KR20140047829A - Cloud stroage system having electric power control switching module - Google Patents

Abstract

The present invention relates to a cloud storage system including a power control switching module capable of minimizing unnecessary power consumption in the cloud storage system by blocking power to a disk or server to which data access does not occur for a long period of time and applying power only when data input/output is requested. According to the present invention, the cloud storage system including the power control switching module includes a metadata server, a data server, a client block, and an administrator block. An integrated power management method for the cloud storage system includes: a step where the power mode of a DS is set through an administrator interface; a step where an integrated power management module delivers the setting to a node power management software module of each DS according to the power management policy; a step where the node power management software module of each DS sets the power mode of a disk based on the setting data; a step where, if data input/output does not occur for a certain period of time, a disk power management software module switches the mode of the DS node to a predefined power mode; and a step where the power mode setting data and the current power mode status of the DS are stored in the metadata database. [Reference numerals] (1) Deliver setting data of the power mode of a DS node; (2) Set the power mode of the DS node; (3) Set the power mode of a disk; (4) Data connection; (5) Power connection unit; (6) Controller chip; (7) Buffer; (8) IDE configuration device; (AA) Metadata BD; (BB) DS management module; (CC) Metadata management module; (DD) Integrated power management module; (EE,II,MM) Communication module; (FF) User interface; (GG) Name space processing module; (HH) File in/out module; (JJ) Administrator; (KK) Administrator interface; (LL) Power management interface; (NN) In/out service module; (OO) Data storage module; (PP) Data management module; (QQ) Disk power management software module; (RR) Node power management software module; (SS) WIL support NIC

Description

CLOUD STROVE SYSTEM HAVING ELECTRIC POWER CONTROL SWITCHING MODULE WITH POWER CONTROL SWITCHING MODULE

The present invention relates to a cloud storage system having a power control switching module, and more particularly, to a cloud storage system having a power control switching module, and more particularly, to a cloud storage system in which a power of a disk and a server, To a cloud storage system having a power control switching module that minimizes unnecessary power dissipation in a cloud storage system.

Conventional power saving technologies are based on 1) processor power saving technology from the standpoint of single server platform, 2) power conversion efficiency enhancement technology, 3) rack power efficiency enhancement technology, and 4) Research / development.

1) Low power server technology

Low-power server technology is under active research in the field of power-consuming processors and inefficient power converters. Processor power savings technologies can be divided into technologies that reduce power at the operating system level and technologies that reduce processor power at the BIOS level.

A typical technology to reduce power at the operating system level on a microprocessor is Intel's Demand Based Switching (DBS) or SpeedStep, AMD's PowerNow technology. DBS technology is a technology that reduces power by varying the operating voltage and frequency of the process depending on the load. Generally, the load on the processor varies with time in the computer server. When DBS technology is not used, the CPU consumes a certain amount of power regardless of the usage amount. However, using DBS technology can reduce power consumption when CPU usage is low. DBS and PowerNow technologies require power management in the operating system to save power.

HP's Power Regular technology is a technology that saves processor power in the BIOS stage. BIOS-based power saving technology has the advantage that any platform can operate without the help of a Yoon system or processor, but it is generally less efficient than operating system-level power management technology because it is difficult to efficiently manage the processor state under load.

2) Power conversion efficiency enhancement technology

The biggest power loss after the CPU in the server is the power loss of the power supply unit (PSU) responsible for AC / DC switching. Generally, the efficiency of the PSU is about 70 ~ 75%, and when the load is less than 40%, the efficiency is lowered. Google operates over hundreds of thousands of computers and pays over $ 2 billion a month for electricity. The voltage generated by the PSU is unified to + 12V, while the voltage regulator module on the main board Main boards and PSUs are manufactured to reduce power by 20-30%. Recently, the data center itself is proposing to supply + 12V DC voltage directly to servers.

3) Rack power efficiency enhancement technology

Rack Power reduction technology is a technology that constructs a rack system by effectively estimating power consumption according to the configuration or service of a rack-mounted system. Generally, when configuring the rack, the server is configured considering the maximum power consumption (Nameplate power). However, in general, racks are rarely configured to consume the maximum power consumption. In recent years, a variety of rack configuration policies have been proposed, such as Nameplate approach and Pconfig usage, to save power.

4) Data center power operation technology

In order to reduce power consumption per data center, various measures / researches and suggestions are suggested to improve the power efficiency of the data center along with the power saving technology of the server itself, and a joint research to reduce the power consumption of the data center such as the green grid Projects are also under way. Currently, power efficiency problems in the data center are being addressed as environmental problems, not just the problems of IT service infrastructure. Various technologies are being developed and applied in various fields. To this end, virtualization technologies that increase server utilization, high-efficiency data center power delivery technologies, and high-efficiency data center cooling technologies are expected to become key technologies for future data center power savings.

