is not a replacement target. .

In the entry 409 of the thread number 405, when the library 114 includes a plurality of threads (multi-threads), a number corresponding to each thread (minimum unit of processing) is stored. The entry 410 of the number of calls 406 stores information indicating the number of times each thread has been called.

In the entry 411 of the function name 404, information on function names belonging to the library 114 specified by the library name 401 is stored. For example, when the library A corresponding to the library 114 is composed of functions A1 to An, “Function_A1” to “Function_An” are stored.

Next, FIG. 5 shows the relationship between the library and the function call macro control unit.

The function call macro control unit 116 is arranged for each library 114, and includes a pre-processing unit 501, a function calling unit 502, and a post-processing unit 503.

Here, for example, when the library A is the library 114A, the function 115 belonging to the library 114A is the function 115A, the library B is the library 114B, and the function 115 belonging to the library 114B is the function 115B, the preprocessing unit 501 In response to a function call for calling the function 115B from 115A, the function call unit 502 is instructed to call and a process for incrementing the number of calls is executed.

When the call target function instructed from the preprocessing unit 501 is the function 115B belonging to the library 114B, the function calling unit 502 calls the function 115B from the library 114B and outputs the function 115B to the postprocessing unit 503.

The post-processing unit 503 processes the function 115B called by the function calling unit 502 as the function 115A belonging to the library 114A, and executes a process for decrementing the call count counter.

Next, FIG. 6 shows a block diagram for explaining the processing contents for managing the execution status of the library.

In FIG. 6, when a function call for calling the function 115B is generated from the function 115A while the function 115A belonging to the library 114A is being processed, the preprocessing unit 501 sends the function call unit 502 to the library 114B. Instruct to call the function 115B to which it belongs, and increment the number of calls 406 in the number of calls counter 403 of the library management table 112 corresponding to the library 114B. For example, when the number of calls 406 of the thread # 1 is 0, 0 is changed to 1.

At this time, the CPU 103 functions as a processing unit that executes a transaction of an application program including a plurality of libraries, and also functions as a function call issuing unit that issues a function call.

Next, when the function to be called instructed from the pre-processing unit 501 is the function 115B belonging to the library 114B, the function calling unit 502 calls the function 115B from the library 114B and outputs it to the post-processing unit 503.

The post-processing unit 503 outputs the function 115B to the library 114A as a function belonging to the function 115A, and decrements the call count 406 in the call count counter 403. For example, when the number of calls 406 of the thread # 1 is 1, 1 is changed to 0.

Next, the processing content of the replacement control unit will be described with reference to the flowchart of FIG. First, the replacement control unit 111 executes processing for waiting for an online end or library replacement event (S701), determines whether or not there is an online end instruction (S702), and the online end instruction is input from the computer 141, for example. If it is determined, the processing in this routine is terminated, and if a library replacement instruction is input from the input device 105, information on the library management table 112 related to the specified replacement target library 114 is acquired. (S703).

Next, the replacement control unit 111 stores “ON” in the entry 408 of the replacement instruction flag 402 in the library management table 112 related to the replacement target library 114 (S704), and determines whether the library replacement is possible (S704). S705).

The replacement control unit 111 determines whether the values of the number-of-calls counter 403 of the library 114 to be replaced are all 0, that is, the values of all the entries 410 of the number of calls 406 are all 0 (the number of calls of all threads is 0). If all the call counts 406 are 0, it is assumed that there is no process for calling a function belonging to the replacement target library 114 in each thread, and the library replacement process is executed (S706).

Thereafter, the replacement control unit 111 notifies the AP server library replacement management unit 146 of the completion of replacement via the network 151 (S707), and notifies the waiting pre-processing unit 501 that the replacement has been completed (S708). ), “OFF” is stored in the entry 408 of the replacement instruction flag 402 of the library management table 112 (S709), and the process returns to step S701 again.

On the other hand, if it is determined in step S705 that the library 114 cannot be replaced, among the functions that need to call the functions belonging to the replacement target library 114, there are threads that have not been processed, Since the number of thread calls is not 0, the process waits until the number of calls 406 of all threads becomes 0 (S710). Thereafter, the replacement control unit 111 proceeds to the process of step S706 on the condition that the number of calls 406 of all threads is zero.

Next, the processing contents of the preprocessing unit will be described with reference to the flowchart of FIG.

