KR102486980B1 - Block data storage system and block data storage method, and program stored in recording medium - Google Patents

Abstract

A block data storage system according to an embodiment of the present invention includes a storage device including a data storage area for storing data; and a controller for controlling the storage device, wherein the data storage area includes a file data area for storing data and a meta data area for storing meta information about the file data area, wherein the file data area comprises: It may include a plurality of blocks having the same size.

Description

Block data storage system, block data storage method and program stored in recording medium

The present invention relates to data storage technology, and more particularly, to a block data storage system for storing data in a hard disk, non-volatile memory, etc., a block data storage method, and a program stored in a recording medium.

A data storage device includes a magnetic disk, a semiconductor memory, and the like.

Magnetic disks have been widely used for large-capacity data storage. A magnetic disk has an average read/write time of several milliseconds per kilobyte. In addition, the magnetic disk has a characteristic that the read/write time varies because the arrival time of the arm is different depending on the physical location where the data is stored.

Recently, non-volatile memory devices that have a shorter read/write time than magnetic disks, consume less power, and occupy a smaller volume are rapidly replacing magnetic disks. This is a possible result because the capacity of the non-volatile memory device has been increased.

A non-volatile memory device is a semiconductor memory device that can be electrically read, written, and erased, and can retain programmed data even in the absence of power supply. A process of storing data in a non-volatile memory device is also referred to as programming in addition to writing.

Among non-volatile memory devices, a NAND flash memory (SSD) is widely used as a mass storage device in recent years. NAND flash memory has a read time of several tens of microseconds (microsecond) and a write time of hundreds of microseconds per kilobyte. In addition, NAND flash memory generally has an erase time different from a write time. Since the erase time is several milliseconds, a method of simultaneously erasing a plurality of memory cells is widely used to shorten the erase time for all data. . At this time, a unit of a plurality of memory cells that are simultaneously erased is called an erase unit.

As described above, nonvolatile memories including NAND flash memories are significantly different from conventional magnetic disks in that they have asymmetric read/write/erase characteristics in which the times required for read/write/erase are all different. In addition, since non-volatile memory electrically accesses data, the location where data is stored has little effect on read/write/erase characteristics, which is significantly different from conventional magnetic disks.

Video data output by a video data generating device such as CCTV is in the form of a continuous stream, and when storing and backing up such video data, the number of recording and deleting of data is greater than the number of recording and deleting of data in a general PC. Significantly less.

As a file management system, storage methods such as NTFS, EXT4, and FAT32 are generally widely used, but these conventional storage methods are efficient when data is frequently written, read, and deleted. However, it cannot be said that it is suitable as a storage method for moving image data where the frequency of data recording, reading, and deletion is not high. Accordingly, there is a demand for a data storage method suitable for storing and backing up video data.

The problem to be solved by the present invention is to solve the above-mentioned problems of the prior art, and can efficiently use the capacity of a storage device for storing data, data security is possible, and the search speed of stored data is improved. It is to provide a block data storage system, block data storage method and program.

As a means for solving the above problems, a block data storage system according to an embodiment of the present invention includes a storage device including a data storage area for storing data; and a controller for controlling the storage device, wherein the data storage area includes a file data area for storing data and a meta data area for storing meta information about the file data area, wherein the file data area comprises: It may include a plurality of blocks having the same size.

In one embodiment, the meta data area includes allocation block information, member information, and block search information, and the allocation block information includes information on the number of remaining blocks that can be allocated for data storage and block identification information to be allocated next, , The member information includes a member index assigned to one or more data generating devices for identification of the data generating device and block identification information assigned to each member index, and the block search information includes data recorded for each block. It can include the date and time of creation, the date and time of termination, and the assigned member index.

In one embodiment, each block of the file data area includes file data and an index list, the file data includes a plurality of frame data, and the index list includes position information in blocks of a plurality of frames, a plurality of It may include time information and event information of the frame.

In one embodiment, the plurality of blocks of the file data area may have a size of 64 M, 128 MB or 256 MB.

In one embodiment, the controller allocates a first block of the file data area to data generated by a first member, which is a data generating device, and sequentially stores the data generated by the first member in the first block. The controller may allocate a second block of the file data area to data generated by the second member, which is a data generating device, and sequentially store the data generated by the second member in the second block.

