JP2011118522A - Server device and method of controlling the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To propose a server system with which the processing efficiency can be dramatically improved. <P>SOLUTION: The server device includes: a first control part which calls a loaded library from a called library storage area for storing the loaded libraries and processes a request from a client device; and a second control part which loads a new library to a storage area different from the called library storage area asynchronously with the first control part. The first control part sets the storage area for the new library to the called library storage area when the new library is loaded in the second control part. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a server device that is required to operate for a long time and a control method thereof.

  Conventionally, in a system that is required to operate for 24 hours, a method of dynamically replacing an application library called by an application program (Application Program: AP) is required in order to shorten a processing request reception stop time from a client device. Become.

  In particular, in a large-scale system, the number of application programs increases and the number of application libraries that need to be replaced also increases. Therefore, it is desirable to shorten the replacement processing time as much as possible to shorten the transaction delay time. .

  For example, as a system for dynamically replacing an application library, a data processing apparatus described in Patent Document 1 below is disclosed. In other words, the data processing apparatus described in Patent Document 1 does not process a processing thread (replacement unnecessary processing thread) that can process a message using a currently prepared application library among processing threads of a multi-thread system configuration. Let the process do. On the other hand, for a processing thread that requires replacement of the application library, the data processing apparatus performs processing for reading the replacement application library in parallel in time when the replacement-unnecessary processing thread is processing a message. Make it.

JP 2006-277047 A

  Conventionally, as shown in FIG. 6, after the last transaction before execution of the replacement process is completed, the application library used until then is unloaded and a new application library is loaded. After the creation of the information to call was completed, the transaction was resumed using a new application library.

  For this reason, in a large-scale system in which a large number of application libraries are used, when replacing a large number of application libraries, there is a problem that the replacement process of the application library becomes long, resulting in a long transaction delay time. .

  The data processing device described in Patent Document 1 also has a problem similar to that described above because the processing thread that needs to be replaced stops receiving processing requests during the replacement process.

  The present invention has been made in consideration of the above points, and proposes a server apparatus and a control method thereof that can significantly improve the processing efficiency.

  In order to solve such a problem, the present invention provides a first control unit that is a server device, calls a library from a call library storage area that stores a library that has been loaded, and processes a request from a client device. A second control unit that loads a new library into a storage area different from the call library storage area asynchronously with the first control unit, wherein the first control unit includes the second control unit When the loading of the new library is completed, the storage area of the new library is set as the calling library storage area.

  The present invention is also a control method for a server device, wherein a first control unit calls a library from a call library storage area that stores a library that has been loaded, and processes a request from a client device. And a second step of loading a new library into a storage area different from the call library storage area asynchronously with the first control section. In the step, when loading of the new library in the second step is completed, the storage area of the new library is set as the call library storage area.

  Accordingly, a dedicated second control unit for loading the library is prepared, and the library is loaded asynchronously with the first control unit that calls the library, so that the reception of the processing request from the client device is not stopped. It is possible to replace the library dynamically.

  ADVANTAGE OF THE INVENTION According to this invention, the server apparatus which can improve processing efficiency markedly, and its control method are realizable.

It is an example of the block diagram which shows the hardware constitutions of an application server. It is an example of the block diagram which shows the functional structure of an application server. It is an example of the flowchart which shows the control procedure of an application server. It is an example of the conceptual diagram which shows the structure of the library information for own processes. It is an example of the conceptual diagram which shows the structure of generation information. It is an example of the flowchart which shows the control procedure of the conventional application server.

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

  FIG. 1 is a diagram illustrating a hardware configuration of the application server 1. The application server 1 (server device) includes, for example, a CPU (Central Processing Unit) 2, a ROM (Read Only Memory) 3 coupled to the CPU 2, a RAM (Random Access Memory) 4, a storage unit 5, an input unit 6, a display The same hardware as that of a normal computer device such as the unit 7 and the input / output interface 8 is provided. Here, for example, the storage unit 5 is an external storage device such as an HDD (Hard Disk Drive).

  The application server 1 may physically be either a dedicated system or a general-purpose information processing apparatus. For example, in an information processing apparatus having a general configuration, each process in the application server 1 of the present invention can be realized by calling an application program that performs a specified process.

  FIG. 2 is a diagram illustrating a functional configuration of the application server 1. Functionally, the application server 1 includes at least a processing request execution thread 11 (first control unit), a load processing execution thread 12 (second control unit), and an application dynamic replacement unit 13. The processing request execution thread 11, the load processing execution thread 12, and the application dynamic replacement unit 13 can be realized mainly by the CPU 2 calling a program stored in the ROM 3 or the RAM 4 and controlling each hardware.

