CN112243015A - While-drilling downhole data storage platform and while-drilling data storage method - Google Patents
While-drilling downhole data storage platform and while-drilling data storage method Download PDFInfo
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- 238000005553 drilling Methods 0.000 title claims abstract description 113
- 238000013500 data storage Methods 0.000 title claims abstract description 71
- 238000000034 method Methods 0.000 title claims description 22
- 238000012545 processing Methods 0.000 claims abstract description 8
- 238000004891 communication Methods 0.000 claims description 13
- 238000005259 measurement Methods 0.000 description 10
- 230000005540 biological transmission Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 230000006870 function Effects 0.000 description 5
- 238000011161 development Methods 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000003384 imaging method Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 210000002445 nipple Anatomy 0.000 description 2
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- 230000015572 biosynthetic process Effects 0.000 description 1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/10—Protocols in which an application is distributed across nodes in the network
- H04L67/1097—Protocols in which an application is distributed across nodes in the network for distributed storage of data in networks, e.g. transport arrangements for network file system [NFS], storage area networks [SAN] or network attached storage [NAS]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/10—Protocols in which an application is distributed across nodes in the network
- H04L67/1001—Protocols in which an application is distributed across nodes in the network for accessing one among a plurality of replicated servers
- H04L67/1004—Server selection for load balancing
- H04L67/1012—Server selection for load balancing based on compliance of requirements or conditions with available server resources
Abstract
A downhole data storage while drilling platform, comprising: the system comprises at least 2 micro cloud storage nodes, a data storage unit and a data processing unit, wherein the micro cloud storage nodes are used for storing received while-drilling data; and the underground while drilling micro-cloud controller is connected with each micro-cloud storage node and is used for uniformly allocating the storage resources of each micro-cloud storage node. The underground while-drilling data storage platform can fully optimize and utilize the storage space of each micro cloud storage node in the underground while-drilling, comprehensively manage the storage space of each micro cloud storage node, and optimally store data acquired in the underground.
Description
Technical Field
The invention relates to the technical field of oil and gas exploration and development, in particular to a while-drilling downhole data storage platform and a while-drilling data storage method.
Background
In the exploration and development of petroleum and natural gas, well drilling is the most critical link. With the development of information technology, more and more downhole tools are installed in drilling assemblies during drilling. Therefore, in the drilling process, massive data (such as engineering parameters including temperature, pressure, torque, well deviation, azimuth and the like, and geological parameters including gamma, resistivity, density and the like) need to be processed and analyzed underground, so that the drilling is guided, and intelligent drilling is realized.
On the one hand, the existing processing and analysis of well data is limited by the transmission while drilling technology, for example, the commonly used transmission while drilling device is a mud pulser, the transmission rate is 0.25-4bit/s, and the highest transmission rate in the current commercial application is not more than 20 bit/s.
On the other hand, the existing downhole measurement systems all use embedded processors, the data acquisition function and the specific logic judgment function are closely combined, and the data acquisition function and the specific logic judgment function are usually completed by a single embedded processor, so that different devices or systems are required to be configured for completing different functions. And after each measurement-while-drilling short joint returns to the ground, the data stored in the memory is read out on the ground for later processing and application.
However, the data volume difference acquired by various measurement-while-drilling subs is large, some engineering parameters (such as temperature, pressure and other data) have less raw data, and some geological parameters (such as sound waves, resistivity imaging and the like) have very large data storage capacity due to the need of sampling raw signal waveforms.
In addition, the measurement-while-drilling nipple has uncertainty in the time of each time of downhole operation, the short time can be from several hours to dozens of hours, and the long time can be more than 200 hours, so that the demands for the capacity of the memory are very different.
The prior art can not meet the data storage requirement of the measurement while drilling nipple.
Disclosure of Invention
In order to solve the above problems, the present invention provides a downhole data storage platform while drilling, wherein the data storage platform comprises:
the system comprises at least 2 micro cloud storage nodes, a data storage unit and a data processing unit, wherein the micro cloud storage nodes are used for storing received while-drilling data;
and the underground while drilling micro-cloud controller is connected with each micro-cloud storage node and is used for uniformly allocating the storage resources of each micro-cloud storage node.
