Sun Yat-senuniversity

The First Affiliated Hospital of Sun Yat-sen University

National Supercomputer Centre in Guangzhou of Sun Yat-sen University

School of Data and Computer Sciences of Sun Yat-sen University

School of Data and Computer Science of Sun Yat-sen University

Yutong Lu

Zhiguang Chen

Yunfei Du

Nong Xiao

Xi Zhang

Yao Lu

Liwei Yan

Jian Qi

Xiaolin Liu

Qingtang Zhu

Fang Liu

Tao Lin

Jiawen Luo

Xianqi Zheng

Guixin Guo

Zhongzhu Zhou

Zejie Hu

Jia Ma

Kangyou Zhong

Shuang Zhu

Liang Du

Yongze Guo

Sha Yu

A directory management method and system for a file system based on Cuckoo hash are provided, including the steps of reading metadata of a sub-directory or a sub-file, used as a target file, in a directory: receiving a request for reading the target file in the directory; for the target file, determining an icandidate data block, in a hash table of the directory according to a hash calculation result obtained by performing hash calculation on a filename filename of the target file according to an ihash function of Cuckoo hash iteratively; if the filename filename of the target file exists in the icandidate data block, reading metadata of the target file and returning the metadata, and ending the process; otherwise, continuing to iterate until the iteration ends and returning a message that the target file does not exist.

Directory management method and system for file system based on Cuckoo hash and storage medium

Provided in the present invention are a Pull mode and Push mode combined resource management and job scheduling method and system, and a medium. The present invention includes parsing or identifying jobs to determine types, scheduling the jobs according to the types, and for high-performance computing jobs, distributing the jobs by using a Push mode: distributing computing nodes for the high-performance computing jobs, and pushing the high-performance computing jobs to the distributed computing nodes for execution; and for a big data processing job, using a Pull mode to perform distribution: waiting for a job request of each computing node, and when the computing node actively transmits the job request, transmitting the big data processing job to the computing node, which actively transmits the job request, for execution.

Pull mode and push mode combined resource management and job scheduling method and system, and medium

Provided in the present invention are a K-Truss graph-based storage system cache prefetching method, a system, and a medium, where method steps of the present invention include: when a data request stream in a system arrives, an access mode of the data request stream is determined; if said mode is a sequence mode, then n sequence blocks after a data block corresponding to the data request stream are prefetched and serve as prefetch data; otherwise, the data block corresponding to the data request stream serves as a query vertex to query a K-Truss graph, a truss structure matching the query vertex is obtained, and data of a data block from within the truss structure is obtained and serves as prefetch data; the K-Truss graph is updated according to the data block corresponding to the data request stream; and lastly a prefetch data block is prefetched into a main memory.

Cache prefetching method and system based on K-Truss graph for storage system, and medium

A low-latency file system file address space management method and system, and a medium. The method of the present invention comprises: generating a superblock and a block group allocation table from an address space of a storage device, wherein the superblock stores file system information and the allocation situation of block groups on a liner address space of the storage device, and the block group allocation table is used for marking the allocation situation of data blocks in the corresponding block group; when a file is created, dynamically creating or selecting a corresponding block group according to the size of a specified data block and allocating the data block; and writing file data into the allocated data block, and updating the block group allocation table and information of the superblock.

Management method and system for address space of low delay file system and medium

A metadata management method, system and medium are provided. All directories and files in a file system are organized in a tree structure, and all directories and subfiles under a single directory are saved as a whole on a continuous address space of an underlying storage device in the order of creation in sequence. When metadata is updated, update operations on all subdirectories/subfiles under a directory are appended to the tail of the directory in the form of log in order, so that each metadata operation triggers only one IO request. In the process of metadata retrieval, parsing a subdirectory under a parent director requires reading all data on the continuous address space corresponding to the parent directory, and then searching for a match by means of multiple acceleration methods.

Metadata management method, system and medium

A small-file storage optimization system based on a virtual file system in a KUBERNETES user-mode application which is applied to a target file system includes a network file system including a network file system server and a network file system client, a user-mode application mounted on a shared directory exposed by the network file system server through the network file system client, and a virtual file system including a virtual file system client and a virtual file system server. A file block creating and formatting module in the virtual file system server creates a virtual file block for storing small files on one or more object storage target devices of the target file system, and the virtual file block is mounted on the shared directory exposed by the network file system server.

Small-file storage optimization system based on virtual file system in KUBERNETES user-mode application

The present invention relates to fields of clinical application of nerve defect repair and the medical three-dimensional (3D) printing technology, and provides an integrated visualization method for three-dimensional (3D) reconstruction of internal structure of human peripheral nerves. The method comprises the following steps: obtaining human peripheral nerves, preparing nerve specimens ex vivo by staining with an iodine preparation in combination with a freeze-drying method; scanning the pretreated peripheral nerves using Micro CT to acquire lossless two-dimensional images, and performing binarization processing to the two-dimensional images, then conducting image segmentation based on textural features to acquire images of nerve fascicles; finally, reconstructing the segmented images into a visualization model by using a supercomputer.

Integrated method for three-dimensional visualization reconstruction of the fascicular structure inside human peripheral nerves

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Guangdong, China

Yutong Lu