First, the preprocessing unit 501 of the function call macro control unit 116 starts processing in response to a function call from the function 115 and acquires information of the library management table 112 based on the function name added to the function call. Then, it is determined whether “OFF” is stored in the entry 408 of the replacement instruction flag 402 in the information of the acquired library management table 112 (S802).

Next, when the replacement instruction flag 402 related to the library 114 to be called is “ON”, the preprocessing unit 501 determines that the library 114 to be called is the replacement target library 114 and belongs to this library 114. Whether or not the number of calls of the own thread (hereinafter, among the plurality of threads related to the library 114, the thread currently being processed is called the own thread and the other threads are called other threads) is 1 or more. Is determined (S803).

If it is determined in step S803 that the number of calls of the own thread is not 1 or more but 0, the preprocessing unit 501 executes a process of waiting until a notification of replacement completion is received from the replacement control unit 111 (S804). Thereafter, the processing returns to step S802, and the processing of steps S802 to S803 is repeated.

On the other hand, if it is determined in step S803 that the number of calls of the own thread is 1 or more, the preprocessing unit 501 increments the number of calls of the own thread, for example, sets the number of calls 406 to +1 (S805). Terminate the process.

When the number of calls of the own thread is 1 or more, there is a thread that belongs to a function for calling a function that belongs to the call target library 114. Thereafter, a function call (function that belongs to the call target library 114) is performed by the function call unit 502. Function call for calling.

If it is determined in step S802 that the replacement instruction flag 402 is “OFF”, that is, if it is determined that the call target library 114 is not the replacement target library 114, the preprocessing unit 501 performs the process in step S805. Processing will be executed.

When the replacement instruction flag 402 is “OFF”, a function call (a function call for calling a function belonging to the call target library 114) is subsequently performed by the function calling unit 502 without determining the number of calls 406 of the own thread. Will be executed.

Next, the processing content of the post-processing unit will be described with reference to the flowchart of FIG.

The post-processing unit 503 of the function call macro control unit 116 starts the process on condition that the function call unit 502 executes the process for calling the function, and stores the function in the library management table 112 corresponding to the call target library 114. It is determined whether or not “ON” is stored in the entry 408 of the replacement instruction flag 402 (S901). If the replacement instruction flag 402 is “ON”, the call target library 114 is replaced with the replacement target library 114. It is determined that the number of calls of the own thread is 1 (S902).

If it is determined in step S902 that the number of calls 406 of the own thread is 1, the post-processing unit 503 determines whether the number of calls 406 of all other threads is 0 (S903).

If it is determined in step S903 that the number of calls 406 of all other threads is 0, the number of calls 406 of the own thread is decremented, for example, the number of calls 406 is set to -1 (S904), and the waiting replacement is performed. Information indicating that the number of calls of all threads is 0 and replacement is possible is sent to the control unit 111 (S905), and the processing in this routine is terminated.

That is, when the number of calls 406 of the own thread is 0 and the number of calls 406 of all other threads is 0, there is no thread that uses a function belonging to the call target library 114 as a call target function. The processing unit 503 notifies the standby switching control unit 111 of information indicating that the number of calls of all threads is 0 and switching is possible.

On the other hand, if “NO” is determined in each of steps S901, S902, and S903, the post-processing unit 503 determines that the call target library 114 is not the replacement target library 114 (S901) or the number of calls 406 of its own thread. Is not 1 (2 or more) (S902), and the call count 406 of another thread is not 0 (S903), the call count 406 of the own thread is decremented, for example, the call count 406 is set to -1. (S906), and the processing in this routine is terminated.

In this embodiment, when the function 115A belonging to the library 114A needs to call the function 115B belonging to the other library 114B and a function call is issued, the function call macro control unit 116 is a target of the function call. The library 114B determines whether or not it is a replacement target library. If it is determined that the library 114B that is the target of the function call is a replacement target library, is there a thread that uses the call target function 115B belonging to the replacement target library? If it is determined that there is a thread using the call target function 115B, the execution of the transaction using the replacement target library is continued until the processing of all threads using the call target function 115B is completed. There is a thread that uses the target function 115B If it is determined that there is not, the execution of the transaction using the replacement target library is temporarily suspended until the replacement of the replacement target library is completed.

At this time, the replacement control unit 111 replaces the replacement target library with a new library on condition that the processing of all threads using the call target function 115B is completed.

According to this embodiment, the application program can be replaced without stopping the online system 107 in the computer system operating for 24 hours and 365 days.

Further, according to the present embodiment, the application program can be replaced even if a transaction is executed for a long time.

