Patent application number | Description | Published |
20090150395 | SYSTEM AND METHOD FOR UPDATING FILE - Provided is a system and method for updating a plurality of the same files consistently. The file update system comprises a first and a second data servers formed as pipe line type network for storing an original file and a duplicate file of the original file respectively, and for updating both the original file and the duplicate file in response to an update request, wherein the first and the second data servers mutually exchange file update information, correct the file update information so as to prevent overlapped update due to a plurality of update requests for the same file, and then update the original file or the duplicate file according to the corrected file update information. | 06-11-2009 |
20090157694 | METHOD AND SYSTEM FOR MANAGING FILE METADATA TRANSPARENT ABOUT ADDRESS CHANGES OF DATA SERVERS AND MOVEMENTS OF THEIR DISKS - Provided are a method and a system for managing a file metadata, which are independent of a address change of a data server and movements of a disk by using a location of disk where data exists actually as a location information of a file data. The method for managing the file metadata includes determining whether the request of the metadata is valid, verifying information of a disk storing a file data corresponding to the metadata and a data server address in which the file data exists, and transmitting the verified address of the data server to the client. According to the method and the system for managing the file metadata, data services can be continuously provided without modifications of a file metadata even if the data server address is changed. | 06-18-2009 |
20090157769 | FILE STORAGE SYSTEM AND METHOD FOR MANAGING DUPLICATE FILES IN FILE STORAGE SYSTEM - Provided are a file storage system, and a method for managing duplicate files in the file storage system. The file storage system that performs file duplication for error recovery includes a client for requesting generation of a duplicate file of a new file being stored, a metadata server for storing information associated with prestored duplicate files and determining whether a file that is identical to the new file is present among the prestored duplicate files, to limit a number of identical duplicate files to a preset number, and a data server comprising a file duplication unit and a storage unit for respectively performing file duplication and file storage under the control of the metadata server. Accordingly, file recovery can be performed while duplicate files in the system are minimized. | 06-18-2009 |
20090306850 | System for monitoring DPF using wireless communication - The present invention relates to a system for monitoring DPF which can inform a point of time for regenerating the DPF to a driver. The system for monitoring DPF using wireless communication, which comprises a filter for gathering PM (Particulate Matter) and at least one or more pressure sensors and temperature sensors, comprises a monitoring part and a server system. | 12-10-2009 |
20100142537 | PACKET TRANSPORT LAYER APPARATUS - There is provided a packet transport layer apparatus. The packet transport layer apparatus can receive frames having different formats via a single port by dividing a single physical port into a plurality of virtual ports according to each frame format, can increase the number of customer virtual local area networks (C-VLANs) and the number of service VLANs (S-VLANs) being usable at the same time by assigning a different component identifier (ID) to each frame format and using the component ID as a factor used in searching a filtering table, and can translate a frame format to be suited to a frame format allocated to a virtual output port. | 06-10-2010 |
20100161780 | HOT DATA MANAGEMENT METHOD BASED ON HIT COUNTER - Provided is a hot data management method based on hit counter, which prevents loads from being concentrated on a specific data server due to hot data by efficiently managing the hot data in the asymmetric storage system. Each of data servers of an asymmetric storage system checks hit counter for data stored in the corresponding data server to maintain hit counter information on the data in a latest state. The data server transmits the hit counter information to a metadata server at predetermined intervals. The data server makes or deletes a copy of the data according to the determination of the metadata server whether the data is hot data. | 06-24-2010 |
20100161897 | METADATA SERVER AND DISK VOLUME SELECTING METHOD THEREOF - A metadata server in an asymmetric cluster file system detects the used capacity and the free capacity of a disk volume in a data server to allocate chucks. The method for selecting a disk volume includes receiving status information from a data server periodically and adjusting the standby command number of a disk volume in the disk server on the basis of the status information, and selecting a disk volume for chunk allocation on the basis of the standby command number in response to a chunk allocation request from a client. | 06-24-2010 |
