JP2019144932A - Information processing device, information processing system, information processing method, and program - Google Patents

Abstract

To reduce access to a memory device.SOLUTION: An information processing device of the present invention includes: a cache connected to a memory device and storing data; classifying means for classifying data into multiple use data to be used by a plurality of virtual machines or independent use data to be used by a single virtual machine; and data storage means for storing data in the cache in a case of the multiple use data and storing data in the memory device in a case of the independent use data.SELECTED DRAWING: Figure 1

Description

  The present invention relates to data processing, and more particularly to processing for storing data in a storage device.

  In order to increase availability, an information processing apparatus such as a computer includes a virtualization platform that operates a virtual machine, and operates a predetermined operating system and application in the virtual machine that operates on the virtualization platform (for example, Patent Document 1). See).

  In normal operation of a virtual machine, the virtual machine achieves access to the virtual storage device by using a virtual connection function for connecting to an area secured in the storage device for each virtual machine. . Each virtual machine operates independently of other virtual machines. For this reason, when a plurality of virtual machines are executing normal applications or the like, a large number of accesses to the storage device from the virtual machines are unlikely to occur at the same time and are distributed.

Special table 2012-527704 gazette

  The operating system and application may need to be corrected to correct bugs or improve security. This fix is distributed as a patch file to virtual machines running the operating system.

  One example of a file distributed as a patch file is Hotfix. Hotfix is a file provided when a serious vulnerability with a high risk is found in software (for example, an operating system) that cannot be stopped. Therefore, Hotfix needs to be distributed as soon as possible to all virtual machines on which the target operating system operates.

  In addition, predetermined data is distributed as a file to a virtual machine as an update of data used by an application for operation. For example, a virus pattern file used for virus detection is distributed to the antivirus application. In particular, when a virus with a high risk level is found, a virus pattern file corresponding to the virus needs to be immediately distributed to all virtual machines on which the antivirus application operates. Note that the data file for adding to the virus pattern file and the file for correcting the virus pattern file may be referred to as “security patch”.

  Thus, a file such as Hotfix needs to be distributed to a plurality of virtual machines in parallel. In such file distribution, a plurality of virtual machines simultaneously access the original file in parallel. As a result, a large number of accesses from a plurality of virtual machines occur simultaneously in parallel with respect to the storage device storing the original file. As a result, an excessive load on the storage device may occur.

  In addition, the storage device generally processes access processing continuously, not in parallel. For this reason, the occurrence of many simultaneous accesses to the storage device may cause many processing waits in the storage device and may cause processing delay in the entire system.

  The invention described in Patent Document 1 operates memory mapping so as to reduce the number of requests for data of a virtual machine, and does not improve access that occurs simultaneously in a storage device.

  An object of the present invention is to provide an information processing apparatus that solves the above-described problems and reduces the occurrence of concurrent access to a storage device.

  An information processing apparatus according to one embodiment of the present invention is connected to a storage device and stores a cache for storing data, multiple use data used by a plurality of virtual machines, or single use data used by one virtual machine And a data storage unit that stores data in a cache in the case of multiple use data and stores data in a storage device in the case of single use data.

  An information processing system according to an aspect of the present invention includes the above information processing device, a storage device, and a network that connects the information processing device to the storage device.

  An information processing method according to one embodiment of the present invention includes an information processing device that is connected to a storage device and includes a cache that stores data. The data is classified into single use data to be used, and data is stored in a cache in the case of multiple use data, and data is stored in a storage device in the case of single use data.

  The program according to one embodiment of the present invention is a computer connected to a storage device and including a cache for storing data, and the data is used by multiple virtual machines used by a plurality of virtual machines or by a single virtual machine. A process of classifying the data into data and a process of storing data in a cache in the case of multiple use data and storing data in a storage device in the case of single use data are executed.

  According to the present invention, it is possible to reduce the occurrence of concurrent access to the storage device.

FIG. 1 is a block diagram showing an example of the configuration of an information processing system including an information processing apparatus according to the first embodiment of the present invention. FIG. 2 is a flowchart illustrating an example of a data write operation in the virtual machine according to the first embodiment. FIG. 3 is a flowchart illustrating an example of an operation of storing data in the data storage unit according to the first embodiment. FIG. 4 is a flowchart showing an example of an operation for storing data in the cache according to the first embodiment. FIG. 5 is a flowchart showing an example of an operation of writing data in the cache according to the first embodiment. FIG. 6 is a flowchart illustrating an example of an operation of transmitting a multiplexing request in the multiplexing unit according to the first embodiment. FIG. 7 is a flowchart illustrating an example of an operation when receiving a multiplexing request in the multiplexing unit according to the first embodiment. FIG. 8 is a diagram illustrating an example of information for managing data stored in the cache according to the first embodiment. FIG. 9 is a diagram illustrating an example of a classification rule according to the first embodiment. FIG. 10 is a block diagram illustrating an example of a schematic configuration of the information processing apparatus according to the first embodiment. FIG. 11 is a block diagram illustrating an example of a hardware configuration of the information processing apparatus according to the first embodiment.