In one embodiment, when the size of data stored in the first block reaches a predetermined threshold, the controller allocates a third block of the file data area to the first member for data generated by the first member, and assigns the third block to the first member. Data generated by may be sequentially stored in the third block.

In one embodiment, when data is recorded in all the blocks of the file data area, the controller may reallocate blocks for data storage in the order of generation date and time.

In one embodiment, the meta data area includes allocation block information, member information, and block search information, the allocation block information includes information on the number of remaining allocable blocks and block identification information to be allocated next, and the member information includes a member index assigned to one or more data generating devices for identification of the data generating device and block identification information assigned to each member index, and the block search information includes the creation date and time of data recorded for each block; end date and assigned member index, each block of the file data area includes file data and an index list, the file data includes a plurality of frame data, and the index list includes a plurality of frame data location information of a plurality of frames, time information of a plurality of frames, and event information, and when the controller reads frame data generated at a first recording time by a first member that is a data generating device, Detecting a member index assigned to a first member and allocated block identification information from the member information, and detecting block identification information including a frame generated at a first recording time from the block search information of the meta data area; Location information of a block of a frame created at a first recording time may be detected from the index list of the file data area.

As means for solving the above problems, a block data storage method according to an embodiment of the present invention includes a storage device including a data storage area for storing data and a block including a controller for controlling the storage device. A block data storage method performed by a data storage system, wherein the data storage area includes a file data area for storing data and a meta data area for storing meta information about the file data area, wherein the file data area comprises: It includes a plurality of blocks having the same size, and the block data storage method allocates a first block of the file data area to data generated by a first member that is a data generating device, and the first member A first block storage step of sequentially storing data generated by the first block in a first block; and a second block in which the controller allocates a second block of the file data area to data generated by a second member that is a data generating device and sequentially stores data generated by the second member in the second block. A storage step may be included.

In one embodiment, when the size of data stored in the first block reaches a predetermined threshold value, the controller allocates a third block of the file data area for data generated by the first member, and A third block storage step of sequentially storing data generated by the member in a third block may be included.

In one embodiment, when data is recorded in all blocks of the file data area, the controller may reallocate the blocks for data storage in the order of generation date and time.

In one embodiment, the meta data area includes allocation block information, member information, and block search information, the allocation block information includes information on the number of remaining allocable blocks and block identification information to be allocated next, and the member information includes a member index assigned to one or more data generating devices for identification of the data generating device and block identification information assigned to each member index, and the block search information includes the creation date and time of data recorded for each block; end date and assigned member index, each block of the file data area includes file data and an index list, the file data includes a plurality of frame data, and the index list includes a plurality of frame data When reading frame data generated at a first recording time by a first data generating device, the controller includes the member of the metadata area an allocation block detection step of detecting a member index assigned to the first data generating device and allocated block identification information from the information; a block identification information detection step in which the controller detects block identification information including a frame generated at a first recording time from the block search information of the meta data area; and detecting, by the controller, position information of a block of a frame created at a first recording time from the index list of the file data area.

As a means for solving the above problems, the program according to an embodiment of the present invention may be a program stored in a recording medium to perform the block data storage method by a computer.

According to an embodiment of the present invention, a data storage area of a storage device includes a file data area in which data is stored and meta data for storing the meta information, and the file data area includes a plurality of blocks having the same size. , A block data storage system capable of efficiently using the capacity of a storage device for storing data, enabling data security, and improving the search speed of stored data, a block data storage method, and a program stored in a recording medium can be provided. .

1 shows a network connection structure of an advertisement production support system according to an embodiment of the present invention.
2 is a diagram illustrating a data storage area of a storage device included in a block data storage system according to an embodiment of the present invention.
3 is a diagram showing the configuration of a meta data area of a data storage area according to an embodiment of the present invention.
4 shows the configuration of each block of the file data area of the data storage area according to an embodiment of the present invention.
5 is a flowchart of a data writing process in a block data storage method performed by a block data storage system according to an embodiment of the present invention.
6 is a flowchart of a data reading process in a block data storage method performed by the block data storage system 130 according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The terms used in the present invention have been selected from general terms that are currently widely used as much as possible while considering the functions in the present invention, but these may vary depending on the intention of a person skilled in the art or precedent, the emergence of new technologies, and the like. In addition, in a specific case, there is also a term arbitrarily selected by the applicant, and in this case, the meaning will be described in detail in the description of the invention. Therefore, the term used in the present invention should be defined based on the meaning of the term and the overall content of the present invention, not simply the name of the term.

