JP2015043178A - Information processing device, information processing method, and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a technique for efficiently updating data.SOLUTION: An information processing device comprises: determination means that during execution of management means which manages update of data, determines a management system of the management means for each processing unit; creation means that creates history information related to the management for each processing unit using the management system determined by the determination means; and recording means that records the history information created by the creation means in a storage area for each processing unit.

Description

  The present invention relates to an information processing apparatus, an information processing method, and a program.

If an abnormal event such as a power interruption or removal of a storage medium occurs during a file operation on the storage device, consistency between the information for managing the file and the contents of the file may not be achieved. In a file system with a journaling function (hereinafter referred to as a journaling file system), the update history is retained as a journal log in the secondary storage device, thereby reducing the risk of such a failure. The update history includes operation history of files, difference information of the file itself, and the like, and there are a plurality of journaling methods depending on what update history is stored and in what procedure.
In Patent Document 1, data to be written in a journaling area is stored in a stack, and when the update processing to the secondary storage device is completed first and the journal log is no longer needed, the stack data is deleted. Is disclosed.
Patent Document 2 discloses a technique for dividing a database into logical units, and acquiring journal logs by setting journal log acquisition contents, journal log acquisition necessity and unnecessary.
Japanese Patent Application Laid-Open No. 2004-228561 discloses a technique for immediately writing a journal log to a disk when the system load is small.

Japanese Patent Laid-Open No. 11-203186 JP 05-061751 A JP 2004-62869 A

In the conventional journaling file system, the journaling method is selected when mounting, and the journaling method is not changed during mounting. Therefore, in the conventional journaling file system, the journaling method cannot be dynamically switched according to the system state, and it is difficult to perform optimal control from the viewpoint of performance and power consumption.
An object of the present invention is to provide a technique for efficiently updating data.

  Therefore, the information processing apparatus according to the present invention includes a determination unit that determines a management method of the management unit for each processing unit during execution of the management unit that manages data update, and the management method determined by the determination unit And a creation unit that creates history information related to the management for each processing unit, and a recording unit that records the history information created by the creation unit in a storage area for each processing unit. .

  According to the present invention, it is possible to provide a technique for efficiently updating data.

It is a figure which shows an example of the hardware constitutions of information processing apparatus. 2 is a diagram illustrating an example of a functional configuration of the information processing apparatus according to the first embodiment. FIG. It is a figure which shows an example of a structure of a journaling area | region and a transaction. It is a figure which shows an example of an operation state corresponding | compatible management table. It is a figure which shows an example of the concept of the calculation method of a system monitoring value. 6 is a flowchart (part 1) illustrating an example of processing according to the first exemplary embodiment. 6 is a flowchart (part 2) illustrating an example of processing according to the first exemplary embodiment. 6 is a diagram illustrating an example of a functional configuration of an information processing apparatus according to Embodiment 2. FIG. It is a figure which shows an example of an individual journaling level management table. 10 is a flowchart illustrating an example of processing according to the second exemplary embodiment.

The best mode for carrying out the present invention will be described below with reference to the drawings.
<Embodiment 1>
FIG. 1 is a diagram illustrating an example of a hardware configuration of the information processing apparatus 100 according to the present embodiment.
In the information processing apparatus 100, the CPU 101 normally processes a plurality of processes one by one, and switches the process at regular intervals. Here, the CPU 101 may have a plurality of processor cores that perform arithmetic processing and the like. The information processing apparatus 100 may include a plurality of CPUs 101 themselves. In addition, the CPU 101 expands and executes a program stored in the secondary storage device 104 or the like in the primary storage device 102, thereby executing functions of the information processing device 100 described later, OS (Operating System) functions and flowcharts. Such processing is realized. Moreover, a journaling file system is implement | achieved when CPU101 runs the said program. As described above, the journaling file system is a file system with a journaling function. The journaling file system is an example of management means for managing data updates. Details of the journaling file system will be described later with reference to FIG.
The primary storage device 102 includes an SDRAM, an SRAM, or the like that records programs and data. Data such as programs, files, and directories developed in the primary storage device 102 is stored in the secondary storage device 104.
The secondary storage device 104 is a nonvolatile storage device, a storage device coated with a magnetic material such as a magnetic disk, a storage device that records data using a NAND flash memory with a limited number of writes, or A nonvolatile flash memory or the like can be used. The secondary storage device 104 is an optical disk that records data using a semiconductor laser, a magneto-optical disk that records data using a red laser beam, and a magnetic field, or a non-volatile that can be inserted into and removed from an information processing device. Can be used. The secondary storage device 104 stores various programs executed by the CPU 101 and various data. The CPU 101 implements the operation of the file stored in the secondary storage device 104 by making a READ request (read request) and a WRITE request (write request) from the OS via the I / O controller 103. Note that the information processing apparatus 100 may include a plurality of secondary storage devices 104.

