KR101078213B1 - Method for managing CPU load of contents transmitting device and contents transmitting device thereof - Google Patents

Abstract

A CPU load management method of a content delivery device and a content delivery device thereof are disclosed. According to a preferred embodiment of the present invention, the optimum CPU utilization rate of the content transfer apparatus is calculated to adjust the process of the CPU so as to achieve the optimum CPU utilization rate without affecting the content transfer service to the client.

According to the present invention, the CPU of the content device can efficiently process and transmit the content, and the CPU can efficiently process and transmit the content without affecting service provision such as content provision. .

Content, CDN, Content Delivery Network, Cache, Origin

Description

Method for managing CPU load of contents transmitting device and contents transmitting device

The present invention relates to a CPU load management method of a content transmission device and a content transmission device, and more particularly, to a method capable of efficiently managing a CPU load of a device for transmitting content in a communication network and a content transmission device thereof. It is about.

With the development of communication networks, various types of contents such as voice, images, and video are transmitted and received through communication networks.

On the other hand, as the communication network becomes more complicated and the type and amount of content increase, the type and amount of content to be processed by the apparatus for transmitting and receiving such content is increasing.

Meanwhile, when content is transmitted through a communication network, the amount of transmission / reception of the content to be transmitted is determined according to the congestion, that is, the traffic and bandwidth between the transmitting side transmitting the content and the receiving side receiving the content. The transmission and reception of the content is made.

The digital processing device that receives the content processes the data according to a certain process such as storing or reading information, and transmits the data to another digital processing device if necessary.

In particular, as the communication network becomes more complicated in recent years, a two-way communication in which both content and other data or signals are received and transmitted, rather than one-way communication in which only one-sided communication is received or transmitted, is common. Most of the devices capable of processing data or signals to be included perform both reception and transmission instead of only receiving or transmitting.

Meanwhile, the content transmission device includes a processor for data processing including transmission and reception of content as a digital processing device, and includes a central processing unit (CPU) as a device for controlling the entire digital processing device including such a processor. It is included in the transmission device.

However, since the processing power of the CPU is limited, there is a problem in that the CPU cannot efficiently process and transmit the content when the data throughput including the transmission and reception of the content is greatly increased.

In addition, since the CPU cannot efficiently process and transmit the content, the receiving side of the content, that is, the receiving side of the service is not effectively received, and thus there is a problem in that the service is not satisfied.

In particular, in the conventional CPU management method, there is a problem in that QoS is not satisfied by simply arithmetically considering CPU load regardless of a quality of service (QoS) such as a content providing service.

In order to solve the conventional problems as described above, the present invention relates to a CPU load management method and a content transfer device of the content transfer device to enable the CPU to process and transmit the content efficiently.

Another object of the present invention is to propose a CPU load management method of a content transmission device and a content transmission device that allow a CPU to efficiently process and transmit content while satisfying a user for providing a service such as content delivery.

Still other objects of the present invention will be readily understood through the following description of the embodiments.

In order to achieve the above object, according to an aspect of the present invention, there is provided a CPU management method of a content transmission device.

According to a preferred embodiment of the present invention, a method of managing a central processing unit (CPU) of a content delivery device, comprising: calculating an optimal CPU utilization rate of the content delivery device; And (b) adjusting a process of the CPU so as to achieve the optimum CPU utilization rate without affecting the content transfer service to the client.

In step (b), if the CPU utilization rate of the content delivery device is adjusted based on the calculated optimal CPU usage rate, it is determined whether the content delivery service to the client is affected, and the determination result affects the content delivery service to the client. If not, adjust the process of the CPU to achieve the optimal CPU utilization.

The determination of whether the service affects the content transmission service to the client is determined using at least one of data transmission rate, data loss rate, and data transmission delay rate of the content transmitted to the client.

In the step (a), the optimal CPU utilization rate is selected from among input bandwidth, output bandwidth, size of received data, size of output data, and disk I / O (input / output) information which affects the process being executed by the CPU. It can be calculated using at least one further.

In the step (b), the adjustment of the process is performed during the interruption of at least one of the processes being executed by the CPU, the change of the execution method of the process being executed by the CPU, and the change of the execution order of the processes being executed by the CPU. It may be performed using at least one method.

