公开(公告)号：US20160274980A1

公开(公告)日：2016-09-22

申请号：US15073072

申请日：2016-03-17

Applicant: Electronics and Telecommunications Research Institute

Inventor： Young Chul KIM ,  Young Kyun KIM ,  Sang Min LEE

IPC: G06F11/14 ,  G06F17/30

CPC classification number: G06F11/1464 ,  G06F11/1451 ,  G06F11/1453 ,  G06F2201/825 ,  G06F2201/84

Abstract: Provided herein is a distributed file system including a meta data server configured to store and manage meta data of a file; and a data server configured to store and manage data and attribute information of the file, wherein, in response to a writing request from a client, the meta data server stores data requested to be changed in a delta chunk of a read-only snapshot file, and connects the original file and the read-only snapshot file in an inode structure.

Abstract translation: 本文提供了一种分布式文件系统，包括配置为存储和管理文件的元数据的元数据服务器; 以及数据服务器，被配置为存储和管理文件的数据和属性信息，其中响应于来自客户端的写入请求，元数据服务器将请求改变的数据存储在只读快照文件的增量块中 ，并且以inode结构连接原始文件和只读快照文件。

公开(公告)号：US20180101543A1

公开(公告)日：2018-04-12

申请号：US15586083

申请日：2017-05-03

Applicant: Electronics and Telecommunications Research Institute

Inventor： Myung Hoon CHA ,  Sang-Min LEE ,  Young Kyun KIM ,  Hong Yeon KIM

IPC: G06F17/30

Abstract: A distributed storage server includes a plurality of data server devices and a plurality of metadata server devices. The metadata server devices store metadata associated with data which is distributively stored in the data server devices. A selected metadata server device checks whether a dangling directory occurs by performing a rename operation, based on information associated with a full path of a parent directory of a source and a full path of a parent directory of a target included in a request of the rename operation. When it is determined that the dangling directory does not occur, the selected metadata server device processes transactions directed to the metadata such that the rename operation is performed. The checking whether the dangling directory occurs is performed before a transaction period for processing the transactions.

公开(公告)号：US20160292001A1

公开(公告)日：2016-10-06

申请号：US15086234

申请日：2016-03-31

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Jeong Sook PARK ,  Young Kyun KIM

IPC: G06F9/455 ,  G06F17/30

CPC classification number: G06F9/45558 ,  G06F17/30132 ,  G06F17/30203 ,  G06F17/30238 ,  G06F2009/45575 ,  G06F2009/45583

Abstract: Provided herein is a system and method for providing a virtual desktop service using a cache server, the system including a host server configured to provide the virtual desktop service to a user's device using a virtual machine, a distributed file system configured to store data for the virtual machine, and a cache server configured to, when a request to process data reading is received from the virtual machine inside the host server, pre-read a data segment for the requested process of data reading from the distributed file system and store the pre-read data segment in a cache, and perform the process of data reading using the cache.

Abstract translation: 本文提供了一种用于使用高速缓存服务器来提供虚拟桌面服务的系统和方法，所述系统包括被配置为使用虚拟机将虚拟桌面服务提供给用户的设备的主机服务器，被配置为存储用于该虚拟桌面服务的数据的分布式文件系统 虚拟机和高速缓存服务器，被配置为当从主机服务器内部的虚拟机接收到处理数据读取的请求时，从分布式文件系统预读取所请求的数据读取过程的数据段并存储预先 在缓存中读取数据段，并使用高速缓存执行数据读取过程。

公开(公告)号：US20150026126A1

公开(公告)日：2015-01-22

申请号：US14071796

申请日：2013-11-05

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Sang-Min LEE ,  Hong Yeon KIM ,  Young Kyun KIM

IPC: G06F17/30

CPC classification number: G06F16/1844

Abstract: 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.

Abstract translation: 提供了一种有效地复制存储在非对称文件系统中的数据服务器中的数据的方法。 网络的复制处理装置仅将复制请求发送到不复制数据的数据服务器，使得可以减少数据块的复制时间并且参考由数据发送的响应消息来延长超时 服务器。 此外，每个数据服务器可以通过流水线数据传输方法有效地将复制数据传输到另一数据服务器。

公开(公告)号：US20150012492A1

公开(公告)日：2015-01-08

申请号：US14082962

申请日：2013-11-18

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Chei Yol KIM ,  Hong Yeon KIM ,  Young Kyun KIM

IPC: G06F17/30

CPC classification number: G06F16/178

Abstract: In order to synchronize a file between transmitting and receiving nodes, when a file is changed, a hint provider of the transmitting node provides a change file and change information about the change file as a hint to a change log generator, the change log generator generates a change log with reference to the change file and the hint, and the generated change log is transmitted to the receiving node by a change log transmitter.

Abstract translation: 为了同步发送节点和接收节点之间的文件，当文件被改变时，发送节点的提示提供者提供改变文件，并且改变关于改变文件的信息，作为改变日志生成器的提示，变更日志生成器 参考变更文件和提示的变更日志，生成的变更日志由变更日志发送部发送给接收节点。

公开(公告)号：US20140229515A1

公开(公告)日：2014-08-14

申请号：US13923476

申请日：2013-06-21

Applicant: Electronics and Telecommunications Research Institute

Inventor： Dong Oh KIM ,  Hong Yeon KIM ,  Young Kyun KIM

IPC: G06F17/30

CPC classification number: G06F16/122

Abstract: An apparatus for managing files in a hybrid storage system establishes a file management policy based on a directory unit using files stored in first and second storage devices and manages the files of the first storage device and the second storage device in accordance with the established file management policy based on the directory unit.

Abstract translation: 用于管理混合存储系统中的文件的装置使用存储在第一和第二存储装置中的文件，基于目录单元建立文件管理策略，并根据所建立的文件管理来管理第一存储装置和第二存储装置的文件 基于目录单元的策略。