Patent application number | Description | Published |
20090150717 | AVAILABILITY PREDICTION METHOD FOR HIGH AVAILABILITY CLUSTER - Provided is an availability prediction method for a high availability. The method includes calculating a basic survival probability that the other node survives until a failure on one node of two nodes constituting a cluster is fixed, and determining an optimal number of nodes meeting a preset reference availability probability by calculating an availability probability for a predetermined range of the number of nodes on the basis of the basic survival probability. The method determines the number of nodes in the high availability cluster so as to match a reference availability probability, and is able to accomplish an optimal configuration of a cluster by calculating the availability probabilities for combinations between active node and passive nodes and between head nodes and switches. | 06-11-2009 |
20090150718 | LARGE-SCALE CLUSTER MONITORING SYSTEM, AND METHOD OF AUTOMATICALLY BUILDING/RESTORING THE SAME - Provided are a large-scale cluster monitoring system and a method for automatically building/restoring the same, which can automatically build a large-scale monitoring system and can automatically build a monitoring environment when a failure occurs in nodes. The large-scale cluster monitoring system includes a CM server, a BD server, GM nodes, NA nodes, and a DB agent. The CM server manages nodes in a large-scale cluster system. The DB server stores monitoring information that is state information of nodes in groups. The GM nodes respectively collect the monitoring information that is the state information of the nodes in the corresponding groups to store the collected monitoring information in the DB server. The NA nodes access the CM server to obtain GM node information and respectively collect the state information of the nodes in the corresponding groups to transfer the collected state information to the corresponding GM nodes. The DB agent monitors the monitoring information of the nodes in the groups, which is stored in the DB server, to detect a possible node failure. | 06-11-2009 |
20090157894 | SYSTEM AND METHOD FOR DISTRIBUTING MULTIMEDIA STREAMING SERVICE REQUEST BASED ON WIDE AREA NETWORK - Provided are a system and a method for distributing multimedia streaming service request based on wide area network which can efficiently support multimedia streaming service in wide area network. The system for distributing multimedia streaming service request based on wide area network includes a user terminal, a wide area server, and a local server. The user terminal requests multimedia streaming service. The wide area server for selecting a local server which is disposed nearest to the user terminal and has node availability and service availability, and providing contents requested by the user terminal to the selected local server. The local server provides the multimedia streaming service to the user terminal using the contents provided from the wide area server. | 06-18-2009 |
20090158083 | CLUSTER SYSTEM AND METHOD FOR OPERATING THE SAME - Provided are a cluster system, which makes general nodes appear as if they provide seamless services without failure when seen from the outside, and a method for operating the cluster system. The cluster system for operating individual nodes in a distributed management manner includes a board server having a task board registered with a task list, an agent server for managing the task board, and a plurality of general server nodes for performing a corresponding task on the basis of the task list, among which a failed general server node is replaced with another normal general server node. | 06-18-2009 |
20110084969 | METHOD AND APPARATUS FOR OBTAINING MINIMUM COST VECTOR FOR MAKING SKYLINE OBJECT IN MULTI-DIMENSIONAL SPACE - Provided are a method and apparatus for obtaining a minimum cost vector for making a skyline object in a multi-dimensional space. The method includes calculating respective vector values having a query point and respective moving points to which the query point is moved as both end points in a multi-dimensional space having a plurality of coordinate axes, and selecting a vector value whose moving point is included in a skyline and has the minimum distance value from the query point as the minimum vector value from among the vector values. | 04-14-2011 |
20120166630 | DYNAMIC LOAD BALANCING SYSTEM AND METHOD THEREOF - Disclosed is a dynamic load balancing system. The dynamic load balancing system includes a resource management master managing bare servers that do not execute services and having a hierarchical structure and a service master dynamically allocating the bare servers to a load balancing server or a service execution server or dynamically releasing the pre-allocated load balancing server or service execution server by the bare servers, in consideration of monitoring information on a state or performance of a server and service requirements to be provided. | 06-28-2012 |
20130103708 | APPARATUS AND METHOD FOR ENABLING CLIENTS TO PARTICIPATE IN DATA STORAGE IN DISTRIBUTED FILE SYSTEM - Disclosed herein are an apparatus and method for enabling clients to participate in data storage in a distributed file system. The client device of a distributed file system according to the present invention includes a storage determination unit and a file reading unit. The storage determination unit determines whether first metadata information, including a global generation number of the chunk corresponding to a file to be read, has already been stored in the local storage. The file reading unit performs a read operation on the file using local data corresponding to the first metadata information if, as a result of the determination, it is determined that the first metadata information has already been stored. | 04-25-2013 |
