KR102077283B1 - Remote back-up device - Google Patents

Abstract

The present invention relates to a remote backup device using an RDMA method, comprising: a memory unit for storing data; A network adapter accessing the memory unit in an RDMA manner at the request of a control device to transmit the data to a network; A memory control unit controlling the data transmitted from the memory unit to the network adapter; The memory unit and the memory controller when main power is cut off; And a power supply unit supplying auxiliary power to at least one of the network adapters. It may include.

Description

Remote backup device {REMOTE BACK-UP DEVICE}

The present invention relates to a remote backup device, and more particularly, to a remote backup device capable of transferring backup data to a network using RDMA.

Currently, the technological level of the Internet is rapidly growing, and in particular, the demand for remote control technology for remotely accessing and controlling a target device using wireless communication is increasing. This remote control technology has an advantage in that the user can immediately control the target device without having to go to the place where the target device is located.

Using remote control technology, data stored on the device targeted for remote control can be backed up to the person who manages the remote control. Remote backup may be needed when the security of data stored on the target device is important, when an administrator must manage the data on the target device regardless of the intention of the target device user.

However, in general, the control of the target device by using the remote control is often the user of the device can know that their device is controlled by a remote administrator, the user of the target device if the user of the target device does not want There is a problem that can be unilaterally terminated by the remote control state.

In addition, a case in which data stored in the device is intentionally or unintentionally deleted by the device user or may be impossible to recover data stored in the device due to loss or destruction of the device.

In this case, the target device of the remote control must be able to back up internal data regardless of the user's intention of the device or the power supply state of the device.

Another object of the present invention is to provide a remote backup device capable of backing up data stored in a memory onto a network even when main power is cut off.

In addition, a remote backup device according to an embodiment of the present invention is to provide a remote backup device with increased security by backing up the stored data in a state where the user can not directly know the data backup state.

In addition, a remote backup device according to an embodiment of the present invention is to provide a remote backup device capable of minimizing the amount of transmission data transmitted on the network and the power required by the target device for remote control.

In order to solve the above problems, a remote backup device according to an embodiment of the present invention comprises a memory unit for storing data; A network adapter accessing the memory unit in an RDMA manner at the request of a control device to transmit the data to a network; A memory control unit controlling the data transmitted from the memory unit to the network adapter; The memory unit and the memory controller when main power is cut off; And a power supply unit supplying auxiliary power to at least one of the network adapters. It may include.

Another remote backup device according to an embodiment of the present invention has an effect of easily maintaining or restoring data by backing up data stored in a memory onto a network even when main power is cut off.

 In addition, the remote backup device according to an embodiment of the present invention has an effect of increasing security by backing up the stored data in a state where the user does not know the data backup state directly.

In addition, the remote backup device according to an embodiment of the present invention has the effect of minimizing the amount of transmission data transmitted on the network and the power required by the target device for remote control. However, the effect that the semiconductor package and the method of manufacturing the same according to an embodiment of the present invention can achieve is not limited to those mentioned above, and other effects not mentioned are described in the following technical field. It will be clearly understood by those skilled in the art.

1 is a view for explaining a remote backup system including a remote backup device according to an embodiment of the present invention.
2 is a block diagram illustrating a remote backup device according to an embodiment of the present invention.

As the present 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 that the present invention includes all modifications, equivalents, and substitutes included in the spirit and scope of the present invention.

In describing the present invention, if it is determined that the detailed description of the related known technology may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted. In addition, the numbers (eg, first, second, etc.) used in the description process of the present specification are merely identification symbols for distinguishing one component from another component.

In addition, in the present specification, when one component is referred to as "connected" or "connected" with another component, the one component may be directly connected or directly connected to the other component, but in particular It is to be understood that unless otherwise indicated, there may be connected or connected via another component in the middle.

Hereinafter, exemplary embodiments of the inventive concept will be described with reference to the accompanying drawings.

1 is a view for explaining a remote backup system including a remote backup device according to an embodiment of the present invention.

Referring to FIG. 1, a remote backup system according to an embodiment of the present invention may include a remote backup device 10, a network 20, and a control device 30.

The remote backup device 10 may be connected with the network 20. The remote backup device 10 may transmit data stored in the remote backup device 10 to the control device 30 via the network 20 under the control of the control device 30.

Here, the back-up may refer to a method performed to avoid data loss due to the interruption of the main power in a part of the storage system or the data storage system for data retention.

The network 20 can be any network that allows data to be transferred by any means between the remote backup device 10 and the control device 30. The data may be in the form of a file including images, videos, music, and documents, but the scope of the present invention is not limited thereto. The network 20 may be private or public, wired or wireless, or may be a full or partial network.