In this embodiment, a journaling file system described later with reference to FIG. Information recorded in the journaling file system has a data portion corresponding to the information content and a metadata portion corresponding to the management information of the information. When an abnormal event such as power interruption or removal of a storage medium occurs during file operation, consistency may not be achieved between the information recorded in these file systems. In order to avoid such a situation, the journaling file system records history information about the update contents of files and directories and management information thereof in a storage device so that it can be used for failure recovery. Here, the above-mentioned history information is called a journal log. An area for recording a journal log is called a journaling area. The process of recording a journal log in the journaling area is called journaling. In journaling, a method relating to what kind of journal log is stored and in what procedure is called a journaling method. The journaling method is an example of a management method. Further, an area where the data part and the metadata part are placed with respect to the journaling area is called a data area.
In addition to file management information (inode), the metadata includes a block bitmap representing the usage status of each block of the secondary storage device 104 as 0 and 1, and the usage status of inode as 0 and 1. There are distinct inode bitmaps and the like. In addition, the metadata includes the number of empty blocks and the number of empty inodes. The inode includes information such as a file mode indicating a file type such as a symbolic link or a device file, a file size, a file last reference time, a file last state change time, and a file last update time. Further, the inode includes information such as a file deletion time, a user ID, a group ID, a file link number, a used block number, a block number, and a generation number as a configuration.

Next, a transaction will be described. A transaction is a processing unit in which a plurality of related processes are collected. A transaction includes a collection of journal logs in which dependencies necessary for maintaining the consistency of the journaling file system are closed. Journal logs within a transaction do not propagate dependencies outside the transaction. In other words, the information processing apparatus 100, when recovering from a journal log due to a failure or the like, needs to be performed for each transaction (each processing unit) and does not use an incomplete transaction for the recovery process.
In this embodiment, the journaling level is defined by the difference in the recorded contents and recording method of the journal log. The journaling level is an example of management method information. For example, there are four levels of journaling levels from 0 to 3. Journaling level 0 specifies that no journaling is performed. Journaling level 1 and journaling level 2 stipulate that only metadata is journaled. The difference between the two levels stipulates that the order of data area update and journal area recording is not uniquely determined in journaling level 1, whereas journaling level 2 records the journal area after the data area is updated. It is a point which prescribes that is performed. Journaling level 3 stipulates that journaling is performed not only on metadata but also on the update contents of data. Overall, the higher the journaling level, the better the reliability, but the longer it takes to write. The journaling level can be changed on a transaction basis. In the present embodiment, the journaling level uniquely determined by the information processing apparatus 100 having the journaling file system according to the state of the own apparatus is called a journaling policy.

FIG. 2 is a diagram illustrating an example of a functional configuration of the information processing apparatus 100 according to the present embodiment.
The image processing task 201 performs processing such as image filtering and cropping. The data handled by the image processing task 201 is not critical, and even if a failure occurs and the data is lost, the process can be re-executed. The image processing task 201 requests a file operation from the journaling file system 203. At that time, an open function having a format of “open (filename, flags)” is used on the program. In the argument of the function, the file name of the file that accesses “filename”, and the mode when accessing “flags” (whether only reading or writing is performed) are specified. When the processing of the open function is successful, the image processing task 201 obtains a file identifier associated with the file operation. The file identifier is an example of identification information that identifies a file operation. The image processing task 201 makes a subsequent file operation request (hereinafter referred to as a file operation request) to the journaling file system 203 using the file identifier.
The journaling file system 203 includes a file system core unit 207, a journal log control unit 208, a journal log recording unit 209, and a journal log reflection unit 213.
The journaling policy control unit 204 calculates a system monitoring value 211 to be described later with reference to FIGS. The system monitoring value 211 is an example of monitoring value information. Further, the journaling policy control unit 204 refers to an operation state correspondence management table 212 to be described later with reference to FIG. . Furthermore, the journaling policy control unit 204 notifies the journal log control unit 208 of the acquired journaling policy.