According to one embodiment of the invention, the micro cloud storage node comprises:
a memory module for storing while drilling data;
the microprocessor module is connected with the memory module and is used for writing while-drilling data into the memory module or reading while-drilling data from the memory module;
and the data communication module is connected with the microprocessor module and is used for realizing data communication between the microprocessor module and other micro-cloud storage nodes and the while-drilling downhole micro-cloud controller.
According to an embodiment of the present invention, the micro cloud storage node further includes:
and the real-time clock module is connected with the microprocessor module and is used for providing time data for the microprocessor.
According to one embodiment of the invention, when the storage space of one micro cloud storage node is insufficient or the memory is in a read-write error, the micro cloud storage node can call other micro cloud storage nodes to store corresponding data.
According to one embodiment of the invention, when the storage space of a micro cloud storage node is insufficient or the memory is in a read-write error, the micro cloud storage node is configured to generate data storage request information and storage capacity requirement information and send the data storage request information and the storage capacity requirement information to the while-drilling downhole micro cloud controller.
According to one embodiment of the invention, after receiving the data storage request information and the storage capacity requirement information, the while-drilling downhole micro-cloud controller is configured to:
responding to the data storage request information, and selecting a micro cloud storage node capable of being matched with the storage capacity request information from other micro cloud storage nodes according to the storage capacity request information to obtain an effective micro cloud storage node;
and transmitting the node information of the effective micro cloud node to a micro cloud storage node sending a data storage request.
According to an embodiment of the present invention, after receiving the node information of the valid storage node, the micro cloud storage node that sends the data storage request is configured to:
and sending the data to be stored to the effective micro cloud storage node according to a preset format so as to store the data by the micro cloud storage node.
According to an embodiment of the present invention, the micro cloud storage node further includes:
the engineering parameter sensor is connected with the microprocessor module and used for transmitting engineering parameter data generated in the working process to the microprocessor module so as to be sent to the memory module by the microprocessor module; and/or the presence of a gas in the gas,
and the geological parameter sensor is connected with the microprocessor module and is used for transmitting geological parameter data generated in the working process to the microprocessor module so as to be sent to the memory module by the microprocessor module.
The invention also provides a while drilling data storage method which is characterized by being implemented on the basis of the while drilling downhole storage device.
According to one embodiment of the invention, the method comprises:
when the fact that storage space of a first micro-cloud storage node is insufficient or a memory is read and written wrongly is detected, a first micro-cloud storage node generates data storage request information and storage capacity requirement information, and sends the data storage request information and the storage capacity requirement information to an underground micro-cloud controller communicated with the first micro-cloud storage node;
step two, the while-drilling downhole micro-cloud controller responds to the data storage request information, selects a micro-cloud storage node capable of being matched with the storage capacity request information from other micro-cloud storage nodes according to the storage capacity request information to obtain an effective micro-cloud storage node, and transmits the node information of the effective micro-cloud storage node to the first micro-cloud storage node;
and step three, the first micro cloud storage node sends data to be stored to the effective micro cloud storage node according to a preset format, so that the micro cloud storage node stores the data.
The underground while drilling data storage platform provided by the invention can fully optimize and utilize the storage space of each micro cloud storage node in the underground while drilling, comprehensively manage the storage space of each micro cloud storage node, and optimally store data acquired underground.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required in the description of the embodiments or the prior art:
FIG. 1 is a schematic structural diagram of a prior art drilling while drilling data acquisition and storage system;
FIG. 2 is a schematic structural diagram of a downhole data storage platform while drilling according to an embodiment of the invention;
FIG. 3 is a schematic structural diagram of a micro cloud storage node according to one embodiment of the present invention;
FIG. 4 is a schematic flow chart illustrating an implementation of a data storage while drilling method according to an embodiment of the invention.