  Further, the application server 1 includes an application dynamic replacement target library DB (Database) 14, own process library information 15, an entire library information management table 16, and generation information 17. Furthermore, the application server 1 has a storage area 18 for storing an application library, and the storage area 18 includes at least two library storage areas 18A and 18B.

  The application dynamic replacement target library DB 14 is configured using, for example, the storage unit 5. The own process library information 15, the entire library information management table 16 and the generation information 17 are stored in the RAM 4, for example. The storage area 18 is configured using the RAM 4.

  When the processing request execution thread 11 receives the processing request from the client device 19, it calls the function of the corresponding application library from the calling library storage area of the storage area 18, processes the processing request, and responds to the client device 19 after processing. To do. The call library storage area is an area for storing an application library (library) that is called by the processing request execution thread 11, and one of the library storage areas 18A and 18B is set as the call library storage area.

  As an initial setting, the load processing execution thread 12 loads an application library necessary for calling a function of the application library from the application dynamic replacement target library DB 14 to one of the library storage areas 18A and 18B, and stores it in the call library storage area. Set. In addition, as a dynamic replacement process, the load process execution thread 12 is asynchronous with the process request execution thread 11 and creates a new application library in an area different from the call library storage area in the storage area 18 in the library storage areas 18A and 18B. To load. When the loading of the new application library is completed in the load processing execution thread 12, the processing request execution thread 11 sets the new application library storage area as the call library storage area. On the other hand, the load processing execution thread 12 unloads the old application library (the application library that the processing request execution thread 11 has called before the setting) after the storage area of the new library is set as the calling library storage area. .

  The application program is a program designed for a specific purpose and performing a specific process. An application library is a program (function) having a specific function that is divided into parts that can be used by other programs (application programs), and a plurality of programs are collected into one file. The application library itself cannot be called alone, and, for example, operates as a part thereof when called by an application program. Loading means reading data, programs, application libraries, and the like stored in the external storage device into a main memory such as the RAM 4. Unloading means deleting data, a program, an application library, etc. expanded in the main memory and releasing the area.

  The application dynamic replacement unit 13 refers to the application dynamic replacement target library DB 14 and expands the library information in the entire library information management table 16. The self-process library information 15 is configured by extracting library information necessary for the processing request execution thread 11 from the all library information management table 16. The own process library information 15 is created by the load process execution thread 12.

  The generation information 17 is information for switching the setting of the calling library storage area. The generation information 17 includes call generation information indicating how many times the application library that the processing request execution thread 11 calls is the application library acquired from the activation of the load processing execution thread 12, and the load processing execution thread 12. The loaded application library is configured to include load generation information indicating how many times the load processing execution thread 12 has started the load processing execution thread 12 to obtain the library.

  As will be described later, the load processing execution thread 12 updates the load generation information when loading of a new application library is completed, while the processing request execution thread 11 has different call generation information and load generation information. The call generation information is updated to be the same as the load generation information, and a new application library storage area is set as the call library storage area.

  Next, the operation of the application server 1 will be described with reference to FIGS.

  Stages (a) and (b) are stages before execution of request processing.

  (A) The load process execution thread 12 refers to the all library information management table 16 at the time of activation, and loads the application library related to the process request execution thread 11 from the list of application libraries in the all library information management table 16 with the load generation number “ As an application library of “1”, for example, it is loaded into the library storage area 18A, the library storage area 18A is set as the calling library storage area, and the library information 15 for the own process with the load generation number “1” is created.

  Here, FIG. 4 is a diagram illustrating the configuration of the library information 15 for the own process. The own process library information 15 manages the load generation number, function name, function address, and library file (storage destination, library name) of the application library.

  FIG. 5 is a diagram illustrating a configuration of the generation information 17. The generation information 17 includes a call generation (call generation information) indicating a generation number of an application library for which the processing request execution thread 11 calls a function of the application library, and an application library in which the load processing execution thread 12 has completed loading of the application library. To manage the load generation (load generation information) that represents the generation number.

  (B) The load processing execution thread 12 creates the generation information 17 at the time of activation, and initializes the call generation of the generation information 17 as the call generation number “1” and the load generation as the load generation number “1”.

  Step (c) is a step before execution of the dynamic replacement process.

  (C) When receiving the processing request from the client device 19, the processing request execution thread 11 compares the load generation number of the generation information 17 with the call generation number. Since the call generation number and the load generation number are the same, the processing request execution thread 11 calls the corresponding function in the application library of the call generation of the generation information 17 from the call library storage area, and receives a processing request from the client device 19. Process.

  Stages (d) to (h) are stages during execution of the dynamic replacement process.

  (D) The application dynamic replacement unit 13 refers to the application dynamic replacement target library DB 14, updates the contents of the entire library information management table 16, and issues a replacement processing request to the load processing execution thread 12. Since this process is described in, for example, Japanese Patent Laid-Open No. 2005-157536, it will not be described in detail here.