However, the power saving technique described above can reduce the power consumption of the system irrespective of the frequency of data use, and power is wasted in order to maintain a disk without long-term input / output. Accordingly, there is a need for a system that performs power saving based on data usage in a system environment in which multiple storage servers such as cloud storage or distributed network storage systems are configured with a single virtualized image.

The present invention has been made to solve the above problems, an object of the present invention is to switch to a state that completely shuts off the power supply to the node of the storage nodes of the distributed network storage system data input and output does not occur for a long time the entire system To provide a distributed network storage system with minimal power usage.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a distributed network storage system capable of activating a node and performing normal data service by reapplying power at a time when input / output of data stored in a disk node whose power is interrupted is required.

A cloud storage system having a power control switching module according to the present invention,

A metadata server for storing and managing file metadata;

A data server for processing requests related to data; And

And a client block using the storage service.

According to the present invention, the integrated power management method of a cloud storage system including a metadata server, a data server, a client block, and a manager block and including a power control switching module,

Setting a power mode of the DS through the manager interface;

The integrated power management module transmitting the setting to the node power management SW module of each DS according to the power management policy;

The node power management SW module of each DS establishing a power mode for the disk based on the setting information;

Switching the DS node to the corresponding mode according to the power mode set by the disk power management SW module when no input / output occurs for a predetermined time;

The power mode setting information of the DS and the power mode state of the current DS in the meta data DB.

A data input / output management method of a cloud storage system including a metadata server, a data server, a client block, and a manager block and having a power control switching module,

Transferring an input / output request to the data in the client block to the MDS;

Determining, by the metadata management module, a DS to perform input / output of the data;

Determining whether there is a currently operating DS among the DS nodes having the data;

If there is a currently operating DS, the client is configured to perform data input / output by communicating with the DS based on data location information including information of the currently operating DS.

The cloud storage system having the power control module according to the present invention performs data input / output based on the disk power mode and state of the DS, thereby minimizing the use of server power consumed in driving the disk.

The cloud storage system having the power control module according to the present invention performs input / output with reference to the current disk power mode and status information in a state in which the disk power mode of the system is preset in order to minimize power consumption, It is possible to provide a faster input / output service than when input / output is performed.

1 is a block diagram schematically illustrating a general configuration of a distributed network storage system.
2 is a block diagram schematically illustrating a configuration of a cloud storage system having a power control switching module according to the present invention.
3 is a block diagram illustrating a detailed module configuration of a cloud storage system having a power control switching module according to the present invention.

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

1 is a block diagram schematically illustrating a general configuration of a distributed network storage system.

In general, a distributed network storage system includes a plurality of Meta Data Servers (MDS) 100, a plurality of DS Servers (Data Storage Servers 200), and a plurality of CLIENT blocks 300 connected by Ethernet to form one large file system. To provide services.

MDS provides node redundancy through HA (High Ability) cluster function to increase service availability. Integrated management node can be configured separately for efficient and integrated management of all system resources and integrated management of resources can be performed from anywhere through Web and CLI (Command Line Interface).

The role of each block is as follows.

MDS ( Meta Data Server , 100)

MDS is a main management system that configures and manages distributed network storage systems. It stores and manages system metadata. When there is a request from the CLIENT block or DS server, it configures the DS server as a virtual single system image to provide a single system image in the CLIENT block. MDS provides functions such as CLIENT block, DS server management and status information collection, volume management, directory storage and management, and metadata operation processing.

MDS is a server that handles file metadata operations of all client blocks. MDS is a user-level daemon process that stores and manages file metadata. It receives and processes requests from the CLIENT block, the DS server. MDS It periodically monitors status information such as network topology and utilization rate, hardware information and storage, CPU information and utilization rate, and provides functions such as file metadata management and operation processing, replication and recovery.

The MDS 100 supporting the single file system includes a communication module 110, a metadata processing module 120, a DS management module 130, an MDS management module 140, and a metadata DB (database) 160. do.

Among them, the communication module 110 receives and confirms a request of a user and a DS connected to the client block 300 through a network, and then makes a processing request to the corresponding module according to the request type. When the processing corresponding to the processing request is completed, the result is sent to the client block through the network.

The metadata processing module 120 performs a service for processing metadata such as reading a file set attribute requested by a user connected to the client block 300, searching for an entry, reading an entry attribute, and creating / deleting an entry.