  Next, embodiments of the present invention will be described with reference to the drawings.

  Each drawing is for explaining an embodiment of the present invention. However, the present invention is not limited to the description of each drawing. Moreover, the same number is attached | subjected to the same structure of each drawing, and the repeated description may be abbreviate | omitted. Further, in the drawings used for the following description, the description of the configuration of the part not related to the description of the present invention is omitted, and there are cases where it is not illustrated.

  In the following description, “data” is used as a term indicating a storage target. However, the storage target is not limited to individual data. The storage target may be a collection of data (for example, an array, a structure, a file, a folder, or a logical unit (or partition) obtained by logically dividing a storage device). Hereinafter, these are collectively referred to as “data”.

<First Embodiment>
The first embodiment will be described below with reference to the drawings.

[Description of configuration]
First, the configuration of the information processing apparatus 100 according to the first embodiment will be described with reference to the drawings.

  FIG. 1 is a block diagram illustrating an example of a configuration of an information processing system 10 including an information processing apparatus 100 according to the first embodiment of the present invention.

  As illustrated in FIG. 1, the information processing system 10 includes an information processing device 100, a storage device 200, and a network 400.

  The network 400 connects the information processing apparatus 100 and the storage device 200. The network 400 is not limited. For example, the network 400 may be a dedicated network (for example, Storage Area Network (SAN)) that connects the information processing apparatus 100 and the storage device 200. Alternatively, the network 400 may be a general-purpose communication network (for example, a Loca Area Network (LAN), the Internet, or a telephone line).

  The storage device 200 stores the data received from the information processing device 100 and transmits the stored data to the information processing device 100. The storage device 200 is not limited. For example, the storage device 200 is a magnetic disk device, a solid state drive (SSD), a magneto-optical disk device, or a combination of these devices (for example, a disk array device).

  The information processing apparatus 100 is connected to the storage device 200. As illustrated in FIG. 1, a plurality of information processing devices 100 may be connected to the storage device 200. However, one information processing apparatus 100 may be connected to the storage device 200.

  The information processing apparatus 100 is not limited to one, and may be connected to a plurality of storage devices 200.

  The information processing apparatus 100 includes a virtualization platform 106 and a virtual machine 101.

  The virtualization platform 106 provides an execution environment for one or a plurality of virtual machines 101. For example, the virtualization platform 106 provides the virtual machine 101 with a function as a storage device that virtualizes the storage device 200 that stores data. The virtualized storage device may have a function as a network storage. For example, a virtualized storage device may be accessible from a plurality of virtual machines 101.

  Further, the virtualization platform 106 may provide other functions to the virtual machine 101. For example, the virtualization platform 106 may provide a virtualized communication function for the virtual machine 101.

  The virtualization platform 106 is realized using hardware such as a processor and a memory not shown in FIG. 1 and predetermined software.

  The virtual machine 101 realizes a function as a general computer in the virtualization platform 106. For example, the virtual machine 101 executes a predetermined operating system (not shown) and executes various applications on the operating system. The virtual machine 101 is not limited to executing a single application, and may execute a job including a plurality of applications.

  Further, the virtual machine 101 may cooperate with other virtual machines 101. For example, any one virtual machine 101 uses a communication function provided by the virtualization platform 106 to obtain a virus pattern file (security patch) from the manufacturer of the anti-virus application, and distributes it to other virtual machines 101. May be. Alternatively, any one of the virtual machines 101 may obtain Hotfix from the manufacturer of the operating system using a communication function and distribute it to other virtual machines 101.

  Similar to the virtualization platform 106, the virtual machine 101 is realized using hardware such as a processor and a memory that are not shown in FIG. 1 and predetermined software.

  Further, details of the configuration of the information processing apparatus 100 according to the first embodiment will be described.

  First, details of the virtual machine 101 will be described.

  The virtual machine 101 includes a classification unit 103 and a virtual disk driver 105.

  The classification unit 103 classifies data that is requested to be stored in the virtualization platform 106. For example, when the virtual machine 101 creates a new file, the virtual machine 101 stores the created file. In this case, the classification unit 103 classifies the file.

  Alternatively, the virtual machine 101 stores the file in a virtual storage device having a network storage function in order to distribute the file acquired from the other device to the other virtual machine 101. Also in this case, the classification unit 103 classifies the file.

  The classification unit 103 may classify all data stored in the virtual machine 101 or may classify a predetermined type of data.

  As the details of the classification, the classification unit 103 classifies the data to be stored into data used by a plurality of virtual machines 101 or data used independently by the virtual machines 101.

  Hereinafter, data used by a plurality of virtual machines 101 is referred to as “multiple use data”. The plurality of virtual machines 101 is not limited to the virtual machine 101 that operates in one information processing apparatus 100. The plurality of virtual machines 101 may be virtual machines 101 that operate on the plurality of information processing apparatuses 100.

  Further, data that the virtual machine 101 uses independently is referred to as “single use data”.