20130117302 | APPARATUS AND METHOD FOR SEARCHING FOR INDEX-STRUCTURED DATA INCLUDING MEMORY-BASED SUMMARY VECTOR - An apparatus and method for searching for index-structured data including a memory-based summary vector are disclosed. The apparatus for searching for index-structured data including a memory-based summary vector includes a storage unit configured to store a full index and data related to a key; and a key lookup engine configured to include not only a summary vector but also an index storing information related to the full index, search for data stored in the storage unit through the index, and return the searched result. | 05-09-2013 |
20130160006 | APPARATUS AND METHOD FOR CONTROLLING SENSOR DATA IN CLOUD SYSTEM - Disclosed herein is an apparatus for controlling sensor data in a cloud system. The apparatus includes a plurality of virtual machines, and a service module. Each of the plurality of virtual machines obtains sensor information about a user terminal by driving an internal sensor data processing module at a request of the corresponding user terminal, and provides the application execution environment of a requested service by connecting to the user terminal over a network. The service module provides an application corresponding to the requested service to a virtual machine which requested the service. When a sensor Application Programming Interface (API) of the user terminal is called by the application, the virtual machine requests sensor data from the user terminal based on the sensor information about the user terminal, and provides the result of measurement of the sensor data from the user terminal to the corresponding application. | 06-20-2013 |
20140125128 | POWER REDUNDANCY APPARATUS FOR RACK-MOUNTED SERVER - A power redundancy apparatus for a rack-mounted server may include a first server that includes first and second connectors connected in parallel to the output side of a first PSU, a second server that includes third and fourth connectors connected in parallel to the output side of a second PSU, and a power connection cable for coupling any one of the first and the third connectors, the second and the fourth connectors, the first and the fourth connectors, and the second and the third connectors. | 05-08-2014 |
20140214922 | METHOD OF PROVIDING VIRTUAL MACHINE AND SERVICE GATEWAY FOR REAL-TIME VIRTUAL DESKTOP SERVICE - Disclosed herein is a method of providing a virtual machine and service gateway for real-time virtual desktop service. The service gateway includes a user information management unit, a virtual machine information management unit, and a virtual machine generation unit. The user information management unit authenticates user information. The virtual machine information management unit generates access information about a virtual machine corresponding to the user information, and provides the generated access information to a client unit. The virtual machine generation unit selects a service provider server in response to a request from a client unit, and generates a virtual machine in the selected service provider server. | 07-31-2014 |
20140366093 | APPARATUS AND METHOD FOR VIRTUAL DESKTOP SERVICE - Disclosed herein are a method and architecture capable of efficiently providing virtual desktop service. A service architecture for virtual desktop service according to the present invention includes a connection broker configured to perform authentication, manage virtual machines, and perform a server monitoring and protocol coordination function, a resource pool configured to manage software resources that are delivered to a specific virtual machine in a streaming form on a specific time in order to provide on-demand virtual desktop service and are executed on the specific virtual machine and to provide provision information about the managed software resources in response to a request from the connection broker, and a virtual machine infrastructure configured to support hardware resources, generate virtual machines in which the software of a user terminal is executed, and provide the generated virtual machine as virtual desktops. | 12-11-2014 |
20140380089 | METHOD AND APPARATUS FOR RECOVERING FAILED DISK IN VIRTUAL MACHINE - A method and apparatus for recovering the failed disk of a virtual machine in a virtualization system are disclosed. The apparatus includes a system performance analysis unit, a failed disk recovery unit, and a disk exchange unit. The system performance analysis unit calculates recovery resources, that is, network and disk I/O bandwidths, to be assigned to the recovery of a failed disk by analyzing the performance of the virtualization system. The failed disk recovery unit performs the discovery of the failed disk by recovering a copy disk, that is, a copy of the failed disk, using a mandatory disk stored in the virtualization system while ensuring the performance of virtual machines based on the recovery resources. The disk exchange unit deletes the failed disk and assigns the recovered copy disk to a virtual machine corresponding to the failed disk. | 12-25-2014 |
20150026306 | METHOD AND APPARATUS FOR PROVIDING VIRTUAL DESKTOP SERVICE - A method and an apparatus for providing a virtual desktop service to provide an optimal virtual desktop service in accordance with distances between virtualization servers and a user are provided. A virtual desktop service suitable for a request of the user is provided to the user so that loads of servers may be dispersed and power usage of the servers may be minimized. That is, in an environment where the virtualization servers that provide the virtual desktop service are locally dispersed, the virtual machines may be allocated to a virtualization server with a shortest network delay based on network distances from the virtualization servers to the user. In addition, after a server power usage amount is predicted in accordance with a virtual machine usage type of the user, a virtualization server may be selected in accordance with the prediction result. | 01-22-2015 |