In step (b), the adjustment of the process is further performed using at least one of an input bandwidth, an output bandwidth, a size of received data, a size of output data, and disk I / O information affecting a process being executed by the CPU. Can be done.

According to another aspect of the present invention, a content transmission device is provided.

According to a preferred embodiment of the present invention, in the content delivery device,

A CPU utilization calculator configured to calculate an optimal CPU utilization rate of the content transmission device; And a process adjusting unit for adjusting a process of the CPU so as to achieve the optimum CPU utilization rate without affecting the content transfer service to the client.

The content transmission device further includes a service speed calculation unit that determines whether the content transfer service to a client is affected when adjusting the CPU utilization rate of the content transmission device by the calculated optimal CPU usage rate, and the process adjustment unit comprises If the service rate calculation unit determines that the content transfer service to the client is not affected, the process of the CPU is adjusted to achieve the optimal CPU utilization rate.

In addition, the service rate calculator determines whether the content transmission service to the client is affected by using at least one of data transmission rate, data loss rate, and data transmission delay rate of the content transmitted to the client.

The CPU utilization calculator may further use at least one of an input bandwidth, an output bandwidth, a size of a received data, a size of an output data, and disk I / O (input / output) information affecting a process being executed by the CPU. Calculate optimal CPU utilization.

The process coordinator may include at least one method of stopping at least one process among processes being executed by the CPU, changing a method of executing a process being executed by the CPU, and changing a order of execution of the processes being executed by the CPU. Perform adjustment of the process.

The process adjusting unit further adjusts the process by using at least one of an input bandwidth, an output bandwidth, a size of received data, a size of output data, and disk I / O information that affects a process being executed by the CPU. .

According to another aspect of the present invention, there is provided a recording medium on which a program for implementing a CPU management method of a content transmission device is recorded.

According to a preferred embodiment of the present invention, a recording medium recording a program for implementing a method of managing a central processing unit (CPU) of a content delivery device, comprising: calculating an optimal CPU utilization rate of the content delivery device; And (b) adjusting a process of the CPU so as to achieve the optimum CPU utilization rate without affecting the content transfer service to the client. Is provided.

In step (b), if the CPU utilization rate of the content delivery device is adjusted based on the calculated optimal CPU utilization rate, it is determined whether the content delivery service to the client is affected. If there is no impact, adjust the CPU's process to achieve the optimal CPU utilization.

The determination of whether the service affects the content transmission service to the client is determined using at least one of data transmission rate, data loss rate, and data transmission delay rate of the content transmitted to the client.

In the step (a), the optimal CPU utilization rate is selected from among input bandwidth, output bandwidth, size of received data, size of output data, and disk I / O (input / output) information which affects the process being executed by the CPU. It can be calculated using at least one further.

In the step (b), the adjustment of the process is performed during the interruption of at least one of the processes being executed by the CPU, the change of the execution method of the process being executed by the CPU, and the change of the execution order of the processes being executed by the CPU. It may be performed using at least one method.

In step (b), the adjustment of the process is further performed using at least one of an input bandwidth, an output bandwidth, a size of received data, a size of output data, and disk I / O information affecting a process being executed by the CPU. Can be done.

As described above, the CPU load management method of the content delivery device and the content delivery device according to the present invention have the advantage that the CPU of the content delivery device can efficiently process and transmit content.

In addition, there is an advantage that the CPU can efficiently process and transmit the content without affecting the service provision, such as content provision.

As the invention allows for various changes and numerous embodiments, particular embodiments will be illustrated in the drawings and described in detail in the written description. However, this is not intended to limit the present invention to specific embodiments, it should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention.

Like reference numerals are used for like elements in describing each drawing. In the following description of the present invention, if it is determined that the detailed description of the related known technology may obscure the gist of the present invention, the detailed description thereof will be omitted.

Terms such as first and second may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another.

For example, without departing from the scope of the present invention, the first component may be referred to as the second component, and similarly, the second component may also be referred to as the first component.

And / or < / RTI > includes any combination of a plurality of related listed items or any of a plurality of related listed items.