20100290340 | METHOD FOR PROTECTION SWITCHING - A method for protection switching of a ring network, which includes a plurality of nodes disposed in a ring shape, includes: allowing a node adjacent to a failure link among the plurality of nodes to generate a failure protection switching frame when the failure link is generated in the ring network; allowing the node adjacent to the failure link to transmit the failure protection switching frame to an adjacent node; allowing each of the plurality of nodes to delete address lists connected with the ring network except for an external network (hereinafter referred to as subnet) from their own forwarding table; allowing each of the plurality of nodes to transmit a subnet address list protection switching frame including a subnet address list; and allowing a node receiving the subnet address list protection switching frame to update the forwarding table on the basis of the subnet address list included in the frame. | 11-18-2010 |
20100296416 | METHOD FOR UPDATING FILTERING DATABASE IN MULTI-RING NETWORK - A method for updating a filtering database in a multi-ring network, includes: when the topology of a lower ring in a multi-ring network, in which a plurality of ring networks are connected by two ring connection nodes, is altered and the ring connection node detects the alteration in the topology of the lower ring, erasing, by the ring connection node, its filtering database; generating, by the ring connection node, a control message including a ring ID, a blockage flag, and an erasure flag; transmitting the control message in both directions of the ring; and determining, by a node which receives the control message, to erase a filtering database by referring to and correcting the blockage and erasure flag information included in the control message. | 11-25-2010 |
20100302967 | METHOD AND APPARATUS FOR MEASURING NETWORK DELAY IN ETHERNET RING NETWORK - A node generates a delay measurement frame and transmits it to an adjacent node of an Ethernet ring network in order to measure a delay of the network. The node receives the delay measurement frame generated by the node from another adjacent node of the ring network, and measures a network delay by using the received delay measurement frame. | 12-02-2010 |
20110019536 | METHOD FOR MANAGING ETHERNET RING NETWORK OF VLAN-BASED BRIDGE - There is provided a method for managing an Ethernet ring network of a VLAN-based bridge that includes: registering a major-ring VID (VLAN ID) in a ring port filtering database of a ring protection link owner node in accordance with a request for registering the major ring VID (VLAN ID) from an ERP (Ethernet Ring Protection) controller mounted on the ring protection link owner node of a major ring; delivering, by the ring protection link owner node, a VID registration message to other nodes which belong to the major ring through a ring port; receiving the VID registration message through the ring port and registering the major ring VID in a ring port filtering database of each node itself, by each node which belongs to the major ring; and delivering, by each node which belongs to the major ring, the VID registration message to other nodes which belong to the major ring through the ring port. | 01-27-2011 |
20110044166 | METHOD FOR OPERATING NODE IN ETHERNET RING NETWORK - A ring protection link (RPL) owner node in a ring network transmits a ring-automatic protection switching (R-APS) frame in a burst mode until blocked ports of all nodes except the RPL owner node have been unblocked, and, if it is determined that all the nodes have been unblocked, transmits the R-APS frame in a continuous mode. In this manner, the time required to unblock all the nodes can be reduced. | 02-24-2011 |
20110154100 | APPARATUS AND METHOD OF PERFORMING ERROR RECOVERING PROCESS IN ASYMMETRIC CLUSTERING FILE SYSTEM - The present invention relates to an apparatus and method of performing an error recovery process in an asymmetric clustering file system that has higher efficiency in data recovery when a data server in an asymmetric clustering file system fails than a method of processing the data recovery in the metadata server. The present invention includes receiving a chunk list requiring recovery by a data server included in the other data server groups than a data server group including a failed data server among a plurality of data server groups, requesting chunk data necessary for recovering an erroneous chunk from a data server in the other data server groups to the other data servers than the failed data server in the data server group, and recovering the erroneous chunk based on the chunk data by the data server in the other data server group. | 06-23-2011 |
