CN110378037B - CFD simulation data storage method and device based on Ceph and server - Google Patents
CFD simulation data storage method and device based on Ceph and server Download PDFInfo
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- 238000004088 simulation Methods 0.000 title claims abstract description 111
- 238000013500 data storage Methods 0.000 title claims abstract description 34
- 238000000034 method Methods 0.000 title claims abstract description 33
- 239000012530 fluid Substances 0.000 claims abstract description 9
- 238000004422 calculation algorithm Methods 0.000 claims description 15
- 238000004364 calculation method Methods 0.000 claims description 12
- 238000004590 computer program Methods 0.000 claims description 10
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- 238000012986 modification Methods 0.000 description 2
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Abstract
The invention discloses a CFD simulation data storage method, a device, a server and a computer readable storage medium based on Ceph, wherein the method comprises the following steps: the server acquires and stores a description file of the CFD (computational fluid dynamics) example; wherein the description file comprises CFD example parameters; according to the CFD example parameters, receiving and storing simulation data corresponding to the CFD example from a preset field variable interface; the preset field variable interface is a librados C + + expansion interface; according to the CFD example parameter, simulation data corresponding to the CFD example is received and stored from a preset field variable interface, and a description file is used for expressing the logical relationship between the simulation data of the CFD example and the CFD example parameter, so that the simulation data can be accurately stored and searched; and the storage support of the simulation data of the field variables is provided through the setting of the preset field variable interface, so that the mass simulation data of the CFD can be conveniently and reliably stored on the Ceph cluster.
Description
Technical Field
The invention relates to the technical field of distributed storage, in particular to a CFD simulation data storage method and device based on Ceph, a server and a computer readable storage medium.
Background
With the development of modern society science and technology, distributed storage systems are widely applied. Ceph (a distributed storage system) is a unified distributed storage system, and is designed to provide better performance, reliability and expandability. The Ceph project originally originated from work during the period when Sage read (the earliest results were published in 2004) and subsequently contributed to the open source community. After years of development, the cloud computing system is supported by a plurality of cloud computing manufacturers and is widely applied.
Computational Fluid Dynamics (CFD) is a system of Naver-Stokes equations that describes flow discretely using numerical methods, and then obtains a solution that describes the flow problem approximately with the aid of resources such as computation and storage of modern computers. For practical engineering problems, CFD numerical calculations (simulations) produce a large amount of calculation result data. In particular, the direct solution of the Navier-Stokes equation to study the turbulence problem poses a higher challenge to the storage of the calculation results (simulation data).
Therefore, how to utilize a distributed storage system to safely and reliably store a large amount of calculation result data of CFD examples is an urgent problem to be solved today.
Disclosure of Invention
The invention aims to provide a CFD simulation data storage method, a device, a server and a computer readable storage medium based on Ceph, which are used for safely and reliably storing simulation data obtained by CFD example simulation calculation.
In order to solve the technical problem, the invention provides a CFD simulation data storage method based on Ceph, which comprises the following steps:
the server acquires and stores a description file of the CFD (computational fluid dynamics) example; wherein the description file comprises CFD example parameters;
receiving and storing simulation data corresponding to the CFD example from a preset field variable interface according to the CFD example parameters; the preset field variable interface is a librados C + + expansion interface.
Optionally, the server obtains and stores a description file of the CFD example, including:
acquiring user information corresponding to the description file;
judging whether a storage pool corresponding to the user information exists or not;
if yes, storing the description file in the storage pool;
if not, creating the storage pool, and storing the description file in the storage pool;
correspondingly, the receiving and storing simulation data corresponding to the CFD example from a preset field variable interface according to the CFD example parameters includes:
storing the emulation data to the storage pool.
Optionally, the storing the simulation data in the storage pool includes:
and storing the simulation data into the placement group stored in the description file.
Optionally, the storing the description file to the storage pool includes:
judging whether a target description file is stored in the storage pool or not; wherein, the target description file is a description file corresponding to the CFD example parameter;
and if so, storing the description file into a placement group stored in the target description file.