When it is said that a certain part "includes" a certain component throughout the specification, it means that it may further include other components without excluding other components unless otherwise stated. In addition, terms such as "...unit" and "module" described in the specification mean a unit that processes at least one function or operation, which may be implemented as hardware or software or a combination of hardware and software. .

Hereinafter, with reference to the accompanying drawings, embodiments of the present invention will be described in detail so that those skilled in the art can easily carry out the present invention. However, the present invention may be embodied in many different forms and is not limited to the embodiments described herein. And in order to clearly explain the present invention in the drawings, parts irrelevant to the description are omitted, and similar reference numerals are attached to similar parts throughout the specification.

1 shows a network connection structure of a block data storage system 130 according to an embodiment of the present invention.

Referring to FIG. 1 , a block data storage system 100 is connected to a plurality of data generating devices 111 , 112 , and 113 and a monitoring system 120 through a communication network 140 . The block data storage system 100 may store data transmitted from the plurality of data generating devices 111 , 112 , and 113 through the communication network 140 . The data generating devices 111, 112, and 113 may include, for example, cameras and CCTVs.

The block data storage system 130 may include a storage device including a data storage area for storing data and a controller for controlling the storage device. A detailed configuration of the data storage area of the block data storage system 130 will be described later with reference to FIGS. 2 and 3 .

In one embodiment, the monitoring system 120 may receive data generated by the data generating devices 111 , 112 , and 113 and stored in the block data storage system 130 to monitor data such as video. In another embodiment, the monitoring system 120 may directly receive data generated by the data generating devices 111, 112, and 113 to monitor data such as video.

The communication network 140 may provide wired or wireless communication between the data generating devices 111 , 112 , and 113 , the monitoring system 120 , and the block data storage system 130 . When the wired/wireless communication network 140 is implemented as a wireless communication network, a wireless mobile communication network composed of a Base Transceiver Station (BTS), a Mobile Switching Center (MSC), and a Home Location Register (HLR). can be used for data communication. In addition, when the communication network 140 is implemented as a wired communication network, it may be implemented as a network communication network, and data communication may be performed according to an Internet protocol such as TCP/IP (Transmission Control Protocol/Internet Protocol).

The monitor system 120 is a terminal used by a CCTV manager and the like, and includes a desktop PC, a smart phone, a tablet PC, a slate PC, a notebook computer, a digital broadcasting terminal, Personal Digital Assistants (PDAs), Portable Multimedia Players (PMPs), and the like.

2 is a diagram showing a data storage area of a storage device included in the block data storage system 130 according to an embodiment of the present invention.

Referring to FIG. 2 , the storage device includes a data storage area 210, and the data storage area 210 may include a meta data area 220 (purple block area) and a file data area (green block area). . The file data area may include a plurality of blocks 230 having the same size.

Data generated by the data generating devices 111 , 112 , and 113 may be stored in the data storage area 210 . The data storage area 210 may be divided into a plurality of blocks having the same size. In one embodiment, each block may be configured to have a size of 64 MB. In another embodiment, each block may be configured to have a size of 2 to the Nth power (MB). Preferably, each block may be configured to have a size of 2 to the N power such as 64 M or more, 128 MB, 256 MB, etc.

In the embodiment shown in FIG. 2 , the meta data area 220 includes one block and is shown as being located at the front of the data storage area 210, but the present invention is not limited to this embodiment, and the meta data area 220 is shown as including one block. Any other embodiment, such as the data area 220 including a plurality of blocks, located between a plurality of blocks of the data storage area 210, or located at the back of the data storage area 210, is also technical in the present invention. It can be included within the scope of thought.

The meta data area 220 may include meta information about the plurality of blocks 230 of the file data area. In one embodiment, the meta information includes information on the number of remaining blocks that can be allocated for data storage, block identification information to be allocated next, member index and block identification information allocated to each member index, data generation date and time of each block, and end date and time. , may include information about the assigned member index.

Each block 230 of the file data area may store data such as a video generated by the data generating devices 111 , 112 , and 113 . A different block 230 may be assigned to each of the data generating devices 111, 112, and 113 to store data.

When writing or reading data, the controller may perform a process of writing or reading data by detecting block information to be recorded or read block information based on the meta information of the meta data area 220 .

3 is a diagram showing the configuration of the meta data area 220 of the data storage area 210 according to an embodiment of the present invention.