  An example of the multiple use data is a file used by the operating system, a file used by an application operating on the operating system, or a library used by the application. More specific examples of multi-use files are security patches and hotfixes.

  An example of the single use data is a log file that stores the operation state of the virtual machine 101.

  The classification unit 103 classifies data using a predetermined rule.

  FIG. 9 is a diagram illustrating an example of a classification rule according to the first embodiment. FIG. 9 shows an example in which a file is used as a classification unit.

  “Multiple use file” is a rule of a file that is determined to be multiuse data. Files included in the folder indicated in [Folder] are determined to be multi-use data. A file including the extension shown in [Extension] is determined to be multiple use data.

  The “single use file” is a rule of a file that is determined as single use data. The file included in the folder shown in [Folder] is determined as single use data. A file including the extension shown in [Extension] is determined as single use data.

  The classification unit 103 may use information other than the above regarding the file. For example, a file whose attribute is read-only is often a file referenced by many. Therefore, the classification unit 103 may classify the read-only attribute file as a multiple use file.

  In this way, the classification unit 103 uses the location (for example, folder) where the file is stored, the name of the file (for example, extension), and / or the attribute (for example, read-only attribute) to classify the file. You may classify.

  Returning to the description with reference to FIG.

  The classification unit 103 may add the classified result to the data. A specific way of assigning the classification result is to include the result at a predetermined position of the data.

  When assigning a result to data, the classification unit 103 may directly assign the result of classification to data, or may request the virtual disk driver 105 described below to give the result.

  The virtual disk driver 105 provides the virtual machine 101 with a data mediating function (a function for transmitting data and a function for receiving data) for the virtualized storage device provided by the virtualization platform 106. Furthermore, the virtual disk driver 105 transmits data to the virtualization platform 106 together with the result of classification by the classification unit 103. When the data includes the classification result, the virtual disk driver 105 transmits the data to the virtualization platform 106. When the data does not include the classification result, the virtual disk driver 105 transmits the classification result and the data to the virtualization platform 106.

  The virtualized storage device is a storage device that the virtualization infrastructure 106 virtualizes the storage device 200 and the cache 107 and provides to the virtual machine 101.

  Next, details of the virtualization platform 106 will be described.

  The virtualization platform 106 includes a data storage unit 120, a cache 107, a transmission / reception queue 109, and a multiplexing unit 108.

  The cache 107 stores at least a part of data requested to be stored by the virtual machine 101. The cache 107 is configured using a memory of the information processing apparatus 100 on which the virtualization platform 106 operates. The cache 107 can be accessed from a plurality of virtual machines 101. The cache 107 is a shared cache having an area that can be shared by a plurality of virtual machines 101.

  Access to the cache 107 from an application running on the virtual machine 101 is faster than access to the storage device 200. In general, the access time for the cache 107 is tens of times to one hundredths compared to the access time for the storage device 200. For this reason, even when waiting for access to the cache 107 occurs, the waiting time is short. As a result, access to the cache 107 is less likely to cause contention than access to the storage device 200.

  In the following description, the cache 107 includes a function for managing data in the cache 107. For example, in the following description, the cache 107 executes a process of writing stored data to the storage device 200. However, this does not limit the first embodiment. For example, the information processing apparatus 100 may include a cache control unit that controls the cache 107 (not shown). In this case, the cache control unit controls data movement in the cache 107.

  The data structure in the cache 107 is not limited. The data structure in the cache 107 may be determined according to the specifications of the virtualization platform 106.

  The data stored in the cache 107 is generally written into the storage device 200 by a storage process that operates in the background using a predetermined cache algorithm at a predetermined cycle or a predetermined timing. The information processing apparatus 100 may use a general cache algorithm. The cache algorithm is, for example, Last Recently Used (LRU), or Last Frequently Used (LFU).

  Note that the cache 107 may hold data written to the storage device 200 until the free area in the cache 107 becomes smaller than a predetermined amount.

  The transmission / reception queue 109 is a queue that transmits data stored in the storage device 200 and receives data stored in the storage device 200. The transmission / reception queue 109 executes a first-in first-out process of data in order to absorb a time difference in processing between the storage device 200 and the information processing apparatus 100. The transmission / reception queue 109 may execute processing based on priority in addition to data first-in first-out processing.

  When the data storage unit 120 receives data from the virtual machine 101 together with the classification result, the data storage unit 120 stores the data in the cache 107 or the storage device 200 based on the classification result.

  Specifically, the data storage unit 120 operates as follows.

  The “multiple use data” is accessed in parallel from a plurality of virtual machines 101. In order to avoid simultaneous access to the storage device 200, the data storage unit 120 stores data classified as multiple use data in the cache 107 (shared cache).

  The “single use data” is not accessed from the virtual machine 101 concurrently. Therefore, in the case of “single use data”, the data storage unit 120 stores data classified as single use data in the storage device 200 via the transmission / reception queue 109.

