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1.发明申请公开(公告)号：US20180307638A1
公开(公告)日：2018-10-25
申请号：US15895752
申请日：2018-02-13
Inventor： Ki-Sung JIN , Young-Kyun KIM , Hong-Yeon KIM , Sang-Min LEE
CPC classification number: G06F13/28 , G06F3/0643 , G06F3/0659 , G06F9/544 , G06F9/545 , G06F16/1824 , G06F16/188 , H04L67/1097
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.
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2.发明申请公开(公告)号：US20190243908A1
公开(公告)日：2019-08-08
申请号：US16199036
申请日：2018-11-23
Inventor： Sang-Min LEE , Hong-Yeon KIM , Young-Kyun KIM
IPC: G06F17/30
CPC classification number: G06F16/172 , G06F16/182
Abstract: Disclosed herein are a storage server and an adaptive prefetching method performed by the storage server in a distributed file system. An adaptive prefetching method includes receiving, by a management request processing unit of a storage server, a stream generation request from a client, sending, by the management request processing unit, a stream identifier and information about an I/O worker, which correspond to the stream generation request, to the client, receiving, by the management request processing unit, a read request from the client, inserting, by the management request processing unit, the read request into a queue of the I/O worker corresponding to the read request, performing, by the I/O worker, adaptive prefetching for the read request using an identifier of a file object of stream information corresponding to the read request, and transmitting, by the I/O worker, data that is read by performing adaptive prefetching to the client.
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3.发明申请公开(公告)号：US20190129976A1
公开(公告)日：2019-05-02
申请号：US16158088
申请日：2018-10-11
Inventor： Myung-Hoon CHA , Young-Kyun KIM , Hong-Yeon KIM , Sang-Min LEE
IPC: G06F17/30
Abstract: Disclosed herein is an apparatus for controlling synchronization of metadata, which includes a transaction creation unit for creating a transaction corresponding to a request for an operation for metadata, the request being received from a client; a journal management unit for storing the transaction in a journal; a journal synchronization unit for comparing the journal with an external journal in a node connected with the apparatus and transmitting and receiving only inconsistencies therebetween, thereby synchronizing the journal; and an operation-processing unit for processing the request for the operation or the transaction for the metadata.
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公开(公告)号：US20180205613A1
公开(公告)日：2018-07-19
申请号：US15662042
申请日：2017-07-27
Inventor： Jeong-Sook PARK , Young-Kyun KIM , Young-Chang KIM , Hong-Yeon KIM , Joon-Young PARK
CPC classification number: H04L41/12 , H04L43/0811 , H04L43/0817 , H04L61/2007 , H04L67/1097
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.
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5.发明申请公开(公告)号：US20180203875A1
公开(公告)日：2018-07-19
申请号：US15661961
申请日：2017-07-27
Inventor： Joon-Young PARK , Young-Kyun KIM , Young-Chang KIM , Hong-Yeon KIM , Jeong-Sook PARK
CPC classification number: G06F16/183 , G06F16/148 , H04L67/06 , H04L67/1008 , H04L67/1023 , H04L67/1031 , H04L67/1097
Abstract: Disclosed herein are a method for extending and shrinking a volume of a distributed file system based on a torus network and an apparatus for the same. The method for extending a volume includes searching for a volume neighboring a target volume, the extension of which is requested; determining a direction in which a data server is to be added in consideration of whether the neighboring volume is to be extended; searching for multiple candidate data servers in the direction in which a data server is to be added based on the target volume; and adding any one of the multiple candidate data servers to the target volume in consideration of at least one of a server state and a network communication cost.
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Patent Agency Ranking
公开(公告)号：US20190155922A1
公开(公告)日：2019-05-23
申请号：US16176809
申请日：2018-10-31
Inventor： Young-Chang KIM , Young-Kyun KIM , Hong-Yeon KIM , Jeong-Sook PARK , Joon-Young PARK
Abstract: Disclosed herein are a server for a torus network-based distributed file system and a method using the server. A management server includes a system information storage unit for storing system information of a torus network-based distributed file system, a system management unit for managing one or more metadata servers that store metadata of files and multiple data servers that are included in the torus network to distribute and store data, and a communication unit for communicating with a switch connected from a first plane in the torus network or from outside the torus network to a client, and communicating with the metadata servers and the data servers.
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7.发明申请公开(公告)号：US20180322142A1
公开(公告)日：2018-11-08
申请号：US15941962
申请日：2018-03-30
Inventor： Sang-Min LEE , Young-Kyun KIM , Hong-Yeon KIM
IPC: G06F17/30
CPC classification number: G06F17/30203 , G06F17/30106 , G06F17/30117
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.
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8.发明申请DISTRIBUTED FILE SYSTEM USING TORUS NETWORK AND METHOD FOR CONFIGURING AND OPERATING DISTRIBUTED FILE SYSTEM USING TORUS NETWORK 审中-公开使用多功能网络的分布式文件系统和使用多功能网络配置和操作分布式文件系统的方法公开(公告)号：US20160301754A1
公开(公告)日：2016-10-13
申请号：US15010373
申请日：2016-01-29
Inventor： Sang-Min LEE , Young-Kyun KIM , Hong-Yeon KIM
IPC: H04L29/08 , H04L12/803 , H04L12/24
CPC classification number: H04L67/1097 , G06F17/30067 , 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.
Abstract translation: 这里公开了使用环面网络的分布式文件系统。 分布式文件系统可以包括多个服务器。 多个服务器通过n维环面网络彼此连接，并且多个服务器中的每一个可以沿着n维轴排列。 在分布式文件系统的服务器中，（n-1）维环网的服务器组可以连接到公共网络。 可以基于轴分布不同分布式文件系统的负载。 通过分发，可以提高分布式文件系统的处理性能。
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公开(公告)号：US20180212795A1
公开(公告)日：2018-07-26
申请号：US15663477
申请日：2017-07-28
Inventor： Chei-Yol KIM , Dong-Oh KIM , Young-Kyun KIM , Young-Chul KIM , Hong-Yeon KIM
IPC: H04L12/403 , G06F3/06
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.
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公开(公告)号：US20150242437A1
公开(公告)日：2015-08-27
申请号：US14629513
申请日：2015-02-24
Inventor： Sang-Min LEE , Hong-Yeon KIM , Young-Kyun KIM
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).
Abstract translation: 公开了一种在客户端和服务器分离的分布式文件系统中读取数据的方法和装置。 在该方法和装置中，执行预取操作以提供即使在分布式文件系统中具有高性能的连续读取功能，使得当客户端中的本地文件系统的最佳连续读取功能可以被有效地支持时， 客户端请求连续读取文件（或块）。
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