Optionally, the CFD example parameters include: start time, time step, end time, calculation model, turbulence model, and example name.
Optionally, the preset field variable interface includes: scalar interfaces, vector interfaces, and second order tensor interfaces.
Optionally, the method further includes:
reading the stored description file;
and searching the stored simulation data according to the CFD example parameters, and outputting the simulation data through the preset field variable interface.
The invention also provides a CFD simulation data storage device based on Ceph, which comprises:
the first storage module is used for acquiring and storing the description file of the CFD (computational fluid dynamics) example; wherein the description file comprises CFD example parameters;
the second storage module is used for receiving and storing simulation data corresponding to the CFD example from a preset field variable interface according to the CFD example parameters; the preset field variable interface is a librados C + + expansion interface.
The present invention also provides a server, comprising:
a memory for storing a computer program;
a processor for implementing the steps of the Ceph-based CFD simulation data storage method according to any of the above claims when executing the computer program.
The invention also provides a computer readable storage medium having stored thereon a computer program which, when executed by a processor, carries out the steps of the above Ceph based CFD simulation data storage method according to any one of the preceding claims.
The invention provides a CFD simulation data storage method based on Ceph, which comprises the following steps: the server acquires and stores a description file of the CFD (computational fluid dynamics) example; wherein the description file comprises CFD example parameters; according to the CFD example parameters, receiving and storing simulation data corresponding to the CFD example from a preset field variable interface; the field variable interface is a librados C + + expansion interface;
therefore, according to the CFD example parameters, the simulation data corresponding to the CFD example is received and stored from the preset field variable interface, and the description file is used for expressing the logical relationship between the simulation data of the CFD example and the CFD example parameters, so that the simulation data can be accurately stored and searched; and the existing librados interface is expanded by setting a preset field variable interface, so that the storage support of the simulation data of the field variable is provided, and the mass simulation data of the CFD can be conveniently, quickly and reliably stored on the Ceph cluster. In addition, the invention also provides a CFD simulation data storage device, a server and a computer readable storage medium based on the Ceph, and the beneficial effects are also achieved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a flowchart of a CFD simulation data storage method based on Ceph according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a simulation data storage flow of a CFD solver according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of reading and writing of simulation data of a CFD solver according to an embodiment of the present invention;
fig. 4 is a block diagram of a CFD simulation data storage device based on Ceph according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, fig. 1 is a flowchart illustrating a CFD simulation data storage method based on Ceph according to an embodiment of the present invention. The method can comprise the following steps:
step 101: the server acquires and stores a description file of the CFD example; wherein the description file comprises CFD example parameters.
It should be noted that the server in this embodiment may be a server in a Ceph cluster. The description file of the CFD example received by the server in this step may be an interface file for expressing a logical relationship between simulation data (calculation result) of the CFD example and CFD example parameters, that is, an interface file for reading and writing CFD example parameters (metadata) of the CFD example. That is, each CFD algorithm may correspond to a description file.
Specifically, the specific format and content of the description file of the CFD algorithm in this step may be set by the designer and the user practical scenario and the user requirement, for example, the format of the description file may be set in the same or similar manner as the existing OpenFOAM (an object-oriented CFD class library) algorithm description file, and the CFD algorithm parameters in the description file may include parameters such as initial conditions, boundary conditions, flow models, and time steps of the CFD algorithm, such as start time, time steps, end time, calculation models, turbulence models, and algorithm names. The embodiment does not limit the simulation data corresponding to the CFD example parameters as long as the server can determine the simulation data using the description file.
Correspondingly, the specific way of the server in this step for acquiring the description file of the CFD example may be set by the designer, for example, the description file of the CFD example input by the user may be directly received; the description file of the CFD example may also be generated according to the CFD example parameters input by the user, which is not limited in this embodiment.
Step 102: according to the CFD example parameters, receiving and storing simulation data corresponding to the CFD example from a preset field variable interface; the preset field variable interface is a librados C + + expansion interface.