  The cache 107 is configured using a memory. Data in the memory may be lost when the information processing apparatus 100 is powered off. In order to improve the reliability, the data stored in the cache 107 is preferably multiplexed with another information processing apparatus 100 or the like.

  When a plurality of devices share data, in a general system, the shared data is stored in a storage device accessible from the plurality of devices. In this case, a plurality of devices access the storage device. As a result, concurrent access to the storage device may occur.

  However, when the other information processing apparatus 100 stores the data in the cache 107, the virtual machine 101 operating in the other information processing apparatus 100 executes access to the cache 107 as access to the data. As a result, access from the other information processing apparatus 100 to the storage device 200 is reduced.

  Therefore, the multiplexing unit 108 requests the other information processing apparatus 100 to store the data, and executes the multiplexing of the data stored in the cache 107. The multiplexing unit 108 realizes communication with the multiplexing unit 108 of another information processing apparatus 100 via a predetermined communication network (not shown).

  When data is stored in the cache 107, the multiplexing unit 108 requests another information processing apparatus 100 to store the data in the cache 107 of the other information processing apparatus 100.

  The multiplexing unit 108 may multiplex some data instead of all the data stored in the cache 107. For example, the virtual machine 101 may store data used temporarily by the virtual machine 101 alone in the cache 107 in relation to the processing speed. In this case, the multiplexing unit 108 may not multiplex the data.

  Alternatively, the multiplexing unit 108 may select the information processing apparatus 100 that requests storage based on a predetermined criterion. For example, the multiplexing unit 108 may request multiplexing to the virtual machine 101 that created the data or the information processing apparatus 100 that shares data with a job that operates in the virtual machine 101.

  Further, the multiplexing unit 108 may hold information for managing data requested to be saved. For example, the other information processing apparatus 100 may not be able to respond to the multiplexing request until the predetermined processing is completed. Therefore, the multiplexing unit 108 creates management information (for example, a list) for requesting data multiplexing for each information processing apparatus 100 that is a request destination of multiplexing, and performs multiplexing according to the management information. You may ask.

  When the multiplexing unit 108 receives a request to store data in the cache 107 from another information processing apparatus 100, the multiplexing unit 108 stores the data in the cache 107 in association with the requesting information processing apparatus 100. The multiplexing unit 108 holds information in which the requested data is associated with the requesting information processing apparatus 100.

  As already described, when another information processing apparatus 100 stores data in the cache 107, access to the data from the virtual machine 101 operating in the other information processing apparatus 100 becomes access to the cache 107. As a result, access from other information processing apparatuses 100 to the storage device 200 is reduced.

  Further, when the data stored in the cache 107 is written to the storage device 200, the multiplexing unit 108 may notify the other information processing device 100 that has requested the storage that the data has been stored in the storage device 200. . At that time, the multiplexing unit 108 may request the other information processing apparatus 100 to delete the data written to the storage device 200. That is, the multiplexing unit 108 may stop multiplexing data written to the storage device 200. In this case, the usable capacity of the cache 107 in the other information processing apparatus 100 increases. When the virtual machine 101 operating in the other information processing apparatus 100 is using the data, the other information processing apparatus 100 stores the data in the cache 107 until the virtual machine 101 finishes using the data. May be.

  When the data stored in the cache 107 is no longer necessary (for example, when the job or application using the data ends), the multiplexing unit 108 stores the data in the other information processing apparatus 100 that requested the data storage. Request deletion of data. The multiplexing unit 108 of the other information processing apparatus 100 deletes the data for which the deletion request has been received. However, also in this case, when the virtual machine 101 operating in another information processing apparatus 100 is using the data, the other information processing apparatus 100 stores the data in the cache 107 until the virtual machine 101 finishes using the data. Data may be saved.

[Description of operation]
Next, the operation of the information processing apparatus 100 according to the first embodiment will be described with reference to the drawings.

  FIG. 2 is a flowchart illustrating an example of a data write operation in the virtual machine 101 according to the first embodiment.

  When data is written in the virtual machine 101, the classification unit 103 classifies the data into multiple use data or single use data based on a predetermined classification rule (for example, the classification rule shown in FIG. 9). (Step S321).

  If the data is multi-use data (Yes in step S322), the classification unit 103 assigns a classification result indicating “multi-use data” to the data (step S323).

  If the data is single use data (No in step S322), the classification unit 103 gives a classification result indicating “single use data” to the data (step S324).

  The manner in which the classification unit 103 gives the classification result is not limited. For example, the information processing apparatus 100 may reserve an area (for example, a flag) to be used as a classification result in an unused area in data transmitted from the virtual machine 101 to the virtualization platform 106. Alternatively, the information processing apparatus 100 may expand the data format and add a new area.

  Note that the virtual machine 101 may operate as separate information without attaching the classification result to the data. For example, the classification unit 103 may pass the classification result and data to the virtual disk driver 105.

  The virtual disk driver 105 transmits the classification result and data to the virtualization platform 106, and requests data storage (step S325).