When a component is said to be "connected" or "connected" to another component, it may be directly connected to or connected to that other component, but it may be understood that another component may exist in between. Should be.

On the other hand, when a component is said to be "directly connected" or "directly connected" to another component, it should be understood that there is no other component in between.

The terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting of the present invention.

Singular expressions include plural expressions unless the context clearly indicates otherwise. In this application, the terms "comprise" or "have" are intended to indicate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, and one or more other features. It is to be understood that the present invention does not exclude the possibility of the presence or the addition of numbers, steps, operations, components, components, or a combination thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art.

Terms such as those defined in the commonly used dictionaries should be construed as having meanings consistent with the meanings in the context of the related art, and are not construed in ideal or excessively formal meanings unless expressly defined in this application. Do not.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings, and the same or corresponding components will be denoted by the same reference numerals regardless of the reference numerals and redundant description thereof will be omitted.

First, a configuration of a communication network to which a CPU load management method of a content transmission device according to an exemplary embodiment of the present invention may be applied will be described with reference to FIG. 1.

FIG. 1 is a diagram schematically illustrating a configuration of a contents delivery network, which is a communication network to which a CPU load management method of a content delivery apparatus according to an exemplary embodiment of the present invention may be applied.

Content delivery service is to distribute the content concentrated on the server of the content provider (CP) to other servers to store the content and to deliver the content to the client (client) through the optimal path.

Communication networks in which such content delivery services are provided are referred to as content delivery networks, and such services are called content delivery services, content delivery network services, or CDN services.

As shown in FIG. 1, FIG. 1 is a communication network to which a CPU load management method of a content transmission device according to an exemplary embodiment of the present invention may be applied. The content transmission network includes a client 100, a cache server 110, and an origin. Server 120 may be included.

Among the servers that deliver the content, the server where the original content by the content provider is stored is called the origin server or the origin server 120 and the content that is concentrated on the server of the content provider (CP). A server in which is distributed and stored is called a cache server 110.

The cache server 110 may be formed as necessary to form one or more hierarchical structures such as a lower cache server and an upper cache server that coordinates the distribution of content between the lower cache server and the origin server 120. In the case of forming a hierarchical structure, the upper cache server that controls the distribution of content between the lower cache server and the origin server 120 may be referred to as a relay server or a relay cache server.

The origin server 120 and the cache server 110 are both devices capable of transmitting content to the client 100 regardless of the name, and both of them correspond to the content transmission device.

On the other hand, the cache server 110 of the content delivery device, in particular, directly receives a content transfer request of the user and transmits the content to the client 100 when the content corresponding to the transfer request is stored.

However, if the corresponding content is not stored, a redirection for connecting the client 100 with another content transmission device such as another cache server 110, a relay server that is a higher cache server, or an origin server 120, etc. In this way, the client 100 can receive the corresponding content.

If there is no corresponding content, a method of receiving the corresponding content from another content transmission device and transmitting the content directly to the client 100 is not a method of connecting the above-described client 100 to another content transmission device. This is also used.

The cache server 110 stores the corresponding content in the cache server 110 when there are many requests for transmission of the corresponding content, and then deletes the corresponding content such as deleting the corresponding content when the transmission request is low, thereby repeating the process. Can be done.

In addition, when not only the cache server 110 but also a plurality of origin servers 120 are present, content may be transmitted between the plurality of cache servers 110 and the plurality of origin servers 120 by the same method as the aforementioned redirection. You can do that.

Meanwhile, referring to the content transfer process centering on the cache server 110 connected to the client 100 in the content delivery network, the content stored in the origin server 120 may be transmitted to the client 100 through the cache server 110. Can be.

Therefore, the cache server 110 continuously provides the content to the client 100, and continuously receives and transmits the content, such as receiving the content from the origin server 100 if necessary.

In addition, due to the characteristics of the cache server 110, the input and output of data in the storage unit is continuously made, such as temporarily storing and deleting contents, and storing and deleting other contents again and again.

In addition, all operations occurring in the cache server 110 are performed by the control of the CPU, and thus, a process or cache server 110 related to the transmission of the contents such as storage, deletion, and transmission of the contents in the cache server. ), The load on the CPU increases even more.