It can be understood that, since the Ceph provides a data storage manner for objects, blocks, and files, a data storage interface provided by the Ceph is not suitable for storing simulation data (various field variables) of the CFD example, in this embodiment, according to characteristics of the simulation data of the CFD example, a data storage interface (C + + interface) for receiving and storing the simulation data of the CFD example, that is, a librados C + + expansion interface (C + + interface of the Ceph library) is expanded on the basis of an original librados interface (an original ecological unified interface of the Ceph cluster).
That is to say, the preset field variable interface in this embodiment may be a data storage interface that is extended on the basis of the librados interface and is used for receiving various field variables in the simulation data of the CFD example. The specific number and type of the preset field variable interfaces can be set by a designer according to a practical scene and user requirements, for example, because the commonly used field variables in the simulation data mainly include field variables such as pressure (scalar), velocity (vector), stress (second order tensor), and the like, the field variables can be divided into a scalar field, a vector field, and a second order tensor field according to field variable components, that is, the preset field variable interfaces in this embodiment may include scalar interfaces, vector interfaces, and second order tensor interfaces. The present embodiment does not limit the simulation data of the CFD algorithm to any value as long as the simulation data can be received by using the preset field variable interface.
Correspondingly, the preset field variable interface in this embodiment may be a data read-write interface, and may not only receive the simulation data through the preset field variable interface, but also output the simulation data through the preset field variable interface. That is to say, the method provided in this embodiment may further include the step of outputting, by the server, the stored simulation data through the preset field variable interface, for example, the server may search the description file of the stored CFD algorithm according to the data request output by the user, search the corresponding simulation data through reading the CFD algorithm parameter in the description file, and output the simulation data through the preset field variable interface. Namely, the method provided by the embodiment may further include the server reading the stored description file of the CFD example; and searching the stored corresponding simulation data according to the CFD example parameters corresponding to the description file, and outputting the simulation data through a preset field variable interface.
Specifically, the specific storage manner of the server for the received description file of the CFD example and the corresponding simulation data in this embodiment may be set by a designer or a user, for example, the description file of the CFD example and the corresponding simulation data may be stored in a storage pool of the user; namely, after receiving the description file of the CFD example, judging that the storage pool corresponding to the user information exists according to the user information corresponding to the description file; if the simulation data exists, the description file is stored in the storage pool, and the corresponding simulation data is also stored in the storage pool; if the user information does not exist, the storage pool corresponding to the user information can be created, the description file is stored in the newly created storage pool, and the corresponding simulation data is also stored in the storage pool where the description file is located later. The description files of the CFD arithmetic examples and the corresponding simulation data can be stored in the same Placing Group (PG) in the storage pool of the user, so that the data fault domains with different levels can be set through a plurality of sets of local mechanisms, and the safety and the stability of the data are further improved; that is, when a description file is stored in a storage pool corresponding to user information, the whole description file may be stored in a placement group of the storage pool, and when emulation data corresponding to the description file is stored in the storage pool later, the emulation data may be stored in the placement group in which the description file is stored. The present embodiment does not set any limit to this.
Furthermore, the server can store the description files of a plurality of related CFD (computational fluid dynamics) examples of the same user and corresponding simulation data into the same placing group; that is, when the current description file is stored in the storage pool corresponding to the user information, it may be checked whether a previously stored description file (target description file) and/or simulation data corresponding to the CFD algorithm parameter exists in the storage pool according to the CFD algorithm parameter in the current description file, such as the previously stored description file and/or simulation data of the CFD algorithm under the same working condition as the CFD algorithm currently needed to be stored; if the CFD example parameter exists in the description file, storing the current description file in a placement group in which the description file and/or the simulation data corresponding to the CFD example parameter are stored; if not, any of the placement groups (e.g., an empty placement group) in the storage pool may be selected to store the current description file. That is, storing the description file into the storage pool corresponding to the user information may include: judging whether a storage pool corresponding to the user information stores a target description file or not; wherein, the target description file is a description file corresponding to the CFD example parameters; and if so, storing the description file into a placement group stored in the target description file.