(Second embodiment)
In this embodiment, the computer 141 manages the load state of each of the

computers

101, 121, and 131. When the library is replaced, the computer with the lowest load is instructed to replace the library, and the instructed computer Thus, the library is replaced, and the configuration of the computer system is the same as that of the first embodiment.

Next, FIG. 10 shows the configuration of the AP server management table. In FIG. 10, the AP server management table 147 includes a library name 901, a replacement instruction flag 902, and a total call count counter storage location 903.

Each library name 901 entry stores information on the library name. For example, “Library_A” is stored in the entry 904 as the name of the library A, and “Library_Z” is stored in the entry 905 as the name of the library Z.

In each entry of the replacement instruction flag 902, “ON” is stored when the library 114 is a library to be replaced, and “OFF” is stored when the library 114 is a library that is not a replacement target. Is done. For example, “ON” is stored in the entry 904 as the replacement target library, and “OFF” is stored in the entry 905 as the library Z is not the replacement target library.

Information indicating the storage location of each library 114 is stored in each entry of the total call counter storage location 903.

For example, the entry 904 stores “storage destination address_A” as the storage destination address of the library A, and the entry 905 stores “storage destination address_Z” as the storage destination address of the library Z. .

Each storage destination address includes an AP server name 911, a total call count counter 912, and a replacement completion flag 913.

The AP server name 911 entry stores information about the AP server name. For example, “AP server_1” is stored as the AP server name of the computer 101 in the entry 914, and “AP server_n” is stored as the AP server name of the n computers in the entry 915.

In the entry of the total number of calls counter 912, information on the number of times the library used in each AP server has been called is stored as a numerical value. For example, the entry 914 stores “1” when the number of calls of the library A used by the computer 101 is 1, and the entry 915 stores “1” when the number of calls of the library Z used by the n computers is 0. “0” is stored.

Each entry of the replacement completion flag 913 stores “ON” when the replacement of the library is completed as information indicating whether or not the replacement of the library used in each AP server is completed. If the process is not completed, “OFF” is stored. For example, the entry 914 stores “OFF” as the replacement of the library A as the # 1 AP server is not completed, and the entry 915 completes the replacement of the library A for the #n AP server. “OFF” is stored as not being performed.

Next, FIG. 11 shows a block diagram for explaining the processing contents of a library replacement instruction from the load balancing system to the AP server.

In FIG. 11, when the AP server library replacement management unit 146 of the computer 141 receives a library A replacement instruction (A1101) from the input device 105, the AP server library replacement management unit 146 selects each AP server (each computer 101, each

computer

101, 121, 131), the AP server management table 147 corresponding to the library A is searched (A1102), and the AP server having the lowest load is, for example, the total call count counter 912 for the library A. Information is acquired, and “AP server — 3” having the lowest value of the total call counter 912 is selected as the AP server with the lowest load.

When the computer 131 is selected as the AP server with the lowest load, the AP server library replacement management unit 146 instructs the replacement control unit 111 of the computer 131 to replace the library A (A1103).

That is, the library A is exchanged from the input device 105 to the AP server library exchange management unit 146 of the computer 141 while each

computer

101, 121, 131 is executing a transaction including the library A to be replaced. When there is an instruction, the AP server library replacement management unit 146 instructs the replacement control unit 111 of the computer 131 with the lowest load to replace the library A, so that the replacement control unit 111 of the computer 131 The library A can be replaced while the execution of the transaction including the library A to be replaced is temporarily suspended. The

other computers

101 and 121 can perform the transaction including the library A to be replaced without stopping the service. Can continue.

Next, the processing contents of the AP server library replacement management table 146 in the computer 141 will be described with reference to the flowchart of FIG.

The AP server library replacement management unit 146 executes online termination, library replacement, or execution status notification event waiting processing (S1201), and whether any of the

computers

101, 121, 131 has received an online termination instruction. (S1202), if there is an online termination instruction from any of the computers, the processing in this routine is terminated. If it is determined that there is no online termination instruction, there is a library replacement instruction. It is determined whether or not (S1203).

If it is determined in S1203 that there is a library replacement instruction, the AP server library replacement management unit 146 refers to the AP server management table 147 based on the information (the library name of the replacement target library) added to the library replacement instruction, and performs replacement. A target library, for example, library A is identified (S1204), and “ON” is written in the entry of the replacement instruction flag 902 of the replacement target library on the AP server management table 147 (S1205).