On the other hand, the load of such a CPU can be expressed as a CPU utilization rate indicating how many processes the CPU is processing.

In the present invention, the CPU utilization is not only calculated using the number of processes and the workload, but also factors affecting the process, for example, input bandwidth and content for data input to the content transmission device. It can be calculated using various information including information about the output bandwidth of the data output from the transmission device, the size of the received data, the size of the output data, and the disk I / O which is the number of input / output of the storage unit for data input / output. have.

On the other hand, the calculation of the CPU utilization rate in the present invention can calculate both the current CPU utilization rate and the optimal CPU utilization rate.

And the current CPU utilization can be calculated and verified through a management program such as, for example, a task manager installed in the OS.

On the other hand, in the present invention, while adjusting the current CPU utilization to the optimal CPU utilization calculated, it is adjusted so as not to affect the speed of transmitting the content to the client.

In other words, the process is tuned so that the cache server achieves optimal CPU utilization without affecting the speed of delivering content to the client.

In the content delivery service, as a factor of determining a quality of a service, a transmission speed may be the most important factor. Thus, it is illustrated in FIG. 2 to determine whether the content transmission speed is affected.

However, depending on how the content delivery service is evaluated, it is possible to determine whether or not the content delivery speed is affected by further using information such as data loss rate or data transmission delay rate as well as other factors for evaluating the content delivery service. It is also possible.

On the other hand, the current CPU utilization is adjusted to the optimal CPU utilization so as not to affect the speed of transferring content to the client.

If it is determined that the speed of transferring content to the client is not affected, the process of the content transmission device is adjusted so that the CPU utilization rate of the content transmission device is at the optimal CPU usage rate.

On the other hand, the adjustment of the process is to interrupt at least one of the processes being executed by the CPU or to change the method of performing the process being executed by the CPU, for example, to increase the processing speed of data or to perform the execution order of the processes being executed by the CPU. At least one of the methods can be used.

In order to achieve the optimal CPU utilization, it is possible not only to adjust the processes currently performed in the content delivery device but also in various other methods.

For example, the input bandwidth for the data input to the content delivery device, which is information that affects the above-described process and can be used for calculating the CPU utilization rate according to the present invention, and for the data output from the content delivery device. Suspend or suspend each process or adjust the execution order of the processes using information such as output bandwidth, size of received data, size of output data, disk I / O, etc. It is also possible to adjust the process in such a way as to allow the content delivery device to have an optimal CPU utilization rate.

Meanwhile, in the above description, the present invention has been described with reference to the cache server 110. However, the present invention may be applied to a device for receiving and transmitting content, in particular, a device for transmitting content to a client.

According to one preferred embodiment of the present invention, the CPU utilization rate of the content transmission device can be maximized without affecting the content delivery service.

Hereinafter, with reference to FIG. 2, the order in which the CPU load management method of the content transmission device according to an exemplary embodiment of the present invention is applied will be described.

2 is a flowchart illustrating a procedure of applying a CPU load management method of a content transmission device according to an embodiment of the present invention.

As shown in FIG. 2, the CPU load management method of the content transmission device according to an exemplary embodiment of the present invention first calculates a utilization rate of the CPU (S200).

Calculation of the utilization of the CPU of step 200 includes the input bandwidth for the data input to the content transmission device, the output bandwidth for the data output from the content transmission device, the size of the received data, the size of the output data, and the data input / output for It may be calculated by further using information affecting a process processed in a CPU, such as disk I / O, which is an input / output number of a storage unit.

As described above, the CPU usage calculated in step 200 may calculate both the current CPU usage of the content transmission device and the optimal CPU usage according to the current state.

On the other hand, if the CPU utilization is calculated, it is determined whether or not the CPU utilization rate is adjusted to the calculated optimal CPU usage rate, so as not to affect the speed of transmitting content to the client (S202).

If you adjust the optimal CPU utilization rate, if the content transfer rate to the client is reduced, the process based on the current CPU utilization rate is maintained.

However, even when adjusting to the optimal CPU utilization rate, if the content transmission speed to the client does not decrease (S204), the processes currently performed in the content transmission device are adjusted.