  FIG. 3 is a flowchart illustrating an example of an operation of storing data in the data storage unit 120 according to the first embodiment.

  When receiving the data storage request from the virtual machine 101, the data storage unit 120 of the virtualization platform 106 confirms the classification result transmitted together with the data (step S331).

  If the classification result is multiple use data (Yes in step S332), the data storage unit 120 stores the data in the cache 107.

  If the classification result is single use data (No in step S332), the data storage unit 120 registers the data in the transmission / reception queue 109 (step S334).

  The transmission / reception queue 109 stores the registered data in the storage device 200 (step S335).

  FIG. 4 is a flowchart showing an example of an operation for storing data in the cache 107 according to the first embodiment. In the operation shown in FIG. 4, the cache 107 avoids duplication of data. The cache 107 uses a hash value to avoid duplication. Note that the cache 107 may use another method for avoiding duplication.

  When the cache 107 receives the data to be stored from the data storage unit 120, the cache 107 performs the following operation (step S341).

  The cache 107 checks whether or not the received data is already stored in the cache 107 (step S342). More specifically, the cache 107 performs the following confirmation. First, the cache 107 calculates a hash value of data requested to be stored (request data). Then, the cache 107 compares the hash value of the data (stored data) stored in the cache 107 with the calculated hash value of the request data.

  When the hash values of the data match, the cache 107 compares the stored data with the request data.

  If the saved data and the requested data match, the cache 107 determines that there is saved data.

  If the hash values do not match or the data do not match, the cache 107 determines that there is no stored data.

  If the data is stored (Yes in step S342), the cache 107 ends the process. Note that, when the data includes a plurality of contents and the cache 107 matches part of the contents as in the structure, the cache 107 uses the received data to store the stored data. Update (step S343).

  When data is not stored (No in step S342), the cache 107 checks whether the data can be stored (step S344). Specifically, the cache 107 checks whether or not there is a free area for storing data in the cache 107.

  If there is no free space to be stored (No in step S344), the cache 107 writes a part of the data stored in the cache 107 to the storage device 200 in accordance with a predetermined method (step S345). The cache 107 may use the same technique as the cache algorithm that operates in the background, such as LRU or LFU, as a predetermined technique. Then, the cache 107 releases the written data area. Then, the cache 107 returns to step S344. That is, the cache 107 repeats releasing the area until the received data can be stored.

  If there is a free area to be saved (Yes in step S344), the cache 107 saves the received data (step S346).

  The cache 107 updates management information regarding data to be stored as appropriate.

  Note that if the cache 107 does not manage avoidance of duplication, the cache 107 may not include step S342 and step S343.

  FIG. 8 is a diagram illustrating an example of information for managing data stored in the cache 107 according to the first embodiment.

  The management information shown in FIG. 8 is management information when the cache 107 manages data using a predetermined block of data. The management information may be stored in the cache 107 or may be stored in another memory in the information processing apparatus 100 (not shown).

  The management information includes a block identifier, a request destination identifier, and a head address. Furthermore, the management information includes at least one set of information related to data to be stored. The set of information includes a next address, a data address, a flag, a request source identifier, and a hash value.

  However, the management information and the set of information shown in FIG. 8 are examples. The set of management information and information may include other information. The set of management information and information may not include part of the information. Management information and a set of information are determined in accordance with the management method of the cache 107.

  The block identifier is an identifier (management information identifier) for uniquely identifying a block. The block identifier may include other information. For example, when the block has a type, the block identifier may include the type.

  The request destination identifier is an identifier of the information processing apparatus 100 including the cache 107 that stores data. In the case of data requested to be multiplexed by the multiplexing unit 108 of another information processing apparatus 100, the information processing apparatus 100 including the cache 107 is a request destination. Therefore, FIG. 8 expresses the identifier of the information processing apparatus 100 including the cache 107 as “request destination identifier”.

  The start address is an address where the first set of information is stored. In the management information shown in FIG. 8, the size of the set is constant. For this reason, the start address holds the start address of the first set. When the size of the set changes, the start address may include the length of the set in addition to the start address of the first set. However, the set of information may include a length.

  The next address is the next set of addresses. The next address may include the length of the set as with the head address.

  If there is no next set, the next address holds information indicating that there is no next set (for example, own address or blank).

  The data address is a data storage address in the cache 107.

  The flag is information indicating whether data saved in the cache 107 is saved in the storage device 200. The initial state of the flag of the data saved in the cache 107 based on the request from the virtual machine 101 is “unsaved”. When the data saved in the cache 107 is saved in the storage device 200, the flag is changed from “not saved” to “saved”. When the data stored in the cache 107 is data read from the storage device 200, the initial value of the flag is “saved”. In addition, when “saved” data is changed in the cache 107, the flag is changed to “unsaved”.

  The flag is information indicating whether the data in the cache 107 matches the data in the storage device 200.

  The request source identifier is an identifier of the information processing apparatus 100 that has requested storage of data. In the case of data of the virtual machine 101 of the own device, the request source identifier is the identifier of the own device. In the case of data requested to be stored by the multiplexing unit 108 of another information processing apparatus 100, the request source identifier is the identifier of the information processing apparatus 100 that has requested.