Referring to FIG. 3 , the meta data area 220 may include allocation block information 310 , member information 320 , and block search information 330 .

The allocation block information 310 may include information on the number of remaining blocks that can be allocated for data storage and block identification information to be allocated next. Based on the allocation block information 310, the controller can check the number of remaining blocks (the size of the remaining data recording space) in which received data can be recorded, and when the capacity of the allocated block is full, the next allocation is performed. Block identification information can be checked.

The member information 320 may include a member index assigned to one or more data generating devices for identification of the data generating device and block identification information assigned to each member index. The controller can determine which data generating device generated the received data from header information of the received data.

After identifying the identification information of the data generating device, the controller may assign a member index to identify the identified data generating device and store it in the member information 320 . In addition, the controller may record in the block identification information of the member information 320 which block the data of the data generating device having the corresponding member index is stored in.

For example, member #1 is given as the member index for the data generator 111, member #2 is given as the member index for the data generator 112, and member is assigned as the member index for the data generator 113. #3 can be assigned. Also, when data of member #1 is recorded in block #1, block #3, and block #5, block identification information of member #1 may be block #1, block #3, and block #5. When data of member #2 is recorded in block #2 and block #4, block identification information of member #2 may be block #2 and block #4. When data of member #3 is recorded in block #6, block identification information of member #3 may be block #6. [Table 1] shows member indexes recorded in the member information 320, and [Table 2] shows block identification information allocated to each member index recorded in the member information 320.

[Table 1]

[Table 2]

The block search information 330 may include creation date and time of data recorded for each block, end date and time, and an assigned member index. Block search information 330 may be generated for all blocks in the file data area.

For example, if the data recorded in block #1 is video data continuously created by member #1 from 0:00 to 12:00 on December 23, 2020, the block search information 330 of block #1 is As described in [Table 3]. From the block search information 330, the controller can determine the date and time of creation, end date and member index of all blocks in the file data area.

[Table 3]

4 shows the configuration of each block 230 of the file data area of the data storage area 210 according to an embodiment of the present invention.

Each block 320 of the file data area may include file data 340 and an index list 350 . The file data 340 may include a plurality of frame data. The index list 350 may include location information of the block 320 of a plurality of frames, time information of a plurality of frames, and event information.

In one embodiment, the file data 340 may include H.264, MPEG-4 Part 10, Advanced Video Coding (MPEG-4 AVC) compliant video data, for example, I frames and P frames. . An I frame is an intra frame, which has a structure similar to JPEG image data and is not encoded with reference to other frames, so it is an image that can be independently decoded without performing a motion compensation operation. A P frame is an inter frame, and since it is encoded with reference to previous frames, a motion compensation operation must be performed by referring to previous frames, so it is an image that can be decoded by referring to previous frames. However, in the present invention, the data recorded in the file data 340 is not limited to video data compatible with H.264, and may include data in any format such as video, photos, and music of other codecs.

The index list 350 may be disposed at the rear end of the block 230. The controller sequentially records the file data 340 from the front end of the block 230, and when the remaining recording space of the block 230 remains as much as the capacity of the predetermined index list 350, the file data 340 After recording is finished, a list of frame location information, frame time information, and event information of the file data 340 recorded in the corresponding block 230 may be stored as the index list 350 . Table 4 shows an example of the configuration of the index list 350.

[Table 4]

The index list 350 of [Table 4] is the identification number of the frames (frame #1, frame #2, frame #3, frame #4, ??) recorded in the file data 340 of the corresponding block 230. , the physical location on the block 230 of each frame, the creation time of each frame (camera recording time), and event information (movement detection event on the camera, etc.). The controller may be able to search for a specific time of the camera-recorded image from the index list 350 .

For example, if the controller wants to search for a video of December 23, 2020 00:00:03 from member #1, the frame corresponding to December 23, 2020 00:00:03 from the index list 350 This is frame #9, and we can figure out that frame #9 is at the physical location of #0025 in block 230. Accordingly, the controller can detect data from the physical location of #0025 of block 230 and read image data after 00:00:03 on December 23, 2020.

The index list 350 may be separately stored in the cache, and thus each frame may be searched in a stream form even while a data block is being created. That is, even if not after the entire block 230 is written, a frame of a specific time can be searched using the index list stored in the cache.

5 is a flowchart of a data writing process in a block data storage method performed by the block data storage system 130 according to an embodiment of the present invention.