On the other hand, adjusting the process to achieve optimal CPU utilization may include, for example, blocking sessions associated with the content delivery device, input bandwidth for data input to the content delivery device used for CPU utilization calculation, and output from the content delivery device. Information that affects processes such as output bandwidth for data to be received, size of data to be received, size of data to be output, and disk I / O, which is an input / output number of storage units for data input / output, may be further used.

As described above, it is also possible to further use this information to adjust each related process so that the content delivery device is at the optimum CPU utilization.

The CPU load management method of the content transmission apparatus according to the present invention described above may be implemented as a program and stored in a computer-readable recording medium (CD-ROM, RAM, ROM, floppy disk, hard disk, magneto-optical disk, etc.). have.

Hereinafter, a configuration of a content transmission device according to an embodiment of the present invention will be described with reference to FIG. 3.

3 is a diagram showing the configuration of a content delivery device according to an embodiment of the present invention.

The CPU utilization calculator 300 calculates the CPU utilization of the content transmission device.

The CPU usage rate calculated by the CPU utilization calculator 300 may calculate an optimal CPU usage rate according to a current CPU usage rate and a current CPU state of the content transmission device.

The CPU utilization calculator 300 calculates the CPU utilization by input bandwidth for data input to the content transmission device, output bandwidth for data output from the content transmission device, size of received data, size of output data, It may be calculated by further using information such as disk I / O, which is an input / output number of a storage unit for data input / output.

The service rate calculator 310 adjusts the processes being executed in the content delivery device to adjust the current CPU usage calculated by the CPU utilization calculator 300 to an optimal CPU usage rate. Determine whether it affects.

When the process adjustment unit 320 determines that the content transfer speed to the client 100 is not affected even when adjusting the processes performed by the content transmission device as a result of the determination by the service rate calculation unit 310, the CPU utilization calculator 300 Adjust the processes running in the content delivery device to the optimal CPU utilization calculated in

Adjusting the process according to the calculated optimal CPU utilization may include, for example, blocking sessions associated with the content delivery device, input bandwidth for data input to the content delivery device used to calculate CPU utilization, and output from the content delivery device. The content transmission apparatus adjusts each related process by further using information such as output bandwidth of the data to be received, the size of the data to be received, the size of the data to be output, and the disk I / O which is the number of input / output of the storage unit for data input / output. It is also possible to achieve optimal CPU utilization.

Preferred embodiments of the present invention described above are disclosed for purposes of illustration, and those skilled in the art will be able to make various modifications, changes, and additions within the spirit and scope of the present invention. Additions should be considered to be within the scope of the following claims.

1 is a diagram schematically illustrating a configuration of a content transmission network which is a communication network to which a CPU load management method of a content transmission device according to an exemplary embodiment of the present invention may be applied.

2 is a flowchart illustrating a procedure of applying a CPU load management method of a content transmission device according to an embodiment of the present invention.

3 is a diagram showing the configuration of a content delivery device according to an embodiment of the present invention.

Claims (13)