  The request source identifier may include other information. For example, the request source identifier may include the identifier of the virtual machine 101 in addition to the identifier of the information processing apparatus 100.

  The hash value is a hash value of stored data.

  FIG. 5 is a flowchart showing an example of the data write operation in the cache 107 according to the first embodiment.

  The cache 107 executes the operation described below at a predetermined cycle or a predetermined timing as a background operation. Further, even when there is no area to be saved when the data saving unit 120 is requested to save data, the cache 107 executes the operation after step S353 to secure the area.

  The cache 107 checks whether it is necessary to release the area in the cache 107 (step S351). The condition for determining whether or not the area needs to be released may be determined in accordance with the way of managing the cache 107. For example, the case where release is necessary is a case where the free area of the cache 107 is smaller than a predetermined threshold. Alternatively, the case where the release is necessary is a case where the data stored in the cache 107 is not accessed for a predetermined time.

  If it is not necessary to release the area (No in step S352), the cache 107 ends the operation.

  If the area needs to be released (Yes in step S352), the cache 107 selects data to be written to the storage device 200 (step S353). The cache 107 selects data using a predetermined cache algorithm (for example, LRU or LFU).

  The cache 107 writes the selected data to the storage device 200. Specifically, the cache 107 selects and adds data to the transmission / reception queue 109 (step S354).

  When the data is stored in the storage device 200 from the transmission / reception queue 109, the cache 107 releases the area of the selected data (written data) (step S355). Note that the cache 107 may release the area when data is added to the transmission / reception queue 109.

  Note that the cache 107 appropriately updates management information regarding data stored in the cache 107.

  Further, the cache 107 may change the operation based on the state of the transmission / reception queue 109.

  For example, the cache 107 may change the amount of data added to the transmission / reception queue 109 according to the amount of data accumulated in the transmission / reception queue 109. Specifically, the cache 107 compares the amount of data to be added when the amount of data accumulated in the transmission / reception queue 109 is smaller than a predetermined threshold with respect to the case where the amount of data accumulated in the transmission / reception queue 109 is larger than the threshold. May be more.

  FIG. 6 is a flowchart illustrating an example of an operation of transmitting a multiplexing request in the multiplexing unit 108 according to the first embodiment.

  The multiplexing unit 108 checks whether or not the data classified as the multiple use data in the data storage unit 120 is stored in the cache 107 (step S361). The storage of data here includes addition of data and update of data.

  If no data is stored (No in step S361), the multiplexing unit 108 ends the process.

  If the data has been saved (Yes in step S361), the multiplexing unit 108 requests the multiplexing unit 108 of the other information processing apparatus 100 to save the data classified into the multiple use data and saved in the cache 107. (Step S362). When making a request, the multiplexing unit 108 transmits the identifier of the information processing apparatus 100 together with the data.

  FIG. 7 is a flowchart illustrating an example of an operation when a multiplexing request is received in the multiplexing unit 108 according to the first embodiment.

  The multiplexing unit 108 receives a request from the multiplexing unit 108 of the other information processing apparatus 100 (step S371).

  Based on the request, the multiplexing unit 108 stores the data in the cache 107 (step S372). The multiplexing unit 108 stores the identifier of the other information processing apparatus 100 received together with the data in association with the data.

  Note that the information processing apparatus 100 may store data received from another information processing apparatus 100 and stored in the cache 107 in the storage device 200 in order to improve reliability. When the information processing apparatus 100 that has requested storage does not require data multiplexing, the multiplexing unit 108 stores the data requested to be stored by another information processing apparatus 100 in the cache 107 (and storage device). 200).

[Description of effects]
Next, effects of the information processing apparatus 100 according to the first embodiment will be described.

  The information processing apparatus 100 according to the first embodiment can obtain the effect of reducing the occurrence of concurrent access to the storage device 200.

  The reason is as follows.

  The information processing apparatus 100 is connected to the storage device 200. The information processing apparatus 100 includes a virtual machine 101 and a virtualization platform 106. The virtual machine 101 includes a classification unit 103. The classification unit 103 classifies the data into multiple use data used by a plurality of virtual machines 101 or single use data used by one virtual machine 101. The virtualization platform 106 includes a cache 107 and a data storage unit 120. The cache 107 stores data. The data storage unit 120 stores data in the cache 107 in the case of multiple use data, and stores data in the storage device 200 in the case of single use data.

  The virtual machine 101 further includes a virtual disk driver 105. The virtual disk driver 105 mediates data. Specifically, the virtual disk driver 105 transmits the classification result and data to the virtualization platform 106.

  The virtualization platform 106 further includes a transmission / reception queue 109. The transmission / reception queue 109 transmits data to the storage device 200. Specifically, the transmission / reception queue 109 transmits data in synchronization with the storage device 200.