In more detail, the network 20 may include both a wired communication network and a wireless communication network. When the network 20 is a wired communication network, the network 20 may be a network implemented by any one or more of power line communication device, telephone line communication device, Ethernet, IEEE1294, integrated wired home network, and RS-485. . In addition, when the network 20 is a wireless communication network, the network 20 may be implemented as a wireless LAN (WLAN), Bluetooth, Wireless Fidelity (WiFi), Long Term Evolution (LTE), or the like.

In the present invention, the network 20 may be configured as a network supporting RDMA in response to the remote backup device 10 that performs data backup in a RDMA (Remote Direct Memory Access) method. Examples of networks that support RDMA include Infiniband and RDMA over Converged Ethernet (RoCE).

Here, RDMA may refer to a high speed network system that provides short access speed and wide bandwidth. In particular, RDMA can be understood as a network system that bypasses the network stack of the system kernel and allows a network interface device (NIC) or a network adapter to directly access application memory to perform communication.

The control device 30 may refer to a device requesting a backup by transmitting a control command to the remote backup device 10 remotely. More specifically, the control device 30 may refer to various devices on which a function for controlling the remote backup device 10 is performed, such as a personal computer or a server computer. The control device 30 can be communicatively connected to the remote backup device 10 via the network 20.

Hereinafter, a user who controls the remote backup device 10 through the control device 30 as a user of the control device 30 will be referred to as an administrator, and the user of the remote backup device 10 will be described as a backup device user. Let's do it.

2 is a block diagram illustrating a remote backup device 10 according to an embodiment of the present invention.

2, the remote backup device 10 may include a memory unit 100, a power supply unit 200, a memory control unit 300, and a network adapter 400. The memory unit 100 may include a volatile memory unit 110, a nonvolatile memory unit 120, and a data controller 130.

The memory unit 100 may store data. Data stored in the memory unit 100 may be accessed by the network adapter 400 in an RDMA manner and transmitted to the control device 30 or the storage device 40 through the network 20.

The storage device 40 is distinguished from the control device 30 and may be an apparatus for storing data transmitted from the remote backup device 10. The storage device 40 may include one of a hard disk drive (HDD) and a solid state drive (SSD).

The control device 30 or storage device 40 may have an environment for receiving data transmitted from the remote backup device 10 accessed in an RDMA manner.

The memory unit 100 may include a volatile memory unit 110, a nonvolatile memory unit 120, and a data controller 130. The memory unit 100 may include a non-volatile dual in-line memory module (NVDIMM) for backing up data stored in the volatile memory unit 110 to the nonvolatile memory unit 120 in preparation for a situation in which main power is cut off. Can be.

The volatile memory unit 110 may temporarily store data required for calculation of the central processing unit, and may be a storage device in which data stored therein is volatilized when main power is cut off. A dynamic random access memory (DRAM) may be exemplified in the volatile memory unit 110.

The nonvolatile memory unit 120 may be connected to the volatile memory unit 110 so that data can be transferred to each other. The nonvolatile memory unit 120 may be a storage device in which data therein is not volatilized even when main power is cut off. As the nonvolatile memory, a NAND type flash memory may be exemplified.

When the main power is cut off, the data controller 130 may generate data stored in the volatile memory unit 110 as backup data of the nonvolatile memory unit 120 using the auxiliary power. To this end, the data controller 130 may provide a protocol for copying data of the volatile memory unit 110 and generating the backup data to the nonvolatile memory unit 120 when the main power is cut off.

Here, the situation in which the main power is cut off may mean a condition in which a part of the data stored in the memory unit 110 reaches a risk that loss or restoration of the data may be lost. The main power source is provided from a battery carried by the remote backup device 10 for the entire system of the remote backup device 10 including the memory unit 110 to operate or connected via a power line to the remote backup device 10. It may mean power provided from the outside.

The power supply unit 200 may supply auxiliary power to one or more of the memory unit 100, the memory controller 300, and the network adapter 400 when the main power is cut off. The power supply unit 200 may be implemented in a number of ways. For example, the power supply unit 200 may be an energy source implemented by a battery or a capacitor for providing a power source separate from the main power source. In addition, the power supply unit 200 may be recharged using the main power while the main power is provided.

When the main power is cut off, the data stored in the volatile memory unit 110 is generated as the backup data of the nonvolatile memory unit 120, and the process of transmitting the backup data to the network by the network adapter is provided by the power supply unit 200. It can be done using However, when the amount of backup data is large or the communication speed is low, it may take a long time for the network adapter 400 to transmit the backup data to the network 20, which causes the exhaustion of a limited supply of auxiliary power. can do.