Detailed Description
The following detailed description of the embodiments of the present invention will be provided with reference to the drawings and examples, so that how to apply the technical means to solve the technical problems and achieve the technical effects can be fully understood and implemented. It should be noted that, as long as there is no conflict, the embodiments and the features of the embodiments of the present invention may be combined with each other, and the technical solutions formed are within the scope of the present invention.
In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the embodiments of the invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without some of these specific details or with other methods described herein.
Additionally, the steps illustrated in the flow charts of the figures may be performed in a computer system such as a set of computer-executable instructions and, although a logical order is illustrated in the flow charts, in some cases, the steps illustrated or described may be performed in an order different than here.
Fig. 1 shows a schematic structure of a prior art drilling while drilling data acquisition and storage system.
As shown in fig. 1, the conventional while-drilling data acquisition and storage system includes: a derrick and surface power system 101, drill pipe 102, wellbore 104, drill bit 105, downhole measurement while drilling 106, and telemetry while drilling 107.
The drill pipe 102, the telemetry while drilling device 107, the downhole measurement while drilling device 106, and the drill bit 105 form a downhole drilling assembly that are coupled together by mechanical fasteners. The derrick and surface power system 101 rotates the entire downhole drilling assembly and downhole into the formation 103 and forms a wellbore 104.
During drilling, the LWD device 106 is capable of measuring and collecting various while-drilling data, which may include engineering parameters such as well deviation, azimuth, temperature, pressure, etc., and may also include geological parameters such as gamma, resistivity, acoustic, etc.
The telemetry-while-drilling device 107 is in communication connection with the downhole measurement-while-drilling device 106. The measurement-while-drilling downhole measuring device 106 comprises one or more measurement-while-drilling pups, the measurement-while-drilling pups are connected together through a serial bus, and the remote-transmitting-while-drilling device 107 generally uses a mud pulser or an electromagnetic remote-transmitting-while-drilling device.
However, because the transmission speed of these while-drilling telemetry devices is very limited, the downhole measurement-while-drilling device 106 typically transmits only a small amount of critical measurement data to the while-drilling telemetry device 107, and then to the surface via the while-drilling telemetry device 107. A large amount of data collected by the measurement while drilling downhole measurement device 106 may be stored downhole and read out after the entire drilling assembly is tripped back to the surface.
In the prior art, the storage space for integrally managing each measurement-while-drilling short joint is lacked, and the data collected underground is difficult to store in an optimized mode.
Aiming at the problems in the prior art, the invention provides a novel underground data storage platform while drilling and a data storage method while drilling based on the same.
Fig. 2 shows a schematic structural diagram of the downhole data storage platform while drilling provided in this embodiment.
As shown in fig. 2, the downhole data storage platform while drilling provided in this embodiment preferably includes: a downhole micro-cloud controller 201 and at least 2 micro-cloud storage nodes (e.g., a first micro-cloud storage node 202 and a second micro-cloud storage node 203, etc. shown in the figure). The internal structures of the micro-cloud storage nodes are preferably the same, and the micro-cloud storage nodes can store received data while drilling. The downhole micro-cloud controller 201 is connected with each micro-cloud storage node, and can uniformly allocate storage resources of each micro-cloud storage node.
In this embodiment, the micro-cloud controller 201 is preferably in communication connection with each micro-cloud storage node and each storage node through a serial bus. Of course, in other embodiments of the present invention, according to actual needs, the data communication mode between the micro cloud controller 201 and each micro cloud storage may also adopt other reasonable modes, and the present invention is not limited thereto.
Since the structures of the respective micro cloud storage nodes are the same, for convenience of description, the internal structure and the operation principle of the micro cloud node are further described below by taking one of the micro cloud storage nodes as an example. Fig. 3 shows a schematic structural diagram of a micro cloud storage node in this embodiment.
As shown in fig. 3, in this embodiment, the micro cloud storage node includes: a microprocessor module 301, a data communication module 302, and a memory module 303. The memory module 303 is used for storing while drilling data. The microprocessor module 301 is connected to the memory module 303, and is capable of writing the received while-drilling data to the memory module 303 and reading the while-drilling data from the memory module 303 if necessary to transmit the read while-drilling data to an external device.