The primary storage device 102 stores information related to the system monitoring value 211 (hereinafter simply referred to as the system monitoring value 211).
The secondary storage device 104 has a journaling area 210, an operation state correspondence management table 212, and a data area 214, which will be described later with reference to FIG.
The file system core unit 207 is a core that performs file operation processing other than journaling.
The journal log control unit 208 controls the start and end of a transaction. The file system core unit 207 and the journal log control unit 208 maintain the consistency between the file operation and the journal operation by sharing the file update state. The journal log control unit 208 creates a journal log based on the latest journaling policy when starting a transaction.
The journal log recording unit 209 manages the internal configuration of the journaling area 210 and records a journal log in the journaling area 210.
The journal log reflecting unit 213 reflects the effective portion of the journal log in the journaling area 210 to the data area 214. The CPU 101 can determine a trigger to be reflected in advance according to a user instruction received via the operation unit or the like. For example, the trigger to be reflected may be a case where a valid transaction in the journaling area 210 exceeds a preset size (a quarter or a half of the size of the journaling area). In addition, the trigger to be reflected may be set at a predetermined time (for example, every 5 seconds).

Next, the configuration of the journaling area 210 and the configuration of the transaction will be described with reference to FIG.
FIG. 3A is a diagram illustrating an example of the configuration of the journaling region 210.
The journaling area 210 includes a journaling information management block 300 and a ring buffer 301.
The journaling information management block 300 includes start position information 302.
The ring buffer 301 includes a transaction 303, and repeats recording a new transaction 303 and releasing an unnecessary transaction 303.
The start position information 302 holds information (start address, block number, etc.) regarding the start position of the oldest transaction recorded in the ring buffer 301.

FIG. 3B is a diagram illustrating an example of the configuration of the transaction 303.
The transaction 303 has a descriptor block 304, a metadata block 305, and a commit block 306.
The descriptor block 304 is a block for storing management information for each transaction, and stores position information to be written to the secondary storage device and transaction identification ID. The transaction identification ID is a numerical value and is added every time a transaction is created.
The metadata block 305 is a block that holds the core data of the journal log, that is, update history data.
The commit block 306 is a block indicating the end of the transaction.
For example, the information processing apparatus 100 may reserve about 5% of the total capacity of the storage area of the secondary storage device 206 as the journaling area 210.

Next, the operation state correspondence management table 212 will be described with reference to FIG.
FIG. 4 is a diagram illustrating an example of the operation state correspondence management table 212.
The operation state correspondence management table 212 is a table that defines a journaling level corresponding to the system monitoring value 211. The operation state correspondence management table 212 is an example of first correspondence information in which the system monitoring value 211 is associated with a journaling level.
For example, the operation state correspondence management table 212 in FIG. 4 defines the journaling level as 0 when the system monitoring value is 0, and the journaling level as 1 when the system monitoring value is 1 or more and 10 or less. The operation state correspondence management table 212 of FIG. 4 defines a journaling level of 2 when the system monitoring value is 11 or more and 30 or less, and a journaling level of 3 when the system monitoring value is 31 or more. That is, the journaling policy control unit 204 can determine the journaling method corresponding to the journaling level (first determination) by searching the operation state correspondence management table 212 based on the system monitoring value 211.

Next, a method for calculating the system monitoring value 211 will be described with reference to FIG.
FIG. 5 is a diagram illustrating an example of a concept of a method for calculating the system monitoring value 211.
The journaling policy control unit 204 performs a calculation based on the input value and calculates a system monitoring value 211. In the example of FIG. 5, a case is shown where the input value is composed of the information amount of ACPI information 401, I / O statistical information 402, and activation process information 403. In the example of FIG. 5, the case where the process of calculating the system monitoring value 211 by the journaling policy control unit 204 includes a normalization process 404, a weighting process 405, and an addition process 406 is shown.
ACPI information 401 indicates ACPI P-state information. The information processing apparatus 100 suppresses power consumption by switching between an operating frequency and an operating voltage according to the usage rate of the CPU 101 and the like. At this time, the P state is an index indicating at which stage the system is operating in a system in which the operating frequency can be switched.
The I / O statistical information 402 indicates the amount of I / O access to the secondary storage device 104 per unit time of the information processing apparatus 100.
The activation process information 403 is obtained by quantifying the state of the information processing apparatus 100 based on the amount and type of the activated process. The higher the numerical value, the higher the load.