Next, in the AP server management table 147, the AP server library replacement management unit 146 selects the AP server name 911 having the smallest value of the total call count counter 912 with the replacement completion flag 913 being “OFF” and having the highest load. It is acquired as a lower AP server name (S1206), and it is determined whether or not the AP server name has been acquired (S1207).

If it is determined in step S1207 that the AP server name has been acquired, the AP server library replacement management unit 146 sets the AP server corresponding to the acquired AP server name as the processing target AP server, and sends it to the replacement control unit 111 of the AP server. An exchange is instructed (S1208). For example, when the total call counter 912 of the # 3 AP server has the smallest value, the AP server library replacement management unit 146 selects the computer 131 as the processing target AP server with the lowest load, and the computer The exchange control unit 111 of 131 is instructed to exchange the library A.

Next, the AP server library replacement management unit 146 performs processing of waiting for replacement completion from the replacement management unit 111 of the processing target AP server (S1209), and the replacement management unit 111 notifies, for example, completion of replacement of the library A. On the condition that there is, “ON” is written in the entry of the replacement completion flag 913 corresponding to the processing target AP server in the AP server management table 147 (S1210). For example, the AP server library replacement management unit 146 writes “ON” in the entry 916 corresponding to the computer 131 in the replacement completion flag 913.

Thereafter, the AP server library replacement management unit 146 returns to step S1206 and repeats the processing of S1206 to S1212.

On the other hand, if it is determined in S1207 that the server name cannot be acquired, the AP server library replacement management unit 146 determines that the replacement of the library A has been completed, and the entry of the replacement completion flag 913 of all AP servers in the AP server management table 147 is completed. "OFF" is written to each of them (S1211), and "OFF" is written to the entry 904 corresponding to the library A among the entries of the replacement instruction flag 902 of the AP server management table 147, and then the processing returns to the step S1201. The processes in steps S1201 to S1212 are repeated.

If it is determined in step S1203 that the instruction is not a library replacement instruction, the AP server library replacement management unit 146 refers to the AP server management table 147 as a library execution status notification instruction, and determines the replacement target library in the AP server management table 147. The total number-of-calls counter 912 is updated (S1213), and then the process returns to step S1201 to repeat the processes of steps S1201 to S1213.

In the process of executing the transaction including the replacement target library A in each of the

computers

101, 121, 131, when there is an instruction to replace the library A, the AP server library replacement management unit 146 has the lowest load. By instructing the replacement control unit 111 of the computer 131 to replace the library A, the replacement control unit 111 of the computer 131 replaces the library A in a state where the execution of the transaction including the library A to be replaced is temporarily suspended. The

other computers

101 and 121 can continue the transaction including the library A to be replaced without stopping the service.

Next, the processing contents of the library execution status notification unit will be described with reference to the flowchart of FIG.

The library execution status notifying unit 113 is activated at a user-specified interval, for example, at an interval of 10 seconds (S1301), and the information on the call count counter 403 in the library management table 112 is replaced with the AP server library of the computer 141 via the network 151. The management unit 146 is notified (S1302), and it is determined whether or not there is an online termination instruction from the computer 141 (S1303). If there is an online termination instruction, the processing in this routine is terminated and an online termination instruction is issued. If it is determined that there is not, the processes in steps S1301 to S1303 are repeated.

Thereby, the library execution status notification unit 113 can notify the AP server library replacement management unit 146 of the information on the number of calls 403 in the library management table 112 at intervals of 10 seconds.

In this embodiment, when replacing the application program used in the

computers

101, 121, 131, the computer 141 selects the computer 131 having the lowest load among the

computers

101, 121, 131, and the replacement control unit 111 of the selected computer 131. The function call macro control unit 116 belonging to the computer 131 instructed to replace the application program temporarily suspends execution of the transaction of the application program, and the replacement control unit 111 belonging to the computer 131 The application program is replaced on condition that the execution of the application program transaction is temporarily suspended.

On the other hand, the function call macro control unit 116 belonging to the

other computers

101 and 121 not instructed to replace the application program continues to execute the transaction of the application program without stopping the service.

According to the present embodiment, in a computer system operating for 24 hours and 365 days, the application program can be replaced without stopping the online system 107 or service at all.

In addition, this invention is not limited to the above-mentioned Example, Various modifications are included. For example, the above-described embodiments have been described in detail for easy understanding of the present invention, and are not necessarily limited to those having all the configurations described. Further, a part of the configuration of one embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of one embodiment. Further, it is possible to add, delete, and replace other configurations for a part of the configuration of each embodiment.