20120150924 | APPARATUS FOR SUPPORTING CONTINUOUS READ/WRITE IN ASYMMETRIC STORAGE SYSTEM AND METHOD THEREOF - Disclosed are an apparatus for supporting continuous read/write in an asymmetric storage system, and a method thereof are provided. The apparatus for supporting continuous read/write in an asymmetric storage system that permits continuous reading/writing by providing context identifiers for reading or writing files and requesting reading or writing the files, using the context identifiers. Therefore, it is possible to efficiently process continuous reading or writing, improve performance of data service, and reduce waster of a memory by removing context identifies for reading or writing files when the files are not used any more or not frequently used. | 06-14-2012 |
20120151255 | METHOD OF CALCULATING PARITY IN ASYMETRIC CLUSTERING FILE SYSTEM - Disclosed is a method of calculating parity. The method dividing, by a client system, a file which is to be stored into chunks of a preset size and distributively storing the chunks in a plurality of data servers; sending, by the client system, a data write complete notification message to a metadata server; storing, by the metadata server, a file sent through the data write complete notification message in a recovery queue; and sending, by the metadata server, a random data server a parity calculation request for the file stored in the recovery queue. | 06-14-2012 |
20120285162 | FUEL CELL-ENGINE HYBRID SYSTEM - The present invention relates to a fuel cell-engine hybrid system formed to effectively utilize an exhaust gas discharged from a process for generating electricity. A fuel cell-engine hybrid system according to the present invention includes: an electricity generating unit including a cathode and an anode interposing an electrolyte membrane therebetween; and an engine unit connected to a rear end of the electricity generating unit and generating power by receiving the exhaust gas discharged from the anode. | 11-15-2012 |
20130226867 | APPARATUS AND METHOD FOR CONVERTING REPLICATION-BASED FILE INTO PARITY-BASED FILE IN ASYMMETRIC CLUSTERING FILE SYSTEM - Disclosed herein are an apparatus and method for converting a replication-based file into a parity-based file in an asymmetric clustering file system. The apparatus includes a reception unit, a control unit, a parity computation unit, and a chunk conversion unit. The reception unit receives a parity-based conversion request, information about the size of a stripe, and a list of new chunks from a metadata server. The control unit divides a replication chunk, selected from among a plurality of replication chunks corresponding to an original chunk of the replication-based file, into a plurality of data segments. The parity computation unit generates at least one parity segment by performing a parity operation on the plurality of data segments. The chunk conversion unit selects one of different data segments from the original chunk or one of the plurality of replication chunks, the different data segments having locations different from one another. | 08-29-2013 |
20140126371 | FLOW SWITCH AND OPERATING METHOD THEREOF - An exemplary embodiment of the present invention provides a flow switch, and an operating method thereof, and more particularly, to a flow switch for providing network virtualization, in which a quality of service (QoS) for a packet for each virtual machine is easily secured through flow information extracted from each of a plurality of packets when the plurality of packets generated by a plurality of virtual machines is input in a server virtualization environment, and an operating method thereof. | 05-08-2014 |
20140201738 | SWITCH AND METHOD FOR GUARANTEEING QUALITY OF SERVICE OF MULTI-TENANT CLOUD SERVICE AND SYSTEM HAVING THE SAME SWITCH - Provided are a method, apparatus, and system for providing a multi-tenant cloud service, which can guarantee quality of service (QOS) in units of flows and virtual machines (VMs). A dynamic virtual flow switch includes a switch flow agent configured to receive and store virtual machine QOS information about each of a plurality of virtual machines operating in a plurality of computer servers and flow QOS information about a flow generated by the virtual machine from a virtual flow controller and a flow processing unit configured to receive the flow generated by the virtual machine and determine a QOS priority of the flow based on the stored virtual machine QOS information of the virtual machine and flow QOS information of the flow. | 07-17-2014 |