The normalization process 404 is a process for normalizing the information amounts of the ACPI information 401, the I / O statistical information 402, and the activation process information 403. In the normalization process 404, only one information amount among the information amounts of the ACPI information 401, the I / O statistical information 402, and the activation process information 403 may be normalized to obtain the system monitoring value 211. The journaling policy control unit 204 may derive a journaling level from the operation state correspondence management table 212 based on the normalized system monitoring value 211. In this case, for example, when the journaling policy control unit 204 detects from the ACPI information 401 that it is in the power saving state, the journaling policy control unit 204 can determine to decrease the journaling level. Note that the power saving state referred to here is a state in which some of the functions of the information processing apparatus 100 are temporarily stopped. In addition, when the journaling policy control unit 204 detects from the I / O statistical information 402 that the I / O access amount is lower than a predetermined access amount, the journaling policy control unit 204 can determine to increase the journaling level. . Note that the CPU 101 can set an access amount threshold value in advance according to a user instruction received via the operation unit or the like. Furthermore, the journaling policy control unit 204 can perform arithmetic processing between the information amounts of the ACPI information 401, the I / O statistical information 402, and the startup process information 403 by normalizing with the normalization processing 404. become.
The weighting process 405 is a process for adjusting the weighting of each information amount after normalization in the normalization process 404. The value calculated by the journaling policy control unit 204 by performing the addition process 406 on the weighted information amount is the system monitoring value 211. The journaling policy control unit 204 can acquire a journaling level based on a plurality of input information by searching the operation state correspondence management table 212 based on the calculated system monitoring value 211 (first search). .

The content of the weighting by the weighting process 405 and the content of the operation state correspondence management table 212 may be changed according to the usage mode of the information processing apparatus 100. For example, the journaling policy control unit 204 increases the weight of the I / O statistical information 402 more than others and adjusts the relationship with the operation state correspondence management table 212 so that the writing amount is larger than a predetermined amount. Can control the upper limit of the journaling level to 2. Note that the CPU 101 can set a threshold for the writing amount in advance according to a user instruction received via the operation unit or the like. Further, the journaling policy control unit 204 sets the journaling level to 0 in the power saving state by making the weighting of the ACPI information 401 larger than others and adjusting the relationship with the operation state correspondence management table 212. You can control. When no weighting is required, the journaling policy control unit 204 does not perform the weighting process 405 or performs the same weighting on each parameter in the weighting process 405, thereby achieving the same effect as when no weighting is required. Can be obtained.
As described above, the journaling policy control unit 204 calculates the system monitoring value 211 by the above-described method, and further searches the operation state correspondence management table 212 based on the calculated system monitoring value 211 to derive the journaling level. it can. Then, the journaling policy control unit 204 notifies the journal log control unit 208 of the derived journaling level as a journaling policy. Note that the timing notified by the journaling policy control unit 204 may be triggered by periodic execution by a timer or may be triggered by a predetermined event. Note that the CPU 101 can set a timer to be triggered in advance according to a user instruction received via the operation unit or the like. Similarly, the CPU 101 can set event information as a trigger in advance according to a user instruction received via the operation unit or the like.

Next, journaling processing in the present embodiment will be described with reference to FIG.
FIG. 6 is a flowchart illustrating an example of processing from when the information processing apparatus 100 according to the present embodiment starts up to when journaling is performed to reach a steady state.
In S600, when the information processing apparatus 100 is powered on, the processing of this flowchart is started.
In S601, the OS of the information processing apparatus 100 mounts the journaling file system 203, and the process proceeds to S602. That is, the OS of the information processing apparatus 100 recognizes the journaling file system 203, and the journaling file system 203 is in a running state.
In step S <b> 602, the journaling policy control unit 204 notifies the journal log control unit 208 of a predetermined default journaling level immediately after activation of the information processing apparatus 100 as a journaling policy. It is assumed that information regarding the default journaling level is stored in advance in the secondary storage device 104 or the like. Further, the CPU 101 can change information on the default journaling level according to a user instruction received via the operation unit or the like. Here, the information processing apparatus 100 shifts to a steady state. In addition, the steady state here is a state in which all functions of the information processing apparatus 100 are activated. In the steady state, the processes of S603 and S604 are executed in parallel.
In step S603, the journaling policy control unit 204 derives a journaling policy by the method described with reference to FIG. To do.
In step S604, the journal log recording unit 209 records a journal log for each transaction. Details of the process of S604 will be described later with reference to FIG.
With the above processing, the information processing apparatus 100 can dynamically control the journaling level in units of transactions according to the state of the own apparatus.