Each of the above-described configurations, functions, processing units, processing means, and the like may be realized by hardware by designing a part or all of them with, for example, an integrated circuit. Each of the above-described configurations, functions, and the like may be realized by software by interpreting and executing a program that realizes each function by the processor. Information such as programs, tables, and files that realize each function is stored in memory, a hard disk, a recording device such as an SSD (Solid State Drive), an IC (Integrated Circuit) card, an SD (Secure Digital) memory card, a DVD ( It can be recorded on a recording medium such as Digital Versatile Disc).

101, 121, 131, 141 computer, 102 main storage device, 103 CPU, 104 auxiliary storage device, 105 input device, 106 output device, 107 online system, 108 operating system, 109 library management unit, 110 library group, 111 replacement control Part, 112 library management table, 113 library execution status notifying part, 114 library, 115 function, 116 function call macro control part, 142 CPU, 143 main storage device, 144 auxiliary storage device, 145 load distribution system, 146 AP server library Replacement management unit, 147 AP server management table.

Claims

A computer system comprising a plurality of processing computers, and a management computer that manages the processing state of the plurality of processing computers by exchanging information with the plurality of processing computers via a network,
Each of the processing computers is
In the course of executing a program transaction, a function call issuing unit that issues a function call, a macro control unit that controls the execution of the transaction according to the state of a thread that uses the target of the function call, and the macro control unit A computer system comprising: an exchange control unit for exchanging the program with a new program based on the control result.
The computer system according to claim 1,
When the management computer replaces the program used by the plurality of processing computers, the management computer selects the processing computer having the lowest load from the plurality of processing computers, and replaces the program with the selected processing computer. Instruct
The macro control unit belonging to the processing computer instructed to replace the program among the plurality of processing computers temporarily suspends execution of the transaction of the program, and the processing computer instructed to replace the program The replacement control unit to which the replacement control unit executes the replacement of the program on the condition that the execution of the transaction of the program is temporarily suspended, and is used for other processing that is not instructed to replace the program among the plurality of processing computers The computer system according to claim 1, wherein the macro control unit belonging to the computer continues to execute the transaction of the program.
The computer system according to claim 2,
The macro control unit belonging to the processing computer instructed to replace the program is subject to the condition that the replacement control unit belonging to the processing computer instructed to replace the program has completed the replacement of the program. A computer system that resumes execution of a transaction of the program that has been temporarily suspended.
The computer system according to claim 2,
The plurality of processing computers have a notification unit that notifies the management computer of the load state of each processing computer via the network.
The computer system according to any one of claims 1, 2, 3, and 4,
The program is composed of a plurality of libraries, each of the plurality of libraries is composed of a plurality of functions,
The function call issuing unit is configured to execute the function call when a function belonging to any one of the plurality of libraries uses a function belonging to another library in a process of executing a transaction of a program including the plurality of libraries. The macro control unit controls execution of the transaction according to a state of a thread that uses the call target function that is a target of the function call, and the replacement control unit is a control result of the macro control unit. A computer system characterized in that a replacement target library is replaced with a new library among the plurality of libraries.
The computer system according to claim 5,
The function call issuing unit, when a function belonging to any one of the plurality of libraries needs to call a function belonging to another library as a call target function, calls a function call for calling the call target function When the function call is issued from the function call issuing unit, the macro control unit determines whether the library that is the target of the function call is a replacement target library, and the target of the function call When it is determined that the library to be replaced is the replacement target library, it is determined whether there is a thread that uses the call target function belonging to the replacement target library, and a determination result of whether the thread exists Continue to execute the transaction that uses the replacement target library based on the Computer system, characterized in that the replacement of elephants library to complete, temporarily holds the execution of transactions utilizing the replacement target library.
The computer system according to claim 6,
When the macro control unit determines that there is a thread that uses the call target function, the macro control unit continues execution of the transaction that uses the replacement target library until processing of all the threads that use the call target function is completed, When it is determined that there is no thread that uses the call target function, the execution of the transaction using the replacement target library is temporarily suspended until the replacement of the replacement target library is completed, and the replacement control unit A computer system characterized in that the replacement object library is replaced with a new library on condition that processing of all threads using the function is completed.
The computer system according to claim 7,
When the processing of all threads using the call target function is completed, the macro control unit notifies the replacement control unit that the processing of all threads using the call target function is completed. Computer system.
The computer system according to claim 6,
When the macro control unit determines that the library that is the target of the function call is not the replacement target library, the macro control unit calls the function belonging to the library that is the target of the function call from the call target function, and uses the call function A computer system characterized by executing processing of a thread to execute and executing the transaction.
