Vicente Cheng Email & Phone Number

Taiwan, Taiwan

Mainly working on the Harvester (https://harvesterhci.io/) Project, the cloud-native hyper-converged infrastructure (HCI) solution.

台灣 新北市 新店

Focus on Ceph, fixing bugs, optimizing performance, and implementing features.- CephFS and NFS-Ganesha• Implement folder quotas in an early kernel release and fix some problems. Also implement user quota for cephfs/kernel client.• Reduce memory usage and clean up the mds context lifecycle.• Improve the cache mechanism of libcephfs client.• Introduce the multi-client mechanism on NFS-Ganesha (FSAL_CEPH)• Improve the FSAL_MDCACHE reclaim mechanism to find entries… Show more Focus on Ceph, fixing bugs, optimizing performance, and implementing features.- CephFS and NFS-Ganesha• Implement folder quotas in an early kernel release and fix some problems. Also implement user quota for cephfs/kernel client.• Reduce memory usage and clean up the mds context lifecycle.• Improve the cache mechanism of libcephfs client.• Introduce the multi-client mechanism on NFS-Ganesha (FSAL_CEPH)• Improve the FSAL_MDCACHE reclaim mechanism to find entries faster.• Improve FSAL_CEPH performance by reworking the client mechanism.• Mitigate the lock contention by refactoring the lock scope.• Fix some issues with FSAL_RGW, FSAL_VFS and refactoring Python CLI.- RGW (CEPH OBJECT GATEWAY)•Improve the performance of RGW ElasticSearch module of multisite.•Implement the retention mechanism for RGW versioning.- Miscellaneous Ceph components•Introduce new mgr module to make middleware agents from polling to event-driven.•Various bug fixes to Ceph modules (including osd, mon, msgr, rgw, mds, client).- Performance analysis by checking CPU/network/disk statistics. Profiling of each event call path usage by `Perf`. Also, experience tuning CPU affinity to increase performance.- Familiar with the bootup flow. Fixes problems when booting from Legacy BIOS or UEFI and maintains the installer's initrd (usually disk/raid/HBA/network) drivers. Show less

Focus on Ceph - core, performance tuning, deploy. Do some bug fixed, feature implementation and tuning performance.Familiar with Open Systems, Linux, OpenIndiana(OpenSolaris)Familiar with SCSI, SES, mpt driver, multi-path driver. Maintain the mptsas and multi-path driver on OpenIndiana.Design and implementing the event-trigger disk manage system. Getting the kernel space event and pass to user space to handling.Experience on performance benchmark by FIO, VDBench, IOMeter.

Tainan City, Taiwan

Experience on context-aware, ontology.Build an ontology base system and publish an ieee paper on WAINA 2012 which is related to previous ontology base system.

Master'S Degree, Electronic Engineering

Bachelor'S Degree, Computer Science