Next, the process of S604 in the flowchart of FIG. 6 will be described with reference to FIG.
FIG. 7 is a flowchart illustrating an example of transaction cycle processing in step S604 of FIG.
In S700, the journal log control unit 208 creates a new transaction and advances the process to S701. Thereafter, the journal log control unit 208 manages the transaction being created.
In S701, the journal log control unit 208 creates a journal log based on the journaling policy notified from the journaling policy control unit 204, and advances the process to S702.
In S702, the journal log recording unit 209 records the journal log created by the journal log control unit 208 in the journaling area 210, and advances the process to S703.
In step S <b> 703, the journal log control unit 208 shares the file update state with the file system core unit 207 and determines whether the transaction can be terminated. More specifically, the journal log control unit 208 and the file system core unit 207 determine that the transaction can be terminated if the consistency between the file operation and the journal operation is maintained. In S703, when the journal log control unit 208 determines that the transaction can be ended, the process proceeds to S704. When the journal log control unit 208 determines that the transaction cannot be ended, the process returns to S701.
In step S704, the journal log control unit 208 ends the transaction. Then, the journal log recording unit 209 records the remaining journal logs in the journaling area 210.
Through the above processing, the information processing apparatus 100 can create a journal log for each transaction based on the journaling policy, and record the created journal log in the journaling area 210.

  As described above, according to the present embodiment, the information processing apparatus 100 can dynamically control the journaling level in units of transactions according to the state of the own apparatus. The information processing apparatus 100 can record a journal log created for each transaction based on the journaling level in the journaling area 210. Thereby, the information processing apparatus 100 can improve performance and power consumption in the processing by the journaling file system.

<Embodiment 2>
As described in the first exemplary embodiment, the journaling policy control unit 204 of the information processing apparatus 100 calculates the system monitoring value 211 and searches the operation state correspondence management table 212 based on the calculated system monitoring value 211. Deriving a journaling policy. The journal log control unit 208 creates a journal log based on the derived journaling policy. Further, the journal log recording unit 209 records the journal log created by the journal log control unit 208 in the journaling area 210.
Here, when the open function of the first embodiment is used, write access in all tasks is a journaling level according to a journaling policy unique to the information processing apparatus 100. However, for some tasks it may not be desirable. For example, in an information processing apparatus used for commercial printing, the size of a document file becomes very large, so that a lot of time is spent on writing to a secondary storage device. For this reason, if a failure occurs during writing, it is likely to be affected by the failure, but since the contents of the document are very important data, the loss must be prevented. For such an important task, it is desirable that processing is always performed at the journaling level 3, for example, instead of following the journaling policy unique to the information processing apparatus 100. In the following, embodiments for such requirements will be described.

FIG. 8 is a diagram illustrating an example of the functional configuration of the information processing apparatus 100 according to the present embodiment.
8 includes an image processing task 901, a document processing task 902, a journaling file system 903, a journaling policy control unit 904, a primary storage device 102, and a secondary storage device 104.
The journaling file system 903 includes a file system core unit 907, a journal log control unit 908, a journal log recording unit 909, a journal log reflection unit 913, and an individual journaling level management table 918.
The primary storage device 102 has a system monitoring value 911.
The secondary storage device 104 includes a journaling area 910, a data area 914, and an operation state correspondence management table 912. The journaling area 910 includes a level 1 area 915, a level 2 area 916, and a level 3 area 917.
Here, the image processing task 901, the journaling policy control unit 904, the primary storage device 102, the secondary storage device 104, the system monitoring value 911, the operation state correspondence management table 912, and the data area 914 are the same as in the first embodiment. The description is omitted.