If the secondary power is cut off while the data is being transmitted while the main power is cut off, valid data transmission may not be performed. Therefore, when the main power is cut off, the data is transmitted from the memory unit 100 to the network adapter 400. There is a need to control the amount of data.

The memory controller 300 may control transmission of backup data stored in the nonvolatile memory unit 120 to the network adapter 400.

Among the backup data stored in the nonvolatile memory unit 120 of the remote backup device 10, the data most recently used by the user may be the most important data. The most recently used data by the user may be stored as backup data in the nonvolatile memory unit 120 in the last order.

When the backup data of the nonvolatile memory unit 120 is transmitted to the network adapter 400, the memory controller 300 transmits the backup data such that the backup data is transmitted to the network adapter 400 in the order in which the backup data is generated. You can set the order. In more detail, the memory controller 300 backs up the data in order from the most recently generated backup data to the most recently generated backup data among the backup data generated by the main power to the memory unit 100 and the nonvolatile memory unit. Data may be set to be transmitted to the network adapter 400.

The memory controller 300 may select the last session of the input / output log (I / O log) of the memory unit 100 as the first backup data. Therefore, when the memory controller 300 determines the backup order of the backup data transmitted from the memory unit 100 to the network adapter 400, the memory controller 300 may determine the backup order in the reverse order of the time when the backup data is generated. have. That is, the memory controller 300 may determine the backup order in a last in first out (LIFO) method.

The memory controller 300 checks the power remaining amount and the amount of backup data of the power supply unit 200, and the amount of backup data transmitted to the network adapter 400 in correspondence with the confirmed power remaining amount and the amount of the checked backup data. Can be controlled.

In more detail, the memory controller 300 may check the remaining power amount of the power supply unit 200 by checking the remaining charge amount or the voltage state of the power supply unit 200. Also, the memory controller 300 may check the total size of the backup data stored in the nonvolatile memory unit 120. The memory controller 300 may transmit the entire backup data to the network adapter 400 or only some of the backup data. It may be determined whether to transmit to the network adapter 400. When only a part of the backup data is transmitted to the network adapter 400, the amount of backup data transmitted may be determined in consideration of the remaining power of the power supply unit 200 and the amount of backup data generated in the inactive memory unit 120.

In order to control the amount of backup data transmitted to the network adapter 400, the memory controller 300 checks the remaining power level from the power supply unit 200 and transmits the data from the memory unit 100 through the network adapter 400. The amount of backup data may be checked and data about the communication speed may be checked from the network adapter 400.

The memory controller 300 may obtain the backup data transmission time required for the network adapter 400 to transmit the backup data by dividing the identified target backup data by the communication speed (data transmission rate per second, Byte per Second). . In addition, the memory controller 300 may obtain an auxiliary power supply time for the power supply unit 200 to provide auxiliary power by dividing the remaining power of the power supply unit 200 by the amount of power required per second.

To this end, the network adapter 400 may check the communication speed with the control device 30 and inform the memory controller 300 of the confirmed communication speed. In this case, the network adapter 400 may check the communication speed by measuring a response time of a separate communication speed measuring apparatus or a network.

The memory controller 300 compares the backup data transmission time with the auxiliary power time, and when the transmission time of the backup data is longer than the auxiliary power time, the data transmitted from the nonvolatile memory unit 120 to the network adapter 400. You can control the amount of.

The memory controller 300 may control the amount of backup data transmitted to the network adapter 400 in correspondence with the communication speed confirmed by the network adapter 400, the remaining power remaining amount, and the confirmed backup data amount. More specifically, the memory controller 300 may consider the backup data transmission time and the auxiliary power time, when the current network adapter 400 is not enough to transmit all the backup data on the network 20, the power supply unit 200 Only a part of the backup data can be controlled to be transmitted on the network 20 within the limit that the auxiliary power of the power supply can be sufficiently supplied. The transmission of the backup data may be controlled according to at least one of the modes.

The emergency backup mode may be a mode that allows the memory controller 300 to transmit as much backup data as possible in a short time by raising the output of the network adapter 400 to a limit value.

When the emergency backup mode is performed, the power supply unit 200 may provide an auxiliary power corresponding to the high output of the network adapter 400. The emergency backup mode may be performed until the power remaining amount of the power supply unit 200 is reduced to a minimum. The emergency backup mode may be performed at the request of the control device 30 in an emergency situation in which the remote backup device 10 is lost or the data therein is stolen.