It should be noted that, this embodiment is shown by taking the receiving and storing of the description file and the simulation data of one CFD example by the server as an example, and the receiving, storing and outputting of the description file and the simulation data of multiple CFD examples by the server may be implemented in a manner the same as or similar to that provided by this embodiment, which is not limited in this embodiment.
Specifically, as shown in fig. 2 and fig. 3, a CFD solver (e.g., a computer) may input CFD example parameters (example configuration parameters) of a CFD example input by a user into a metadata file generation description file and send the file to Ceph, then start to calculate, call a librados C + + extension interface of Ceph at an output interval, and store simulation data (calculation result data) into a corresponding PG in a RADOS object storage system of Ceph.
In the embodiment, the simulation data corresponding to the CFD example is received and stored from the preset field variable interface according to the CFD example parameters, and the description file is used for expressing the logical relationship between the simulation data of the CFD example and the CFD example parameters, so that the simulation data can be accurately stored and searched; and the existing librados interface is expanded by setting a preset field variable interface, so that the storage support of the simulation data of the field variable is provided, and the mass simulation data of the CFD can be conveniently, quickly and reliably stored on the Ceph cluster.
Referring to fig. 4, fig. 4 is a block diagram illustrating a CFD emulation data storage device based on Ceph according to an embodiment of the present invention. The apparatus may include:
the first storage module 10 is used for acquiring and storing a description file of the CFD example; wherein the description file comprises CFD example parameters;
the second storage module 20 is configured to receive and store simulation data corresponding to the CFD example from a preset field variable interface according to the CFD example parameter; the preset field variable interface is a librados C + + expansion interface.
Optionally, the first storage module 10 may include:
the information acquisition submodule is used for acquiring user information corresponding to the description file;
the judging submodule is used for judging whether a storage pool corresponding to the user information exists or not;
the first storage submodule is used for storing the description file into a storage pool corresponding to the user information if the description file exists; and if the description file does not exist, creating a storage pool corresponding to the user information, and storing the description file in the storage pool corresponding to the user information.
Correspondingly, the second storage module 20 may include:
and the second storage submodule is used for storing the simulation data in the storage pool corresponding to the user information.
Optionally, the third storage submodule may include:
and the first storage unit is used for storing the simulation data into the placement group stored in the description file.
Optionally, the first storage submodule may include:
the judging unit is used for judging whether the storage pool stores the target description file or not; wherein, the target description file is a description file corresponding to the CFD example parameters;
and the second storage unit is used for storing the description file into the placement group stored in the target description file if the description file exists.
Optionally, the apparatus may further include:
the reading module is used for reading the stored description file;
and the output module is used for searching the stored simulation data according to the CFD example parameters and outputting the simulation data through a preset field variable interface.
In this embodiment, the second storage module 20 receives and stores simulation data corresponding to the CFD example from the preset field variable interface according to the CFD example parameters, and the description file is used to express a logical relationship between the simulation data of the CFD example and the CFD example parameters, so as to accurately store and search the simulation data; and the existing librados interface is expanded by setting a preset field variable interface, so that the storage support of the simulation data of the field variable is provided, and the mass simulation data of the CFD can be conveniently and reliably stored on the Ceph cluster.
An embodiment of the present invention further provides a server, including: a memory for storing a computer program; a processor for implementing the steps of the Ceph-based CFD simulation data storage method as provided in the above embodiments when executing the computer program.
In addition, an embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the steps of the method for storing CFD simulation data based on Ceph provided in the foregoing embodiment are implemented.
The embodiments are described in a progressive mode in the specification, the emphasis of each embodiment is on the difference from the other embodiments, and the same and similar parts among the embodiments can be referred to each other. The device, the server and the computer-readable storage medium disclosed in the embodiments correspond to the method disclosed in the embodiments, so that the description is simple, and the relevant points can be referred to the description of the method part.
The steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. A software module may reside in Random Access Memory (RAM), memory, Read Only Memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.