The data communication module 302 is connected with the microprocessor module 301, and is capable of realizing data communication between the microprocessor module 301 and other micro cloud storage nodes and the while-drilling downhole micro cloud controller 201. Therefore, the micro cloud storage node can send related data to other micro cloud nodes and the while-drilling downhole micro cloud controller 201, and meanwhile, the micro cloud storage node can also receive related data sent by other micro cloud nodes and the while-drilling downhole micro cloud controller 201.
In this embodiment, the data communication module 302 is preferably implemented by using a serial bus device, which can be used as a serial bus interface of a micro cloud storage node to connect with other micro cloud storage nodes and the downhole micro cloud controller 201 while drilling.
As shown in fig. 3, in this embodiment, the micro cloud storage node optionally further includes an engineering parameter sensor 304 and/or a geological parameter sensor 305. The engineering parameter sensor 304 is connected to the microprocessor module 301, and is capable of transmitting engineering parameter data generated during a working process to the microprocessor module 301, and then the engineering parameter data is transmitted to the memory module 303 by the microprocessor module 301, so that the engineering parameter data is stored.
Similarly, the geological parameter sensor 305 is also connected to the microprocessor module 301, and can transmit geological parameter data generated during the working process to the microprocessor module 301, and then the geological parameter data is sent to the memory module 303 by the microprocessor module 301, so as to realize the storage of the geological parameter data.
In this embodiment, the engineering parameters may preferably include well deviation, azimuth, temperature, pressure, etc., and the geological parameters may preferably include gamma, resistivity, acoustic, etc. Of course, in other embodiments of the present invention, the data collected by the geological parameter sensor and/or the engineering parameter sensor may only include one or more of the listed items, and may also include other reasonable items not listed, according to actual needs, and the present invention is not limited to this.
The existing measurement-while-drilling device is limited by self data transmission performance and data storage performance, and usually only some important data while drilling can be measured or stored, so that the data finally used for analysis cannot comprehensively reflect the current geological state and engineering state.
In the embodiment, because the micro cloud storage node is provided with the engineering parameter sensor and the geological parameter sensor, the micro cloud storage node can realize the comprehensive measurement and storage of the while-drilling data, so that the problem that the prior downhole data storage equipment cannot comprehensively measure and store the while-drilling data because the prior while-drilling measuring device is adopted as a source of the while-drilling data is solved.
Meanwhile, it should be noted that in other embodiments of the present invention, according to actual needs, the micro cloud storage node may not be configured with an engineering parameter sensor and/or a geological parameter sensor, but use an existing measurement while drilling device as a data source.
In this embodiment, according to actual needs, the micro cloud storage node may further include a real-time clock module 306. In this embodiment, the microprocessor module 301 can process the received signals through an internal signal processing and acquiring unit, so as to obtain corresponding while-drilling data. The real-time clock module 306 can provide a time reference for data acquisition and data storage, and thus can provide a basis for related data processing (e.g., time-to-depth conversion) after the data is returned to the surface.
As shown in fig. 3, optionally, in this embodiment, the micro cloud storage node may further include a configuration and system upgrade module 307. The configuration and system upgrade module 307 is connected to the micro processing module 301, and by using the configuration and system upgrade module 307, a user can implement parameter configuration and system upgrade on the micro cloud storage node, so that the availability, applicability and expansibility of the micro cloud storage node and the whole data storage platform are improved.
It should be noted that in other embodiments of the present invention, the micro cloud storage node may also be implemented by using other reasonable structures according to actual needs, and the present invention is not limited to this.
In this embodiment, the while-drilling downhole micro-cloud controller 201 serves as a while-drilling downhole orchestration and coordination controller, and can allocate memory resources of each micro-cloud storage node in a unified manner. And each micro cloud storage node is provided with a uniform communication protocol program access inlet, the communication protocol program access inlet is an application program interface, and the application program accesses the cloud storage space by calling the application program access inlet. Each micro cloud storage node is provided with a data storage module, and the data storage modules can be used by any node in the data storage platform.