Referring to FIG. 5 , the data writing process may include first block storage (S510), second block storage (S520), third block storage (530), and block reallocation (540).

When data is received from a data generating device such as a camera in the case of performing a data recording process, the controller detects the identification number of the data generating device from which the data was generated from the header file of the received data, and data having the identification number. A member index corresponding to a generating device can be assigned.

Hereinafter, as shown in FIG. 1, data from two data generating devices 111 and 112 among three data generating devices 111, 112 and 113 are transmitted, and data from one data generating device 113 A case in which data is not transmitted and the transmitted data is stored in the block data storage system 130 is exemplified. The controller detects the identification number of the data generating device from the header of the received data, assigns member #1 as the member index for the data generating device 111, and assigns member #2 as the member index for the data generating device 112. can be granted.

In the first block storage step (S510), the controller allocates the first block (block #1) of the file data area to the data created by the first member (member #1), and the first member (member #1). ) may be sequentially stored in the first block (block #1). When the data generating device 111 is a camera, continuous video streaming data may be continuously transmitted to the block data storage system 130, and the controller of the block data storage system 130 transmits the continuous video streaming data to the first Blocks (Block #1) can be recorded sequentially.

In the second block storage step (S520), the controller allocates a second block (block #2) to the data created by the second member (member #2), and is generated by the second member (member #2). The resulting data may be sequentially stored in the second block (block #2). When the data generating device 112 is a camera, continuous video streaming data may be continuously transmitted to the block data storage system 130, and the controller of the block data storage system 130 transmits the continuous video streaming data to the second. Blocks (Block #2) can be recorded sequentially.

When the size of the data stored in the first block (block #1) reaches a predetermined threshold (the size of which only space for recording the index list remains in the block), a third block storage step (S530) may be performed. . In the third block storage step (S530), the controller converts data generated by the first member (member #1) into a third block (block #3) for data not stored in the first block (block #1). may be allocated, and the data of the first member (member #1) may be sequentially stored in the newly allocated third block (block #3).

Then, when all blocks of the file data area are allocated for the first member (member #1) or the second member (member #2), and data is recorded in all blocks (block #1 to block #N), , there is no space to record data in the file data area. In this case, the controller may reallocate the blocks for data storage in the order of the oldest date of creation.

For example, if the data creation time (camera shooting time) of the first block (block #1) is the oldest, the first block (block #1) is reallocated as a block for data storage, and new data is Can be overwritten in 1 block (block #1). Next, when the data generation time (camera shooting time) of the second block (block #2) is old, the second block (block #2) is reallocated as a block for data storage, and new data is stored in the second block (block #2). The block (block #2) can be overwritten.

6 is a flowchart of a data reading process in a block data storage method performed by the block data storage system 130 according to an embodiment of the present invention.

Referring to FIG. 6 , the data reading process may include an allocation block detection step ( S610 ), a block identification information detection step ( S620 ), and a frame location detection step ( S630 ).

When the frame data generated at the first recording time by the first data generating device is read, in the allocation block detection step (S610), the controller sends the first data generating device from the member information 320 of the meta data area. The assigned member index and the assigned block identification information can be detected.

For example, in a state in which the data of the data generating device 111 and the data generating device 112 are recorded in the file data area by the data writing process described with reference to FIG. When trying to read the video data created at 00:00:03 on the 23rd of the month, the controller reads the data of the member information 320 in the meta data area 220 and sends it to the data generating device 111 as member #1. It is possible to detect what is assigned as this member index and what block #1, block #3, and block #5 are assigned to member #1 (see [Table 1] and [Table 2]).

In the block identification information detection step ( S620 ), the controller may detect block identification information including the frame generated at the first recording time from the block search information 330 of the meta data area 220 .

In the example of [Table 3], the controller reads the data for block #1, block #3, and block #5 of the block search information 330 and blocks #1 on December 23, 2020 00: It can be determined that video data of 00:03 seconds exists.

In the frame position detection step (S630), the controller may detect position information of the block of the frame created at the first recording time from the index list of the file data area.

In the example of [Table 4], the controller reads the data of the index list 350 located at the rear end of block #1 and indicates that frame #9 is video data corresponding to 00:00:03 on December 23, 2020. It can be detected, and image data after 00:00:03 seconds on December 23, 2020 can be acquired by reading data from #0025, which is a physical location on the block of frame #9.