The CFD simulation data storage method, device, server and computer-readable storage medium based on Ceph provided by the present invention are described in detail above. The principles and embodiments of the present invention have been described herein using specific examples, which are presented only to assist in understanding the method and its core concepts of the present invention. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (9)
1. A CFD simulation data storage method based on Ceph is characterized by comprising the following steps:
the Ceph server acquires and stores the description file of the CFD example; wherein the description file comprises CFD example parameters;
according to the CFD example parameters, receiving and storing simulation data corresponding to the CFD example from a preset field variable interface; the simulation data is calculation result data obtained by calculating a CFD example corresponding to the CFD example parameter by a CFD solver; the preset field variable interface is a data storage interface which is expanded on the basis of a librados interface and is used for receiving various field variables in simulation data of the CFD (computational fluid dynamics) example;
the CFD simulation data storage method based on the Ceph further comprises the following steps:
reading the stored description file;
and searching the stored simulation data according to the CFD example parameters, and outputting the simulation data through the preset field variable interface.
2. The Ceph-based CFD simulation data storage method according to claim 1, wherein the Ceph server obtains and stores a description file of CFD examples, including:
acquiring user information corresponding to the description file;
judging whether a storage pool corresponding to the user information exists or not;
if yes, storing the description file in the storage pool;
if not, creating the storage pool and storing the description file in the storage pool;
correspondingly, the receiving and storing simulation data corresponding to the CFD example from a preset field variable interface according to the CFD example parameters includes:
storing the emulation data to the storage pool.
3. The Ceph-based CFD simulation data storage method according to claim 2, wherein said storing the simulation data to the storage pool comprises:
and storing the simulation data into the placement group stored in the description file.
4. The Ceph-based CFD simulation data storage method according to claim 3, wherein said storing the description file to the storage pool comprises:
judging whether a target description file is stored in the storage pool or not; wherein, the target description file is a description file corresponding to the CFD example parameter;
and if so, storing the description file into a placement group stored in the target description file.
5. The method of claim 1, wherein the CFD algorithm parameters comprise: start time, time step, end time, calculation model, turbulence model, and example name.
6. The Ceph-based CFD simulation data storage method according to claim 1, wherein the preset field variable interface comprises: scalar interfaces, vector interfaces, and second order tensor interfaces.
7. A Ceph-based CFD simulation data storage device, comprising:
the first storage module is used for acquiring and storing the description file of the CFD (computational fluid dynamics) example; wherein the description file comprises CFD example parameters;
the second storage module is used for receiving and storing simulation data corresponding to the CFD example from a preset field variable interface according to the CFD example parameters; the simulation data are calculation result data obtained by a CFD solver calculating a CFD example corresponding to the CFD example parameters; the preset field variable interface is a data storage interface which is expanded on the basis of a librados interface and is used for receiving various field variables in simulation data of a CFD (computational fluid dynamics) example;
wherein, the CFD simulation data storage device based on Ceph further comprises:
the reading module is used for reading the stored description file;
and the output module is used for searching the stored simulation data according to the CFD example parameters and outputting the simulation data through the preset field variable interface.
8. A server, comprising:
a memory for storing a computer program;
a processor for implementing the steps of the Ceph-based CFD simulation data storage method according to any of claims 1 to 6 when executing said computer program.
9. A computer-readable storage medium, having stored thereon a computer program which, when being executed by a processor, carries out the steps of the Ceph-based CFD simulation data storage method according to any one of claims 1 to 6.
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| CN112306586A (en) * | 2020-11-20 | 2021-02-02 | 深圳前海微众银行股份有限公司 | Data processing method, device, equipment and computer storage medium |
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| CN107273056A (en) * | 2017-06-30 | 2017-10-20 | 郑州云海信息技术有限公司 | A kind of date storage method and device of Ceph file system |
| CN112306586A (en) * | 2020-11-20 | 2021-02-02 | 深圳前海微众银行股份有限公司 | Data processing method, device, equipment and computer storage medium |
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