A plurality of processing computers; and a management computer that manages the processing state of the plurality of processing computers by exchanging information with the plurality of processing computers via a network, and each of the processing computers A function call issuing unit that issues a function call in a process of executing a program transaction, a macro control unit that controls execution of the transaction according to a state of a thread that uses a target of the function call, and the macro A computer system program replacement method comprising a replacement control unit that replaces the program with a new program based on the control result of the control unit,
When the management computer replaces the program used in the plurality of processing computers, selecting the processing computer with the lowest load among the plurality of processing computers;
The management computer instructing the selected processing computer to replace the program;
The macro control unit belonging to the processing computer instructed to replace the program among the plurality of processing computers, temporarily suspending execution of the transaction of the program;
The replacement control unit belonging to the processing computer instructed to replace the program executes the replacement of the program on the condition that execution of the transaction of the program is temporarily suspended; and
The macro control unit belonging to another processing computer that is not instructed to replace the program among the plurality of processing computers, and the step of continuing execution of the transaction of the program, Program replacement method.
A computer system program replacement method according to claim 10, comprising:
The macro control unit belonging to the processing computer instructed to replace the program is subject to the condition that the replacement control unit belonging to the processing computer instructed to replace the program has completed the replacement of the program. A program replacement method for a computer system, comprising the step of resuming execution of a transaction of the program that has been temporarily suspended.
A computer system program replacement method according to claim 10, comprising:
The program is composed of a plurality of libraries, each of the plurality of libraries is composed of a plurality of functions,
If the function belonging to one of the plurality of libraries uses a function belonging to another library in the process of executing a transaction of a program including the plurality of libraries, the function call issuing unit A step of issuing
The macro control unit controls execution of the transaction according to a state of a thread that uses a function to be called that is a target of the function call;
A program replacement method for a computer system, comprising: a step of replacing the replacement target library with a new library among the plurality of libraries based on a control result of the macro control unit.
A computer system program replacement method according to claim 12, comprising:
If the function call issuing unit needs to call a function belonging to one of the plurality of libraries as a call target function, a function call for calling the call target function is generated. Issuing step;
When the macro control unit issues the function call from the function call issuing unit, determining whether the library that is the target of the function call is a replacement target library;
When the macro control unit determines that the library that is the target of the function call is the replacement target library, a step of determining whether or not there is a thread that uses the call target function belonging to the replacement target library When,
The replacement target library until the macro control unit continues execution of a transaction using the replacement target library based on a determination result of whether or not the thread exists or until the replacement of the replacement target library is completed. A program replacement method for a computer system, comprising: temporarily suspending execution of a transaction that uses a computer.
A computer system program replacement method according to claim 13,
When the macro control unit determines that there is a thread that uses the call target function, the step of continuing the execution of the transaction that uses the replacement target library until the processing of all the threads that use the call target function is completed. When,
If the macro control unit determines that there is no thread using the call target function, temporarily suspending execution of a transaction using the replacement target library until the replacement target library is completely replaced;
The replacement control unit includes a step of replacing the replacement target library with a new library on condition that the processing of all threads using the call target function is completed. Method.
A computer system program replacement method according to claim 12, comprising:
When the macro control unit determines that the library that is the target of the function call is not the replacement target library, a step of calling a function belonging to the library that is the target of the function call from the call target function;
A program replacement method for a computer system, comprising: a step of executing processing of a thread that uses the calling function, and executing the transaction.
Program replacement for realizing a function in each of a plurality of processing computers and a management computer for exchanging information with the plurality of processing computers via a network and managing a processing state of the plurality of processing computers A processing program,
In each processing computer,
A function that issues a function call in the course of executing a program transaction;
A function for controlling the execution of the transaction according to the state of a thread that uses the target of the function call;
A function of replacing the program with a new program based on the control result;
Realized,
In the management computer,
A function of selecting a processing computer having the lowest load among the plurality of processing computers;
A function for instructing the selected processing computer to replace the program;
Realized,
To the processing computer instructed to replace the program,
A function to temporarily suspend execution of a transaction of the program;
A function of executing replacement of the program on condition that execution of the transaction of the program is temporarily suspended;
Realized,
To other processing computers not instructed to replace the program,
A program replacement processing program for realizing a function of continuing execution of a transaction of the program.