Hereinafter, differences from the first embodiment will be mainly described.
A manuscript processing task 902 performs processing related to creation of a manuscript file. Since the data handled by the manuscript processing task 902 is critical data, it is necessary to reliably restore the state before the occurrence when a failure occurs.
Both the image processing task 901 and the manuscript processing task 902 make file operation requests to the journaling file system 903, but the requesting methods are different. Since the case of the image processing task 901 is the same as that of the first embodiment, the description thereof is omitted. In the case of the manuscript processing task 902, an open2 function having a format of open2 (filename, flags, journal level) is used on the program. In the argument of the function, the file name of the file accessing filename, the mode when accessing flags (whether only reading or writing is performed), and the journaling level are specified in journallevel. When the Open2 function is called, the file system core unit 907 newly assigns a file identifier for identifying the file operation. Further, the file system core unit 907 updates the individual journaling level management table 918 in order to manage the correspondence between the journaling level passed by the open2 function and the file identifier.

FIG. 9 is a diagram illustrating an example of the individual journaling level management table 918. The individual journaling level management table 918 is an example of second correspondence information in which file identifiers are associated with journaling levels.
The example of FIG. 9 indicates that the journaling level is 0 when the file identifier is XXXX, and the journaling level is 3 when the file identifier is YYYY. Further, the example of FIG. 9 indicates that the journaling level is 0 when the file identifier is ZZZZ and the journaling level is 1 when the file identifier is AAAA. That is, the journal log control unit 908 can determine the journaling method corresponding to the journaling level (second determination) by searching the individual journaling level management table 918 based on the file identifier.
When the processing of the Open2 function is successful, the manuscript processing task 902 obtains a file identifier associated with the file operation. The task is an example of a process execution unit that executes a process. Subsequent file operation requests to the journaling file system 903 are made using the file identifier.
The file system core unit 907 and the journal log control unit 908 maintain the consistency between the file operation and the journal operation by sharing the update state of the file. The journal log control unit 908 searches for a file identifier (second search) from the individual journaling level management table 918 when starting a transaction. Then, if the file identifier can be identified, the journal log control unit 908 creates a journal log based on the corresponding journaling level. On the other hand, if the file identifier cannot be specified, the journal log control unit 908 creates a journal log based on the latest journaling policy.

The journaling area 910 is divided into areas for each journaling level (for each management method). More specifically, the journaling area 910 is divided into a level 1 area 915, a level 2 area 916, and a level 3 area 917. Here, the level 1 area 915 is a storage area in which journaling level 1 journal logs are recorded. The level 2 area 916 is a storage area for recording journaling level 2 journal logs. The level 3 area 917 is a storage area for recording journaling level 3 journal logs. Each of the level 1 area 915, the level 2 area 916, and the level 3 area 917 is included in the internal configuration shown in FIG.
The journal log recording unit 909 records the journal log in a journaling area that matches the journaling journaling level. In addition, the transaction identification ID set in the descriptor block 304 of each journaling area in the transaction section is the same.
The journal log reflection unit 913 reflects the effective portion of the journal log in the journaling area 910 in the data area 914. Here, the journal log reflecting unit 913 reflects the data in the data area 914 in ascending order from the transaction identification IDs described in the descriptor blocks 304 of all journaling areas. If the same transaction identification ID is found in a plurality of journaling areas, the journal log reflection unit 913 operates the transactions with the transaction identification IDs after that until all the journaling areas are reflected. must not.

Next, journaling processing in the present embodiment will be described with reference to FIG.
The flow of processing from when the information processing apparatus 100 is turned on until it reaches a steady state is the same as that in FIG.
FIG. 10 is a flowchart showing an example of a transaction cycle process in S604 of FIG.
In step S800, the journal log control unit 908 creates a new transaction and advances the process to step S801. Thereafter, the journal log control unit 908 manages the transaction being created.
In step S <b> 801, the journal log control unit 908 searches the individual journaling level management table 918 for the file identifier described above, and determines whether a matching file identifier exists. In S801, if the journal log control unit 908 determines that there is a matching file identifier, the process proceeds to S803. If the journal log control unit 908 determines that there is no matching file identifier, the process proceeds to S802.
In step S802, the journal log control unit 908 creates a journal log based on the journaling level acquired from the individual journaling level management table 918, and advances the process to step S804.
In step S803, the journal log control unit 908 creates a journal log based on the journaling policy notified from the journaling policy control unit 904, and advances the process to step S804.