  The data storage unit 120 stores data (multiple use data) accessed from the plurality of virtual machines 101 in the cache 107 based on the classification result of the classification unit 103. Therefore, access to the data from a plurality of virtual machines 101 is access to the cache 107. As a result, the occurrence of concurrent access to the storage device 200 is reduced.

  Further, the information processing apparatus 100 has an effect of improving the reliability of data stored in the cache 107.

  The reason is that the multiplexing unit 108 requests the other information processing apparatus 100 to save the data saved in the cache 107.

  Further, the other information processing apparatus 100 stores the data in the cache 107 based on the operation of the multiplexing unit 108 described above. Therefore, access to the data in the other information processing apparatus 100 is not access to the storage device 200 but access to the cache 107 of the other information processing apparatus 100. As a result, the information processing apparatus 100 can achieve an effect of further reducing access to the storage device 200.

  In addition, the data storage unit 120 stores data accessed from the plurality of virtual machines 101 in the cache 107. The data storage unit 120 stores data accessed from one virtual machine 101 in the storage device 200. Therefore, the information processing apparatus 100 can reduce the capacity required for the cache 107 as compared to the case where all the data of the virtual machine 101 is stored in the cache 107.

[Outline of Embodiment]
The positions of the configurations included in the virtual machine 101 and the virtualization infrastructure 106 described so far are examples. The positions of these configurations may be changed. For example, the data storage unit 120 may be included in each virtual machine 101.

  An overview of the information processing apparatus 100 according to the first embodiment will be described with reference to the drawings.

  FIG. 10 is a block diagram illustrating a configuration of an information processing device 150 that is an example of an overview of the information processing device 100 according to the first embodiment.

  The information processing device 150 is connected to the storage device 200. The information processing apparatus 150 includes a cache 107, a classification unit 103, and a data storage unit 120. The cache 107 stores data. The classification unit 103 classifies the data into multiple use data used by a plurality of virtual machines 101 or single use data used by one virtual machine 101. The data storage unit 120 stores data in the cache 107 in the case of multiple use data, and stores data in the storage device 200 in the case of single use data.

  The information processing apparatus 150 configured as described above can obtain the same effects as the information processing apparatus 100.

  The reason is that each configuration of the information processing apparatus 150 operates in the same manner as the configuration of the information processing apparatus 100.

  The information processing apparatus 150 is the minimum configuration in the embodiment of the present invention.

[Hardware configuration]
Next, the hardware configuration of the information processing apparatuses 100 and 150 will be described using the information processing apparatus 100.

  For example, each component of the information processing apparatus 100 may be configured with a hardware circuit.

  Alternatively, in the information processing device 100, each component may be configured using a plurality of devices connected via a network.

  Alternatively, in the information processing apparatus 100, the plurality of components may be configured with a single piece of hardware.

  Alternatively, the information processing apparatus 100 may be realized as a computer apparatus including a processor and a memory. The processor is, for example, a central processing unit (CPU) or a micro processing unit (MPU). The memory is, for example, a read only memory (ROM) and a random access memory (RAM).

  In addition to the above configuration, the information processing apparatus 100 may be realized as a computer apparatus that further includes an input / output connection circuit (IOC: Input and Output Circuit). The information processing apparatus 100 may be realized as a computer apparatus including a network interface circuit (NIC: Network Interface Circuit) in addition to the above configuration.

  FIG. 11 is a block diagram illustrating a configuration of an information processing apparatus 600 that is an example of a hardware configuration of the information processing apparatus 100 according to the first embodiment.

  The information processing apparatus 600 includes a CPU 610, a ROM 620, a RAM 630, an internal storage device 640, an IOC 650, and a NIC 680, and constitutes a computer device.

  The CPU 610 reads a program from the ROM 620. The CPU 610 controls the RAM 630, the internal storage device 640, the IOC 650, and the NIC 680 based on the read program. The computer including the CPU 610 controls these configurations, and implements the functions as the virtual machine 101 and the virtualization platform 106 illustrated in FIG.

  When realizing each function, the CPU 610 may use the RAM 630 or the internal storage device 640 as a temporary storage medium for the program.

  The CPU 610 may read a program included in the storage medium 700 that stores the program so as to be readable by a computer using a storage medium reading device (not shown). Alternatively, the CPU 610 may receive a program from an external device (not shown) via the NIC 680, store the program in the RAM 630 or the internal storage device 640, and operate based on the stored program.

  The ROM 620 stores programs executed by the CPU 610 and fixed data. The ROM 620 is, for example, a P-ROM (Programmable-ROM) or a flash ROM.

  The RAM 630 temporarily stores programs executed by the CPU 610 and data. The RAM 630 is, for example, a D-RAM (Dynamic-RAM). A part of the RAM 630 operates as the cache 107.

  The internal storage device 640 stores data and programs that the information processing device 600 saves over a long period of time. Further, the internal storage device 640 may operate as a temporary storage device for the CPU 610. The internal storage device 640 is, for example, a hard disk device, a magneto-optical disk device, an SSD, or a disk array device.