The priority backup mode may be a mode in which the memory controller 300 selectively transmits the backup data in consideration of the importance or priority of the data stored in the memory unit 100. First, the backup mode may increase the probability that important backup data is transmitted among the entire backup data to be transmitted.

More specifically, in the backup mode, the memory controller 300 checks the communication speed of the network adapter 400 at a predetermined time interval, and when the communication speed is higher than or equal to a predetermined level, the method of maximizing the output of the network adapter 400. It can be performed as. Therefore, the first backup mode can reliably transmit backup data of high importance by flexibly changing the amount of backup data transmitted according to the communication speed environment.

The general backup mode may be a mode in which the memory controller 300 controls the memory unit 100 and the network adapter 400 to transmit backup data through the network adapter 400 at a constant speed.

As described above, the modes may be changed in real time at the request of the control device 30 or in accordance with a preset algorithm.

The network adapter 400 may transmit data to the network 20 by accessing the memory unit 100 in an RDMA manner at the request of the control device 30. More specifically, the network adapter 400 may transmit the backup data of the nonvolatile memory unit 120 to the network 20 by accessing the nonvolatile memory unit 120 in an RDMA manner at the request of the control device 30. have.

Since the network adapter 400 accesses the memory unit 100 in an RDMA manner, the network adapter 400 does not involve main processing resources such as an operating system kernel in the process of transferring data from the memory unit 100 to the network 20. Through this, data stored in the memory unit 100 may be directly moved to a memory buffer of the control device 30 or the storage device 40 so that data backup may be performed. In addition, the access through the RDMA is not directly exposed to the user of the remote backup device 10, so that the user does not know that the memory of the control device 30 has been accessed.

When the main power is cut off, the network adapter 400 may use an auxiliary power provided from the power supply unit 200. Therefore, when the main power is cut off to reduce the auxiliary power consumed by the network adapter 400, the memory controller 300 may reduce the auxiliary power usage to the minimum by reducing the output of the network adapter 400 for data transmission. have. As described above, the memory controller 300 may increase or decrease the output of the network adapter 400 by urgently transmitting the backup data or considering the communication speed.

By accessing the memory unit 100 via RDMA, the network adapter 400 may have a lower latency than a normal network backup involving main processing resources, and may transmit more data at the same cost. There is.

As mentioned above, although the embodiments of the present invention have been described with reference to the accompanying drawings, those skilled in the art to which the present invention belongs may be embodied in other specific forms without changing the technical spirit or essential features of the present invention. You will understand that there is. Therefore, it should be understood that the embodiments described above are exemplary in all respects and not restrictive.

100: memory 200: power supply
300: memory control unit 400: network adapter

Claims (10)

A memory unit including a nonvolatile memory unit for storing backup data, a volatile memory unit, and a data controller;
A network adapter accessing the memory unit in an RDMA manner at the request of a control device to transmit the backup data to a network;
A memory control unit controlling the backup data transmitted from the memory unit to the network adapter;
And a power supply unit supplying auxiliary power to at least one of the memory unit, the memory control unit, and the network adapter when main power is cut off.
The network adapter requests transmission of the backup data to the memory unit at the request of the control device,
And the memory controller controls to transfer the backup data from the nonvolatile memory unit to the network adapter. The method of claim 1, wherein the data control unit
And when the main power is cut off, generating data stored in the volatile memory unit as the backup data using the auxiliary power. The method of claim 2, wherein the data control unit
And a protocol for copying data of the volatile memory unit to generate backup data in the nonvolatile memory unit when the main power is cut off. delete The memory controller of claim 1, wherein the memory controller comprises:
And setting the order of transmitting the backup data to the network adapter in response to the order in which the backup data is generated in the nonvolatile memory unit. According to claim 1,
And wherein said volatile memory is DRAM and said non-volatile memory is flash memory. The memory controller of claim 1, wherein the memory controller comprises:
Confirming the remaining power amount of the power supply unit and the amount of the backup data, and controlling the amount of the backup data transmitted to the network adapter in response to the confirmed remaining power amount and the confirmed backup data amount; . The method of claim 7, wherein
The network adapter checks the communication speed and informs the memory controller,
And the memory controller controls the amount of the backup data transmitted to the network adapter in response to the confirmed communication speed, the confirmed power remaining amount, and the confirmed backup data amount. The network adapter of claim 1, wherein the network adapter is
And remotely backup the data to the control device using LTE. The network adapter of claim 1, wherein the network adapter is
And transmit the data through the network to the control device or a networked storage device.

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