A method of managing a central processing unit (CPU) of a content delivery device in a content delivery service system including a client and a content delivery device, Calculating a CPU utilization rate of the content transmission device; Comparing the calculated CPU usage rate with a preset optimal CPU usage rate; If the calculated CPU usage rate is different from the optimal CPU usage rate, determining whether adjusting the CPU usage rate to the preset optimal CPU usage rate affects a content transfer service to the client; Determining whether to affect the content delivery service of the at least one of the data transmission rate, the data loss rate, and the data transmission delay rate of the content transmitted to the client; And Adjusting the CPU process so that the optimal CPU usage rate is determined even if the CPU usage rate is adjusted to the optimal CPU usage rate even if the determination result does not affect the content transfer service to the client. CPU management method of the content transfer device. The method of claim 1, When the calculated CPU usage rate is equal to the optimal CPU usage rate as a result of comparing the calculated CPU usage rate with the optimal CPU usage rate, The CPU management method of the content delivery device, characterized in that not to adjust the process of the CPU. The method of claim 1, If it is determined that affecting the content transfer service to the client when adjusting the CPU utilization rate to the optimal CPU utilization rate, The CPU management method of the content delivery device, characterized in that not to adjust the process of the CPU. The method of claim 1, Calculating the CPU utilization rate of the content delivery device, The optimal CPU utilization rate is further calculated using at least one of input bandwidth, output bandwidth, size of received data, size of output data, and disk I / O (input / output) information affecting the process being executed by the CPU. And a CPU management method of the content transmission device. The method of claim 1, In the step of adjusting the process of the CPU so that the optimal CPU usage rate is determined if it is determined that the CPU utilization rate is not affected even if the CPU utilization rate is adjusted to the optimal CPU usage rate. The adjusting of the process may be performed by using at least one method of interrupting at least one of the processes being executed by the CPU, changing a method of executing the process being executed by the CPU, and changing the order of execution of the processes being executed by the CPU. CPU management method of the content delivery device, characterized in that performed. The method of claim 1, In the step of adjusting the process of the CPU so that the optimal CPU usage rate is determined if it is determined that the CPU utilization rate is not affected even if the CPU utilization rate is adjusted to the optimal CPU usage rate. Adjusting the process is performed by using at least one of the input bandwidth, output bandwidth, the size of the received data, the size of the output data and the disk I / O information affecting the process being executed by the CPU CPU management method of the transfer device. In the content delivery device in a content delivery service system comprising a client and a content delivery device, A CPU utilization calculator for calculating a CPU (Central Processing Unit) utilization rate of the content transmission device and comparing the calculated CPU usage rate with a predetermined optimal CPU usage rate; When the calculated CPU usage rate is different from the optimal CPU usage rate, the service rate determining whether the CPU utilization rate is affected by the content transfer service to the client is determined by adjusting the CPU usage rate to the optimal CPU usage rate. An operation unit, wherein determining whether to affect a content transmission service to the client is performed by using at least one information of a data transmission rate, a data loss rate, and a data transmission delay rate of the content transmitted to the client; And If it is determined that the service rate calculation unit does not affect the content transfer service to the client even when the CPU utilization rate is adjusted to the optimal CPU utilization rate, the process of the CPU is performed. Content delivery device comprising a process adjustment unit for adjusting. The method of claim 7, wherein When the calculated CPU usage rate is equal to the optimal CPU usage rate as a result of comparing the CPU usage rate calculated by the CPU utilization rate calculator with the optimal CPU usage rate, And the process control unit does not adjust the process of the CPU. The method of claim 7, wherein If it is determined that the service rate calculation unit affects the content transfer service to the client when the CPU usage rate is adjusted to the optimal CPU usage rate, And the process control unit does not adjust the process of the CPU. The method of claim 7, wherein The CPU utilization calculator, The optimal CPU utilization rate is calculated by further using at least one of an input bandwidth, an output bandwidth, a size of a received data, a size of an output data, and disk I / O (input / output) information that affects a process running by the CPU. And a CPU management device of the content transmission device. The method of claim 7, wherein The process adjustment unit, Coordination of the process using at least one of interrupting at least one of the processes being executed by the CPU, changing the method of executing the process being executed by the CPU, and changing the order of execution of the processes being executed by the CPU; And a CPU management device of the content transmission device. The method of claim 7, wherein The process adjustment unit, Content adjustment characterized in that the process is further adjusted using at least one of the input bandwidth, output bandwidth, the size of the received data, the size of the output data and the disk I / O information affecting the process being executed by the CPU. CPU management unit of the transfer unit. A recording medium having recorded thereon a program for implementing a method of managing a central processing unit (CPU) of a content delivery device in a content delivery service system including a client and a content delivery device, Calculating a CPU utilization rate of the content transmission device; Comparing the calculated CPU usage rate with a preset optimal CPU usage rate; If the calculated CPU usage rate is different from the optimal CPU usage rate, determining whether adjusting the CPU usage rate to the optimal CPU usage rate affects a content transfer service to the client; contents to the client Determining whether to affect a delivery service is performed using at least one of a data transmission rate, a data loss rate, and a data transmission delay rate of the content transmitted to the client; And Adjusting a process of the CPU so that the predetermined optimal CPU usage rate is determined when it is determined that the CPU utilization rate is not affected even when the CPU utilization rate is adjusted to the optimal CPU usage rate. Recording medium recording a program for implementing the CPU management method of the content transmission device comprising a.

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