According to the above-described embodiment of the present invention, data of a certain size (eg, 64 MB) generated by the same data generating device is continuously stored in the same block, so that the data of a certain size is stored in a plurality of smaller capacities (eg, 64 MB). For example, compared to the conventional storage method in which a large amount of capacity is consumed to store metadata for a plurality of data pieces by being divided into pieces of 4 KB) and stored, the capacity of the storage device for storing data is reduced. It can be used efficiently and can achieve improved retrieval speed of stored data.

In addition, since the block data storage system according to an embodiment of the present invention includes a data storage structure different from a conventional storage method and is not compatible with other conventional storage methods, data leakage can be prevented.

The steps or processes described above may be implemented by hardware components, software components, and/or a combination of hardware components and software components. For example, the steps or processes described in the embodiments may include, for example, a processor, a controller, an arithmetic logic unit (ALU), a digital signal processor, a microcomputer, a field programmable array (FPA), a PLU It can be implemented using one or more general purpose or special purpose computers, such as a programmable logic unit (programmable logic unit), microprocessor, or any other device capable of executing and responding to instructions. A processing device may run an operating system (OS) and one or more software applications running on the operating system. A processing device may also access, store, manipulate, process, and generate data in response to execution of software. For convenience of understanding, there are cases in which one processing device is used, but those skilled in the art will understand that the processing device includes a plurality of processing elements and/or a plurality of types of processing elements. It can be seen that it can include. For example, a processing device may include a plurality of processors or a processor and a controller. Other processing configurations are also possible, such as parallel processors.

Software may include a computer program, code, instructions, or a combination of one or more of the foregoing, which configures a processing device to operate as desired or processes independently or collectively. You can command the device. Software and/or data may be any tangible machine, component, physical device, virtual equipment, computer storage medium or device, intended to be interpreted by or provide instructions or data to a processing device. , or may be permanently or temporarily embodied in a transmitted signal wave. Software may be distributed on networked computer systems and stored or executed in a distributed manner. Software and data may be stored on one or more computer readable media.

The method according to the embodiment may be implemented in the form of program instructions that can be executed through various computer means and recorded on a computer readable medium. The computer readable medium may include program instructions, data files, data structures, etc. alone or in combination. Program commands recorded on the medium may be specially designed and configured for the embodiment or may be known and usable to those skilled in the art. Examples of computer-readable recording media include magnetic media such as hard disks, floppy disks and magnetic tapes, optical media such as CD-ROMs and DVDs, and magnetic media such as floptical disks. - includes hardware devices specially configured to store and execute program instructions, such as magneto-optical media, and ROM, RAM, flash memory, and the like. Examples of program instructions include high-level language codes that can be executed by a computer using an interpreter, as well as machine language codes such as those produced by a compiler. The hardware devices described above may be configured to operate as one or more software modules to perform the operations of the embodiments, and vice versa.

As described above, although the embodiments have been described with limited examples and drawings, those skilled in the art can make various modifications and variations from the above description. For example, the described techniques may be performed in an order different from the method described, and/or components of the described system, structure, device, circuit, etc. may be combined or combined in a different form than the method described, or other components may be used. Or even if it is replaced or substituted by equivalents, appropriate results can be achieved.

Therefore, other implementations, other embodiments, and equivalents of the claims are within the scope of the following claims.

Claims (13)