20140317223 | SYSTEM AND METHOD FOR PROVIDING VIRTUAL DESKTOP SERVICE USING CACHE SERVER - There are provided a system and method for providing a virtual desktop service using a cache server. A system for providing a virtual desktop service according to the invention includes a host server configured to provide a virtual desktop service to a client terminal using a virtual machine, a distributed file system configured to store data for the virtual machine, and a cache server that is provided for each host server group having at least one host server, and performs a read process or a write process of data using physically separate caches when the read process or write process of the data is requested from the virtual machine in the host server. | 10-23-2014 |
20140324951 | NETWORK SELECTING APPARATUS AND OPERATING METHOD THEREOF - Disclosed herein is a network selecting apparatus including: a determining unit checking an operation state of a cache server in which replicated data corresponding to a data request signal are stored and determining whether the cache server is normally operated, when the data request signal is received from a client; and a selecting unit selecting a first network so that the replicated data are transmitted to input and output devices when the cache server is normally operated and selecting a second network so that original data corresponding to the data request signal are transmitted from a storage server in which the original data are stored to the input and output devices when the cache server is not normally operated. | 10-30-2014 |
20140337856 | DATA PARALLEL PROCESSING APPARATUS WITH MULTI-PROCESSOR AND METHOD THEREOF - The present invention suggests a data parallel processing device that performs parallel processing on input data by varying a flow ID generating manner depending on a loading degree of the processor in the multi-processor structure configured by processor array. The suggested device includes a flow ID generating unit which generates a flow ID for input data which is differentiated in accordance with a status of a buffer; a data allocating unit which allocates data having the same flow ID to a specified processor; and a data processing unit which sequentially processes data allocated to each processor so that the parallel processing performance is improved as compared with the related art. | 11-13-2014 |
20140375818 | DISTRIBUTING NETWORK CAMERA SYSTEM AND METHOD FOR OPERATING SAME - A distributed network camera system includes a network camera configured to be connected to a network; and a distributed media server configured to process video data provided by the network camera in a network node which is located close to the network camera. Further, the distributed network camera system includes a centralized management server configured to be connected to the network and manage the connection establishment between the distributed media server and the network camera and the operation state of the distributed media server. | 12-25-2014 |
20140376555 | NETWORK FUNCTION VIRTUALIZATION METHOD AND APPARATUS USING THE SAME - A network function virtualization device includes at least one network function virtual machine; and a network function flow switch configured to receive flows and to switch the flows to the at least one network function virtual machine, and a network functions virtualization method for applying the virtualized network function to the flows. | 12-25-2014 |
20150026126 | METHOD OF REPLICATING DATA IN ASYMMETRIC FILE SYSTEM - A method of efficiently replicating data stored in data servers in an asymmetric file system is provided. A replication processing apparatus of a network transmits a replication request only to a data server that does not replicate data so that it is possible to reduce replication time of a data block and to extend time-out with reference to a response message transmitted by the data server. In addition, each of the data servers may efficiently transmit copy data to another data server by a pipeline data transmission method. | 01-22-2015 |
20150055775 | IMAGE PROCESSING APPARATUS AND OPERATION METHOD THEREOF - An exemplary embodiment provides an image processing apparatus, including: a first detector configured to detect a privacy image from a first image when the first image is input; a protection processor configured to scramble the privacy image to a privacy protection image using a scrambling key when the privacy image is detected; and an encryption processor configured to create a second image in which the first image including the privacy protection image is encrypted using an encryption key. | 02-26-2015 |
20150074166 | METHOD AND APPARATUS FOR PROCESSING MULTI-LAYER DATA - An apparatus for processing multi-layer data, the apparatus comprising: a lower layer switch configured to classify lower layer data based on frame or packet from multi-layer data having different properties for switching processing; and an upper layer switch configured to generate flows of the multi-layer data having different properties based on upper layer information or lower layer information. | 03-12-2015 |