The metadata server 100 supporting a single file system image includes a DS management module 130 that manages all DSs for data storage space, and the DS management module 130 adds and deletes data servers and fails the data server. Detect and manage data server storage space.

The MDS management module 140 manages and terminates the metadata server 100, performs metadata error checking and recovery, and outputs file system statistics information to manage the metadata server.

DS ( Data Server , 200)

DS is a server that handles requests related to file data. As a DS user-level daemon process, file data is stored in chunks with version information, and chunks are created, changed, deleted, replicated from the MDS 100, and access and storage of the data is performed. The request of the client block 300 is received, and the appropriate processing is performed. The DS block periodically notifies the MGT of its status information such as network topology, hardware information and storage, CPU, and network utilization. It also performs functions such as client / MDS input / output services, data storage and management, status information collection and reporting.

The DS 200 includes an input / output service module 210, a data storage module 220, and a data management module 230.

The input / output service module 210 directly processes the file input / output request received from the client 300 without the intervention of the metadata server 1010, thereby reducing the load of the metadata server 100 and reducing the response speed of the client 100. And improves performance. In addition, it receives and processes a request such as file creation / deletion / Truncate from the metadata server 100 or reports the status information of the data server 200 to the metadata server 100, wherein the chunk validity such as a version mismatch check is performed. The test is also performed.

The data storage module 220 stores the version information together with the data of the file to provide a function of determining whether the chunk has an old invalid version and whether the recording of the chunk is normally completed. By calculating the version information or the CRC value of the chunk at the request of the client 300 or the metadata server 100, it helps to check the validity of the chunk.

The data management module 230 performs a chunk duplication operation to another data server 200 according to an instruction from the metadata server 100, and reports the error code to the metadata server 100 as a result.

The client 300,

A client is a block that uses storage services. File system APIs and file system utilities provide file services for the system. That is, the client 300 performs a function of providing a file system API, setting and releasing a file system mount, processing a namespace, and inputting / outputting a file.

The client 300 includes a namespace processing module 310, a file input / output module 320, a communication module 330, and a user interface.

Since the namespace processing module 310 stores and manages all file metadata of the file system in the UCS FS system in the metadata server 100, the file or directory creation, deletion, retrieval, renaming, etc. It performs the function of processing namespace operation through metadata server block. It has file system mount / unmount function, namespace processing function, and platform independent operating environment function.

The file input / output module 320 performs a function of writing file data to the data server block 100 or reading file data from the data server block 100. In detail, the file input / output module and the online data server block extension are performed. And a removal support function, a fault tolerance function for the failure of the data server block 100, and a file sharing semantic function.

The communication module 330 performs socket communication processing between the metadata server 100 block and the data server 200 block. In particular, to efficiently communicate with the metadata server 100 block, a predetermined number of socket connection pools are created, and communication processing with the metadata server 100 block is performed using the predetermined number of socket connection pools. The communication with the data server 200 is a form of continuously transmitting or receiving data after one read or write request in order to optimize sequential access to the file data.

One or more storage nodes (data store, 240) configured in the DS 200 support the Intelligent Platform Management Interface (IPMI) protocol as in the configuration of a general purpose server, and focus on various hardware resources around the baseboard management controller (BMC). Configured to perform monitoring and control. The power management software communicates with the BMC and the hard disk controller to collect and manage power related information, and performs power control of the system through communication with the central main management server.

2 is a block diagram schematically illustrating a configuration of a cloud storage system having a power control switching module according to the present invention.

Cloud storage system having a power control switching module according to the present invention can operate the system in the state of shutting off the power of the storage server node without input / output for a long time, when the input and output of the data is requested, the data can be used to use the data. And a power control switching module.

The power control switching module 170, which is a main component of the present invention, is a module that performs power control by a software method using a Wake on LAN (WOL) function of a NIC module of a server. Here, a WOL is a technology for turning on a system by sending a magic packet (a packet specifically defined for using the WOL function) to a server or a PC connected to the network. In order to use the WOL, a motherboard and an adapter for WOL You have to change the settings of CMOS and LAN card.

The integrated power management module can be separately configured to efficiently manage and manage all system resources, and integrated management of resources can be performed from anywhere through the web and the command line interface (CLI).

The DS (data storage) node supports the Intelligent Platform Management Interface (IPMI) protocol as in the configuration of a general-purpose server, and is configured to monitor and control various hardware resources around the baseboard management controller (BMC).