a storage device including a data storage area for storing data; and
A controller for controlling the storage device
including,
The data storage area includes a file data area for storing data and a meta data area for storing meta information about the file data area,
The file data area is divided into a plurality of blocks having the same size;
Each block has a size of 64MB or more,
The controller sequentially stores the data generated by the first member, which is a data generating device, in one block;
The meta data area includes a member index assigned to each data generating device and block identification information assigned to each member index to identify the data generating device,
The data stored in one block is data generated in the same data generating device and stored sequentially,
The controller allocates a first block of the file data area to data generated by a first member, which is a data generating device, and sequentially stores data generated by the first member in the first block;
The controller allocates a second block of the file data area to data generated by a second member, which is a data generating device, and sequentially stores data generated by the second member in the second block;
When the size of the data stored in the first block reaches a predetermined threshold, the controller allocates a third block of the file data area to data created by the first member, and stores the data created by the first member. A block data storage system that sequentially stores data in a third block. According to claim 1,
The meta data area includes allocation block information, member information, and block search information,
The allocation block information includes information on the number of remaining blocks that can be allocated for data storage and block identification information to be allocated next,
The member information includes a member index assigned to one or more data generating devices for identification of the data generating device and block identification information assigned to each member index,
The block search information includes a creation date and time of data recorded for each block, an end date and time, and an assigned member index. According to claim 1,
Each block of the file data area includes file data and an index list,
The file data includes a plurality of frame data,
Wherein the index list includes location information on blocks of a plurality of frames, time information and event information of a plurality of frames. According to claim 1,
Each block of the file data area has a size of 64 M, 128 MB or 256 MB. delete delete According to claim 1,
The block data storage system of claim 1 , wherein the controller reallocates blocks for data storage in an order of oldest date and time when data is recorded in all blocks of the file data area. According to claim 1,
The meta data area includes allocation block information, member information, and block search information, the allocation block information includes information on the number of remaining blocks that can be allocated, and block identification information to be allocated next, and the member information includes one or more data generation It includes a member index assigned to the device for identification of the data generating device and block identification information assigned to each member index, and the block search information includes the date and time of creation, end date and time of data recorded for each block, and assigned block identification information. contains member indices;
Each block of the file data area includes file data and an index list, the file data includes a plurality of frame data, and the index list includes position information of a block of a plurality of frames, time information of a plurality of frames, and Include event information;
When the controller reads frame data generated at a first recording time by a first member that is a data generating device,
Detecting a member index assigned to a first member and assigned block identification information from the member information of the meta data area;
detecting block identification information including a frame generated at a first recording time from the block search information of the meta data area;
A block data storage system for detecting position information of a block of a frame created at a first recording time from the index list of the file data area. A block data storage method performed by a block data storage system including a storage device including a data storage area for storing data and a controller for controlling the storage device, the method comprising:
The data storage area includes a file data area for storing data and a meta data area for storing meta information about the file data area, the file data area is divided into a plurality of blocks having the same size, each block has a size greater than 64MB,
The meta data area includes a member index assigned to each data generating device and block identification information assigned to each member index to identify the data generating device,
The block data storage method,
A first block storage in which the controller allocates a first block of the file data area to data generated by a first member, which is a data generating device, and sequentially stores data generated by the first member in the first block. step; and
A second block storage in which the controller allocates a second block of the file data area to data generated by a second member, which is a data generating device, and sequentially stores data generated by the second member in the second block. step
including,
The data stored in one block is data generated in the same data generating device and stored sequentially,
The controller allocates a first block of the file data area to data generated by a first member, which is a data generating device, and sequentially stores data generated by the first member in the first block;
The controller allocates a second block of the file data area to data generated by a second member, which is a data generating device, and sequentially stores the data generated by the second member in the second block;
When the size of the data stored in the first block reaches a predetermined threshold, the controller allocates a third block of the file data area to data created by the first member, and stores the data created by the first member. Sequentially stored in the third block Block data storage method. According to claim 9,
When the size of the data stored in the first block reaches a predetermined threshold, the controller allocates a third block of the file data area for data created by the first member, and A block data storage method comprising a third block storage step of sequentially storing data in a third block. According to claim 9,
When data is recorded in all the blocks of the file data area, the controller reallocates blocks for data storage in the order of oldest date and time of creation. According to claim 9,
The meta data area includes allocation block information, member information, and block search information, the allocation block information includes information on the number of remaining blocks that can be allocated, and block identification information to be allocated next, and the member information includes one or more data generation It includes a member index assigned to the device for identification of the data generating device and block identification information assigned to each member index, and the block search information includes the date and time of creation, end date and time of data recorded for each block, and assigned block identification information. contains member indices;
Each block of the file data area includes file data and an index list, the file data includes a plurality of frame data, and the index list includes position information of a block of a plurality of frames, time information of a plurality of frames, and Include event information;
In the case of reading the frame data generated at the first recording time by the first data generating device,
an allocation block detection step in which the controller detects a member index assigned to the first data generating device and allocated block identification information from the member information of the meta data area;
a block identification information detection step in which the controller detects block identification information including a frame generated at a first recording time from the block search information of the meta data area; and
A frame position detection step in which the controller detects position information of a block of a frame created at a first recording time from an index list of the file data area.
Block data storage method comprising a. A program stored in a recording medium to perform the block data storage method according to any one of claims 9 to 12 by a computer.

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