In step S804, the journal log recording unit 909 records the journal log in the journaling area that matches the journaling level in the journaling area 910, and advances the process to step S805.
In step S805, the journal log control unit 908 shares the file update state with the file system core unit 907, determines whether or not the transaction can be ended, and proceeds to step S806 if it determines that the transaction can be ended. On the other hand, if the journal log control unit 908 determines in step S805 that the transaction cannot be terminated, the process returns to step S801. Note that the processing in S805 is the same as the processing in S703 in FIG.
In step S806, the journal log control unit 908 ends the transaction. Then, the journal log recording unit 909 records the remaining journal logs in the journaling area 910.
Through the above processing, the information processing apparatus 100 can create a journal log for each transaction based on the journaling level corresponding to the processing content, and record the created journal log in a recording area corresponding to the journaling level.

  As described above, according to the present embodiment, the information processing apparatus 100 can create a journal log based on the journaling level corresponding to the processing content regardless of the state of the own apparatus. That is, when processing critical data, the information processing apparatus 100 can perform processing based on the journaling level corresponding to the processing content, not the journaling level based on the state of the own apparatus. Further, the information processing apparatus 100 can use a plurality of journaling methods at the same time according to the processing content. Furthermore, the information processing apparatus 100 can record the created journal log in a recording area corresponding to the journaling level. As a result, the information processing apparatus 100 can realize efficient processing while effectively using the secondary storage device 104.

<Other embodiments>
The present invention can also be realized by executing the following processing. That is, software (program) that realizes the functions of the above-described embodiments is supplied to a system or apparatus via a network or various storage media, and a computer (or CPU, MPU, etc.) of the system or apparatus reads the program. It is a process to be executed.

  As mentioned above, according to each embodiment mentioned above, the technique which updates data efficiently can be provided.

  The preferred embodiment of the present invention has been described in detail above, but the present embodiment is not limited to the specific embodiment, and various modifications can be made within the scope of the gist of the present invention described in the claims.・ Change is possible.

Claims (11)

A determination unit that determines a management method of the management unit for each processing unit during execution of the management unit that manages data update;
Creating means for creating history information relating to the management for each processing unit in the management method determined by the determining means;
Recording means for recording the history information created by the creating means in a storage area for each processing unit;
An information processing apparatus comprising:   The information processing apparatus according to claim 1, wherein the determination unit includes a first determination unit that determines the management method for each processing unit based on a state of the information processing apparatus.   The determination means further includes second determination means for determining the management method for each processing unit based on the specified management method information when management method information related to the management method is specified. The information processing apparatus according to claim 2. The first determination unit includes a calculation unit that calculates a monitoring value related to the state of the information processing apparatus for each processing unit based on input information;
The information processing apparatus according to claim 2, wherein the determination unit determines the management method based on a monitoring value calculated by the calculation unit.   5. The calculation unit according to claim 4, wherein when there are a plurality of pieces of input information, each input information is weighted, and the monitoring value is calculated for each processing unit based on the weighted input information. Information processing device.   4. The second determination unit searches for management method information corresponding to identification information for identifying processing of the management unit, and determines the management method based on the management method information. The information processing apparatus described. The second determination unit further includes a determination unit that determines whether or not the management method information has been searched,
When it is determined that the management method information has been retrieved by the determination unit, the management method for each processing unit is determined as a management method corresponding to the retrieved management method information, and the management method information is retrieved by the determination unit. The information processing apparatus according to claim 6, wherein if it is determined that there is not, the management method for each processing unit is determined to be the management method determined by the first determination unit.   The information processing apparatus according to claim 1, wherein the recording unit records the history information created by the creating unit in a storage area that is different for each management method. The management means is a journaling file system,
The management method is a journaling method,
The information processing apparatus according to claim 1, wherein the history information is a journal log. An information processing method executed by an information processing apparatus,
A determination step of determining a management method of the management means for each processing unit during execution of the management means for managing update of data;
In the management method determined in the determination step, a creation step for creating history information related to the management for each processing unit;
A recording step of recording the history information created in the creation step in a storage area for each processing unit;
An information processing method comprising: On the computer,
A determination step of determining a management method of the management means for each processing unit during execution of the management means for managing update of data;
In the management method determined in the determination step, a creation step for creating history information related to the management for each processing unit;
A recording step of recording the history information created in the creation step in a storage area for each processing unit;
A program for running

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