BMC is a microcontroller mounted on the metadata server's motherboard to monitor and manage the hardware resources of the server based on the Intelligent Platform Management Interface (IPMI) protocol. It provides an interface and collects information such as temperature, fan speed, power status and CPU status from sensors supporting various types of IPMI protocols installed in cloud storage systems. Also, the configuration of the hardware resources can be changed and managed through communication with another hardware controller supporting IPMI. The BMC can send alarms from the sensor to the system administrator through the network, and can perform system management such as setting change, rebooting, etc. through communication with the remote system administrator.

The power management SW module 250 of the DS server communicates with the BMC and the disk controller to collect and manage power related information, and performs power control of the system through communication with the integrated power management module 150 of the MDS.

The cloud storage system having the power control switching module according to the present invention can apply the disk power mode to the disk without the long-term input and output and relocate the data can reduce the power for data management and maintenance.

3 is a block diagram illustrating a detailed module configuration of a cloud storage system having a power control switching module according to the present invention.

The cloud storage system with the power control switching module according to the present invention allocates the read and write of data to the DS based on the power mode and state of each DS. Based on the power mode of the DS, the integrated power usage is minimized by first reading and writing data to the DS that is currently operating or consumes less power.

A cloud storage system with a power control switching module according to the present invention is a metadata server (MDS) 100. Data server (DS) 200 and client block 300.

The metadata server 100 is a communication module 110 for receiving a request of a client block and a DS and transmitting a processing result, a metadata management module 120 for processing a metadata service, and a data server managing a plurality of data servers. The management module 130, the metadata server management module 140 that starts and shuts down the MDS, checks and recovers MDS errors, and outputs file system statistical information, periodically sets the power mode information and the actual power mode state to the metadata database. An integrated power management module 150 and metadata database 160 to store.

The data server 200 generates an I / O service module 210 for creating, deleting, and truncating a file according to a file I / O request of an MDS, a data storage module 220 for storing data and version information of a file, and a request for an MDS. Data management module 230 performing a chunked operation to another DS, a plurality of disks 240 power mode can be set for each, set the power mode for the disk based on the DS power mode setting information and integrated power management module Node power management SW module 260 for communicating the power mode state of the DS to the disk power management SW module 250 for managing and monitoring the disk power mode and providing the disk power mode state to the MDS.

The data server 200 further includes device drivers and adapters, BOIS and adapters, and WOL support NICs.

The client block 300 includes a namespace processing module 310, a file input / output module 320, a communication module 330, and a user interface 340.

The cloud storage system with the power control switching module according to the present invention further includes a manager block 400, which includes a disk power management module 410, a communication module 420, and a user interface 430. ).

The DS of the cloud storage system according to the present invention can set the power mode to minimize power use, and this function is called an APM (Advanced Power Management) function. Changing and monitoring the power mode settings of DS can be done through the administrator interface.

According to an aspect of the present invention, there is provided a cloud storage system including: setting a power mode of a DS through an administrator interface; The integrated power management module transmitting the setting to the node power management SW module of each DS according to the power management policy; The node power management SW module of each DS establishing a power mode for the disk based on the setting information; Switching the DS node to the corresponding mode according to the power mode set by the disk power management SW module when no input / output occurs for a predetermined time; Integrated power management is performed by storing the power mode setting information of the DS and the current power mode state of the DS in the metadata DB.

The power mode of the DS set at this time is one of the following three.

Power) Full Power Mode: No power control

Ii) Disk Power Saving Mode: Switches the power mode of the disk without I / O to Stanby

Iii) Server Power Saving Mode: Switches the power mode of the server without input / output to standby and shutdown

When the disk power management SW module switches the DS node to disk power saving mode according to the set power mode, the DS is switched to the power-off state of all circuits except the WOL-capable NIC module that needs to receive the magic packet.

The following describes data input / output management for a cloud storage system according to the present invention.

When trying to input / output data to the cloud storage system according to the present invention in which the power mode of the DS node is switched according to the setting of the administrator interface, the data exists in the currently running DS and in the shut down DS. In this case, I / O management is performed.

First, the client block 300 transmits an input / output request for data to the MDS 300.

Next, the metadata management module 120 of the MDS 100 may select the DS 200 to perform data input / output based on the power mode setting information of the DS stored in the metadata DB 160 and the power mode state of the current DS. In this case, it is determined whether there is a currently operating DS among DS nodes having corresponding data.

At this time, the criteria for determining the DS 200 to perform data input / output based on the power mode setting information of the DS and the current power mode state of the DS is as follows.

1st priority: Determined after setting priority based on current DS power mode status.

(Full Power Mode> Disk Power Saving Mode> Server Power Saving Mode)

2nd priority: Determined after setting the priority based on the set DS power mode.