Specifically, in this embodiment, when a storage space of a certain micro cloud storage node in the data storage platform is insufficient or a memory read/write error occurs, the micro cloud storage node can call other micro cloud storage nodes to store corresponding data.
FIG. 4 shows a flowchart of an implementation of the data storage while drilling method in the present embodiment. In the implementation flowchart, for example, the first micro cloud storage node 202 cannot meet the current storage requirement, and the second micro cloud storage 203 can meet the current storage requirement. It should be noted that the first micro cloud storage node 202 and the second micro cloud storage node 203 are taken as examples to illustrate the principle and the point of the present invention more clearly, and are not limited to specific micro cloud storage nodes.
As shown in fig. 4, when the first micro cloud storage node has a storage space or memory read/write error, the first micro cloud storage node 202 preferably generates data storage request information and storage capacity requirement information in step S401. The data storage request information can represent that the data storage request information cannot normally meet the current data storage requirement, and the storage capacity requirement information can represent the size of the storage capacity required by the current data to be stored.
After generating the data storage request information and the storage capacity requirement information, in this embodiment, the first micro cloud storage node 202 preferably sends the data storage request information and the storage capacity requirement information generated by itself to the downhole micro cloud controller 201 communicatively connected thereto in step S402.
In this embodiment, after receiving the data storage request information and the storage capacity requirement information, the while-drilling downhole micro-cloud controller 201 responds to the data storage request information in step S403 to select a micro-cloud storage node capable of matching the storage capacity request information from other micro-cloud storage nodes according to the storage capacity request information, and the selected micro-cloud storage node (for example, the second micro-cloud storage node 203) may be used as a current effective micro-cloud storage node.
In this embodiment, the while-drilling downhole micro-cloud controller 201 preferably sends a storage space query instruction to all online micro-cloud storage nodes in a polling manner. When the virtual micro cloud nodes meet the required storage space size, the micro cloud storage nodes return relevant information to the while-drilling downhole micro cloud controller 201, and then the while-drilling downhole micro cloud controller 201 selects effective micro cloud storage nodes from the micro cloud storage nodes meeting the required storage space size.
Of course, in other embodiments of the present invention, the while-drilling downhole micro cloud controller 201 may also select an effective micro cloud storage node from other micro cloud storage nodes according to the storage capacity request information in other reasonable manners, which is not specifically limited in the present invention.
As shown in fig. 4, after obtaining the valid micro cloud storage nodes, the downhole micro cloud controller 201 preferably feeds back node information of the valid micro cloud storage nodes to the micro cloud storage node (i.e., the first micro cloud storage node 202) sending the data storage request in step S404.
After receiving the node information of the effective micro cloud storage node fed back by the downhole micro cloud controller 201 while drilling, the first micro cloud storage node 202 sends the data to be stored to the effective micro cloud storage node (i.e., the second micro cloud storage node 203) according to a preset format in step S405, so that the micro cloud storage node stores the data in step S406. Therefore, the effective micro cloud storage nodes can store the data which should be stored by the first micro cloud storage node instead, and overall management and distribution of the data storage space on the whole data storage platform are realized.
The underground while drilling data storage platform provided by the invention can fully optimize and utilize the storage space of each micro cloud storage node in the underground while drilling, comprehensively manage the storage space of each micro cloud storage node, and optimally store data acquired underground.
For example, taking resistivity imaging data while drilling as an example, a conventional 16Gbit memory can generally store 150 hours of raw data. And if other short energy-saving shared storage spaces for measurement while drilling exist, the storage requirement of more than 200 hours, namely about 8 days of data, can be easily met, and the method can meet the storage requirement of the longest one-time drilling at present.
It is to be understood that the disclosed embodiments of the invention are not limited to the particular structures or process steps disclosed herein, but extend to equivalents thereof as would be understood by those skilled in the relevant art. It is also to be understood that the terminology used herein is for the purpose of describing particular embodiments only, and is not intended to be limiting.