  Here, the ROM 620 and the internal storage device 640 are non-transitory storage media. Meanwhile, the RAM 630 is a volatile storage medium. The CPU 610 can operate based on a program stored in the ROM 620, the internal storage device 640, or the RAM 630. That is, the CPU 610 can operate using a nonvolatile storage medium or a volatile storage medium.

  The IOC 650 mediates data between the CPU 610, the input device 660, and the display device 670. The IOC 650 is, for example, an IO interface card or a USB (Universal Serial Bus) card. Further, the IOC 650 is not limited to a wired connection such as a USB, but may be wireless.

  The input device 660 is a device that receives an input instruction from an operator of the information processing apparatus 600. The input device 660 is, for example, a keyboard, a mouse, or a touch panel.

  The display device 670 is a device that displays information to the operator of the information processing apparatus 600. The display device 670 is a liquid crystal display, for example.

  The NIC 680 relays data exchange with an external device (not shown) via a network. The NIC 680 is, for example, a LAN card. Furthermore, the NIC 680 is not limited to a wired line, and may use wireless. The NIC 680 may operate as a part of the transmission / reception queue 109.

  The information processing apparatus 600 configured as described above can obtain the same effects as the information processing apparatus 100.

  The reason is that the CPU 610 of the information processing apparatus 600 can realize the same functions as the components of the information processing apparatus 100 based on the program.

  While the present invention has been described with reference to the embodiments, the present invention is not limited to the above embodiments. Various changes that can be understood by those skilled in the art can be made to the configuration and details of the present invention within the scope of the present invention.

  The present invention can be used in an information processing apparatus using a virtual machine and / or a virtual desktop.

DESCRIPTION OF SYMBOLS 10 Information processing system 100 Information processing apparatus 101 Virtual machine 103 Classification | category part 105 Virtual disk driver 106 Virtualization infrastructure 107 Cache 108 Multiplexing part 109 Transmission / reception queue 120 Data storage part 150 Information processing apparatus 200 Storage apparatus 400 Network 600 Information processing apparatus 610 CPU
620 ROM
630 RAM
640 Internal storage device 650 IOC
660 Input device 670 Display device 680 NIC
700 storage media

Claims (10)

Connected to the storage device,
A cache to store data,
Classifying means for classifying the data into multiple use data used by a plurality of virtual machines or single use data used by one virtual machine;
A data storage unit that stores the data in the cache in the case of the multiple use data, and stores the data in the storage device in the case of the single use data. The virtual machine;
A virtualization platform for operating the virtual machine,
The virtual machine is
The classification means;
Data mediating means for transmitting the classified result and the data to the virtualization platform,
The virtualization infrastructure is
The cache;
Data transmitting means for transmitting the data to the storage device,
The information processing apparatus according to claim 1, wherein the data storage unit stores the data in the storage device using the data transmission unit when the result is the single use data. The virtualization infrastructure is
When the data is stored in the cache, the other information processing device is requested to store the data,
The information processing apparatus according to claim 2, further comprising: a multiplexing unit that stores the requested data in the cache when the other data processing apparatus requests the storage of the data. The information processing apparatus according to any one of claims 1 to 3,
The storage device;
An information processing system comprising: a network connecting the information processing device to the storage device. Connected to the storage device,
An information processing apparatus including a cache for storing data is
The data is classified into multiple use data used by a plurality of virtual machines or single use data used by one virtual machine,
An information processing method, wherein the data is stored in the cache in the case of the multiple use data, and the data is stored in the storage device in the case of the single use data. The virtual machine;
A virtualization platform for operating the virtual machine,
The virtual machine is
Classifying the data into the multiple use data or the single use data;
Send the classification result and the data to the virtualization platform,
The virtualization infrastructure is
Including the cache;
The information processing method according to claim 5, wherein the data is stored in the cache in the case of the multiple use data, and the data is stored in the storage device in the case of the single use data. The virtualization infrastructure is
When the data is stored in the cache, the other information processing device is requested to store the data,
The information processing method according to claim 6, wherein when requested to save the data from another information processing apparatus, the requested data is saved in the cache. Connected to the storage device,
On the computer that contains the cache that stores the data,
A process of classifying the data into multiple use data used by a plurality of virtual machines or single use data used by one virtual machine;
A program for storing the data in the cache in the case of the multi-use data and for storing the data in the storage device in the case of the single use data. Processing as the virtual machine;
And a process as a virtualization platform for operating the virtual machine,
The process as the virtual machine is
A process of classifying the data into the multiple use data or the single use data;
Processing for transmitting the classified result and the data to the virtualization platform;
Including
The process as the virtualization platform is
Processing as the cache;
The program according to claim 8, further comprising: storing the data in the cache in the case of the multiple use data, and storing the data in the storage device in the case of the single use data. The process as the virtualization platform is
When the data is stored in the cache, a process for requesting the other information processing apparatus to store the data;
The program according to claim 9, wherein when requested to save the data from another information processing apparatus, the requested data is saved in the cache.

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