(Full Power> Disk Power Saving> Server Power Saving)

3rd priority: Determined after setting priority on the basis of current DS power mode + disk power mode

Next, if there is a currently operating DS among the DS nodes having the corresponding data, select one of the operating DSs and transfer data location information including the corresponding DS information to the file input / output module 320 of the client 300. Then, the client 300 communicates with the DS based on the data location information including the corresponding DS information to perform data input / output.

If there is no DS currently operating among the DS nodes having the corresponding data, first, a Wait command is transmitted to the file input / output module 320 of the client 300, and one of the DSs is selected to perform a magic packet (Wake on). Lan signal) to the DS node. When the booting of the DS node receiving the magic packet signal is completed, the node power management SW module 260 of the DS transmits the power mode state of the booted DS to the integrated power management module 150 of the MDS 100, and the integrated power. The management module 150 transmits the updated status information of the DS node to the metadata management module 120. When the metadata management module 120 transmits the data location information including the updated status information of the DS to the file input / output module 320 of the client 300, the client 300 includes the updated status information of the DS. Perform data input / output by communicating with DS based on data location information.

The cloud storage system having the power control switching module according to the present invention performs data input / output without waking the DS which is in the disk power saving mode as much as possible based on the set power mode and the current DS power mode state of the DS. Minimize server power usage

The foregoing description is merely illustrative of the technical idea of the present invention and various changes and modifications may be made without departing from the essential characteristics of the present invention by those skilled in the art. Therefore, the embodiments disclosed in the present invention are not intended to limit the scope of the present invention but to limit the scope of the present invention. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

Claims (8)

A metadata server for storing and managing file metadata;
A data server for processing requests related to data; And
Containing client blocks that use storage services
Cloud storage system with power control switching module.
The method according to claim 1,
The data server
An input / output service module that creates, deletes, and truncates a file according to a file input / output request of an MDS;
A data storage module for storing data and version information of the file;
A data management module for performing chunk replication to another DS at the request of an MDS;
A plurality of disks each capable of setting a power mode;
Node power management SW module that sets the power mode for the disk based on the DS power mode setting information and communicates the power mode status of the DS to the integrated power management module.
A disk power management SW module that manages and monitors disk power modes and provides disk power mode status to the MDS.
Cloud storage system with power control switching module.
3. The method of claim 2,
The data server further includes device drivers and adapters, BOIS and adapters, and WOL capable NICs.
Cloud storage system with power control switching module.
In the integrated power management method of a cloud storage system including a metadata server, a data server, a client block, a manager block, and having a power control switching module,
Setting a power mode of the DS through the manager interface;
The integrated power management module transmitting the setting to the node power management SW module of each DS according to the power management policy;
The node power management SW module of each DS establishing a power mode for the disk based on the setting information;
Switching the DS node to the corresponding mode according to the power mode set by the disk power management SW module when no input / output occurs for a predetermined time;
Storing the power mode setting information of the DS and the current power mode state of the DS in a metadata DB.
Integrated power management method of cloud storage system with power control switching module.
5. The method of claim 4,
The power mode of the DS that is set
It is one of Full Power Mode, Disk Power Save Mode, and Server Power Save Mode.
Integrated power management method of cloud storage system with power control switching module.
5. The method of claim 4,
When the power mode of the DS node is switched to the disk power save mode, the DS node is switched to the power-off state of all circuits except the WOL support NIC module
Integrated power management method of cloud storage system with power control switching module.
A data input / output management method of a cloud storage system including a metadata server, a data server, a client block, and a manager block and including a power control switching module,
Transmitting an input / output request for data to the MDS in the client block;
Determining, by the metadata management module, a DS to perform input / output of the data;
Determining whether there is a currently operating DS among the DS nodes having the data;
If there is a currently operating DS, the client performing data input / output by communicating with the DS based on the data location information including the information of the currently operating DS;
Data input / output management method of a cloud storage system having a power control switching module.
The method of claim 7, wherein
If there is no currently running DS among the DS nodes having the data,
Transmitting a wait command to the file input / output module;
Selecting one of the DSs to pass a Magic Packet (Wake on Lan signal) to the DS node;
When the booting of the DS node receiving the magic packet signal is completed, transmitting the power mode state of the booted DS to the integrated power management module by the node power management SW module of the DS;
Delivering, by the integrated power management module, updated status information of the DS node to the metadata management module;
Transmitting, by the metadata management module, data location information including updated status information of the corresponding DS to the file input / output module; And
Client performing data input / output by communicating with the DS based on the data location information including the updated status information of the DS.
Data input / output management method of a cloud storage system having a power control switching module.

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