Reference in the specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the invention. Thus, the appearances of the phrase "one embodiment" or "an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment.
While the above examples are illustrative of the principles of the present invention in one or more applications, it will be apparent to those of ordinary skill in the art that various changes in form, usage and details of implementation can be made without departing from the principles and concepts of the invention. Accordingly, the invention is defined by the appended claims.
Claims (10)
1. A downhole data storage platform while drilling, the data storage platform comprising:
the system comprises at least 2 micro cloud storage nodes, a data storage unit and a data processing unit, wherein the micro cloud storage nodes are used for storing received while-drilling data;
and the underground while drilling micro-cloud controller is connected with each micro-cloud storage node and is used for uniformly allocating the storage resources of each micro-cloud storage node.
2. The data storage platform of claim 1, wherein the micro cloud storage node comprises:
a memory module for storing while drilling data;
the microprocessor module is connected with the memory module and is used for writing while-drilling data into the memory module or reading while-drilling data from the memory module;
and the data communication module is connected with the microprocessor module and is used for realizing data communication between the microprocessor module and other micro-cloud storage nodes and the while-drilling downhole micro-cloud controller.
3. The data storage platform of claim 2, wherein the micro cloud storage node further comprises:
and the real-time clock module is connected with the microprocessor module and is used for providing time data for the microprocessor.
4. The data storage platform as claimed in any one of claims 1 to 3, wherein when the storage space of a micro cloud storage node is insufficient or the storage read/write error occurs, the micro cloud storage node can call other micro cloud storage nodes to store corresponding data.
5. The data storage platform of claim 4, wherein when a micro cloud storage node has insufficient storage space or memory read/write errors, the micro cloud storage node is configured to generate data storage request information and storage capacity requirement information and send the data storage request information and the storage capacity requirement information to the while-drilling downhole micro cloud controller.
6. The data storage platform of claim 5, wherein upon receiving data storage request information and storage capacity requirement information, the downhole while drilling micro-cloud controller is configured to:
responding to the data storage request information, and selecting a micro cloud storage node capable of being matched with the storage capacity request information from other micro cloud storage nodes according to the storage capacity request information to obtain an effective micro cloud storage node;
and transmitting the node information of the effective micro cloud node to a micro cloud storage node sending a data storage request.
7. The data storage platform of claim 6, wherein upon receiving the node information for the active storage node, the micro cloud storage node sending the data storage request is configured to:
and sending the data to be stored to the effective micro cloud storage node according to a preset format so as to store the data by the micro cloud storage node.
8. The data storage platform of any one of claims 2 to 7, wherein the micro cloud storage node further comprises:
the engineering parameter sensor is connected with the microprocessor module and used for transmitting engineering parameter data generated in the working process to the microprocessor module so as to be sent to the memory module by the microprocessor module; and/or the presence of a gas in the gas,
and the geological parameter sensor is connected with the microprocessor module and is used for transmitting geological parameter data generated in the working process to the microprocessor module so as to be sent to the memory module by the microprocessor module.
9. A method for storing data while drilling, which is implemented on the basis of the downhole storage while drilling device as claimed in any one of claims 1-8.
10. The method of claim 9, wherein the method comprises:
when the fact that storage space of a first micro-cloud storage node is insufficient or a memory is read and written wrongly is detected, a first micro-cloud storage node generates data storage request information and storage capacity requirement information, and sends the data storage request information and the storage capacity requirement information to an underground micro-cloud controller communicated with the first micro-cloud storage node;
step two, the while-drilling downhole micro-cloud controller responds to the data storage request information, selects a micro-cloud storage node capable of being matched with the storage capacity request information from other micro-cloud storage nodes according to the storage capacity request information to obtain an effective micro-cloud storage node, and transmits the node information of the effective micro-cloud storage node to the first micro-cloud storage node;
and step three, the first micro cloud storage node sends data to be stored to the effective micro cloud storage node according to a preset format, so that the micro cloud storage node stores the data.
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