  (E) The load process execution thread 12 refers to the entire library information management table 16 and acquires information on the application library related to the process request execution thread 11 from the list of application libraries. To the information of the application library with the load generation number “2”.

  (F) For the application library with the load generation number “2”, for example, the load processing execution thread 12 stores, for example, a call library storage area in which the already loaded application library with the load generation number “1” is stored (here, The data is loaded into a library storage area 18B different from the library storage area 18A).

  (G) When the processing request execution thread 11 receives a processing request from the client device 19 while executing (d) to (f), the processing request execution thread 11 compares the load generation number of the generation information 17 with the call generation number. In steps (d) to (f), since the load generation number and the call generation number of the generation information 17 match, the application in the call library storage area (here, the library storage area 18A) is the same as before the replacement process. A corresponding function of the library is called to process a processing request from the client device 19.

  (H) On the other hand, when the loading of the application library with the load generation number “2” is completed, the load processing execution thread 12 updates the load generation of the generation information 17 to the load generation number “2”. Thereby, the dynamic replacement process is completed.

  Stages (i) and (j) are stages after execution of the dynamic replacement process.

  (I) When the processing request execution thread 11 receives a processing request from the client device 19 after completing (h), the processing request execution thread 11 compares the load generation number of the generation information 17 with the call generation number. In stage (h), the load generation number of the generation information 17 is different from the call generation number, that is, the load generation number of the generation information 17 is larger than the call generation number. The library storage area 18B of the library is set as the call library storage area, and the call generation number of the generation information 17 is updated to “2”, which is the same as the load generation number. As a result, the function corresponding to the application library with the load generation number “2” is subsequently called to process the processing request from the client device 19.

  (J) After detecting that the call generation number of the generation information 17 is “2”, the load process execution thread 12 stores the application library that is no longer necessary after replacement, that is, the process request execution thread 11 stores the call library. Unload the library (application library stored in the library storage area 18A) that was called before setting the area. Hereinafter, similarly, the application server 1 repeats the processes of steps (c) to (j) depending on the situation.

  In this way, when the application server 1 operates the process request execution thread 11 and the load process execution thread 12 asynchronously and loads a new application library, the application server 1 corresponds to the already loaded application library. A function is called to process a processing request from the client device 19.

  In addition, when the loading of the new application library is completed, the application server 1 sets the new application library storage area as the call library storage area, calls the function corresponding to the new application library, and calls from the client device 19. Process the processing request.

  Then, the application server 1 unloads the already loaded application library after the loading of the new application library is completed and the storage area of the new application library is set as the calling library storage area.

  With the above processing, the application server 1 can dynamically replace the application library without stopping the processing request from the client device 19.

  As an effect of the present invention, the application server 1 can shorten the stop time of the reception process from the client device even when it is necessary to replace a large amount of application libraries.

  The present invention is effective in a case where a large-scale system that operates for 24 hours performs a function addition or bug correction of a large number of application libraries without stopping a reception process from a client device.

DESCRIPTION OF SYMBOLS 1 ... Application server, 2 ... CPU, 3 ... ROM, 4 ... RAM, 5 ... Memory | storage part, 6 ... Input part, 7 ... Display part, 8 ... I / O interface, 11 ... Processing Request execution thread, 12... Load processing execution thread, 13... Dynamic application replacement means, 14... Application dynamic replacement library, 15... Library information for own process, 16. ... Generation information, 18 ... Storage area, 19 ... Client device

Claims (4)

A first controller that calls a library from a call library storage area that stores a library that has been loaded, and processes a request from a client device;
A second controller that loads a new library into a storage area different from the call library storage area asynchronously with the first controller;
The first controller is
When the loading of the new library is completed in the second control unit, the storage area of the new library is set as the calling library storage area. The second controller is
The server apparatus according to claim 1, wherein after the setting by the first control unit is completed, the library that the first control unit has called up before the setting is unloaded. The second controller is
Call generation information indicating how many times the first control unit calls the library acquired by starting the second control unit, and the library that has been loaded by the second control unit Is generated generation information including load generation information indicating the library acquired by the load processing of the second time from the start of the second control unit,
When loading of the new library is completed, the load generation information is updated,
The first controller is
If the call generation information is different from the load generation information, the call generation information is updated to be the same as the load generation information, and the storage area of the new library is set as the call library storage area. The server device according to claim 1, wherein: A server device control method comprising:
A first step in which a first control unit calls a library from a call library storage area that stores a library that has been loaded, and processes a request from a client device;
A second step of loading a new library into a storage area different from the calling library storage area asynchronously with the first control section;
In the first step,
When the loading of the new library in the second step is completed, the storage area of the new library is set as the calling library storage area.

Images