公开(公告)号：US10749709B2

公开(公告)日：2020-08-18

申请号：US15663477

申请日：2017-07-28

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Chei-Yol Kim ,  Dong-Oh Kim ,  Young-Kyun Kim ,  Young-Chul Kim ,  Hong-Yeon Kim

IPC: G06F15/16 ,  H04L12/403 ,  G06F3/06 ,  H04L29/08 ,  G06F16/182

Abstract: Disclosed herein is a distributed file system using a torus network. The distributed file system includes multiple servers. The location of a master server may be determined to shorten the latency of data input/output. The location of the master server may be determined such that the distance between the master server and a node farthest away from the master server, among nodes, is minimized. When the location of the master server is determined, the characteristics of the torus network and the features of a propagation transmission scheme may be taken into consideration.

公开(公告)号：US10574531B2

公开(公告)日：2020-02-25

申请号：US15662042

申请日：2017-07-27

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Jeong-Sook Park ,  Young-Kyun Kim ,  Young-Chang Kim ,  Hong-Yeon Kim ,  Joon-Young Park

IPC: G06F15/173 ,  H04L12/24 ,  H04L29/12 ,  H04L29/08 ,  H04L12/26

Abstract: Disclosed herein are a method for automatically allocating IP addresses for a distributed storage system in a large-scale torus network and an apparatus for the method. The method for automatically allocating IP addresses includes acquiring neighboring-node information from multiple storage nodes that constitute the system; generating torus network topology for the multiple storage nodes by combining the neighboring-node information; generating IP address information through which a position of each of the multiple storage nodes in a structure corresponding to the torus network topology can be identified; and allocating IP addresses to the multiple storage nodes by delivering the IP address information to the multiple storage nodes.

公开(公告)号：US09805055B2

公开(公告)日：2017-10-31

申请号：US14629513

申请日：2015-02-24

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Sang-Min Lee ,  Hong-Yeon Kim ,  Young-Kyun Kim

IPC: G06F17/30 ,  H04L29/08

CPC classification number: G06F17/30194 ,  G06F17/30168 ,  H04L67/2842

Abstract: Disclosed are a method and apparatus for reading data in a distributed file system in which a client and a server are separated. In the method and apparatus, a prefetching operation is performed to provide a continuous read function with high performance even in the distributed file system so that an optimum continuous read function of a local file system within the client may be effectively supported when an application program of the client requests continuous reading on a file (or chunk).

公开(公告)号：US09680954B2

公开(公告)日：2017-06-13

申请号：US14193736

申请日：2014-02-28

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Jeong-Sook Park ,  Soo-Young Kim ,  Chei-Yol Kim ,  Young-Chang Kim ,  Sang-Min Lee ,  Hong-Yeon Kim ,  Young-Kyun Kim

IPC: H04L29/08

CPC classification number: H04L67/2842 ,  H04L67/1097 ,  H04L67/2847

Abstract: 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.

公开(公告)号：US10929354B2

公开(公告)日：2021-02-23

申请号：US15941962

申请日：2018-03-30

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Sang-Min Lee ,  Young-Kyun Kim ,  Hong-Yeon Kim

IPC: G06F7/02 ,  G06F16/00 ,  G06F16/182 ,  G06F16/14 ,  G06F16/16

Abstract: Disclosed herein are a metadata server and a method for distributing metadata in units of directories using the metadata server. The method includes receiving a request for at least one of creation, deletion and retrieval from a user file system; acquiring an inode corresponding to an identifier of a parent inode, which is included in the request; searching the parent inode for a dentry corresponding to the request when the request is a request to create a directory; selecting a secondary metadata server in which a new directory is to be created in order to distribute metadata in units of directories; requesting the selected secondary metadata server to create an inode; receiving an identifier of the created inode from the secondary metadata server; and adding a new dentry to the parent inode using the identifier of the inode.

公开(公告)号：US10565142B2

公开(公告)日：2020-02-18

申请号：US15895752

申请日：2018-02-13

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Ki-Sung Jin ,  Young-Kyun Kim ,  Hong-Yeon Kim ,  Sang-Min Lee

IPC: G06F15/167 ,  G06F13/28 ,  G06F3/06 ,  G06F9/54 ,  H04L29/08 ,  G06F16/188 ,  G06F16/182

Abstract: Disclosed herein are a method and system for supporting user-level DMA I/O in a distributed file system environment. The system includes a DMA I/O library located in a user space and configured to process data-processing requests of an application using a control channel or a data channel, a distributed file system client process located in the user space and configured to process data while communicating with a remote distributed storage cluster, a VFS located in a kernel space, and a FUSE kernel module located in the kernel space, wherein the control channel is a path along which the DMA I/O library and the distributed file system client process are connected to each other through the VFS and the FUSE kernel module, and wherein the data channel is a path along which the DMA I/O library and the distributed file system client process are directly connected to each other.

公开(公告)号：US10084860B2

公开(公告)日：2018-09-25

申请号：US15010373

申请日：2016-01-29

Applicant: Electronics and Telecommunications Research Institute

Inventor： Sang-Min Lee ,  Young-Kyun Kim ,  Hong-Yeon Kim

IPC: H04L29/08 ,  H04L12/24 ,  G06F17/30

CPC classification number: H04L67/1097 ,  G06F16/10 ,  G06F16/183 ,  H04L41/12 ,  H04L41/5041

Abstract: Disclosed herein is a distributed file system using a torus network. The distributed file system may include multiple servers. The multiple servers are connected with each other through an n-dimensional torus network, and each of the multiple servers may be arranged along n-dimensional axes. Among the servers in the distributed file system, a server group of an (n−1)-dimensional torus network may be connected to a public network. Different loads of the distributed file system may be distributed based on the axes. Through the distribution, the processing performance of the distributed file system may be improved.