XFS—高性能的企业级文件系统.pdf

Insert Picture Here XFS – The High Performance Enterprise File System Jeff Liu Agenda  About XFS  Design  Journal  Self-describing metadata  Performance ➏ Whats new in progress 2 General information ▸ Created by SGI in 1993, ported to Linux since 2001 ▸ Full 64-bit journaling file system, the best choice for 16TB storage ▸ Extent based and delayed allocation ▸ Maximum file system size/file size: 16 EiB/8EiB ▸ Variable blocks sizes: 512 bytes to 64 KB ▸ Freeze/Thaw to support volume level snapshot - xfs_freeze ▸ Online file system/file defragmentation - xfs_fsr ▸ Online file system resize – xfs_growfs ▸ User/Group/Project disk quota support ▸ Dumping and Restoring – xfsdump/xfsrestore 3 Linux distributions support ▸ Available on more than 15 Linux distributions ▸ SuSE has include XFS support since SLES8 ▸ Will be the default file system on RHEL7 ▸ Premier support on Oracle Linux 6 ▸ Ceph OSD daemons recommend XFS as the underlying file system for production deployment 4 The number of files changed, insertions and deletions C 1 1 2 2 3 3 4 4 5 o 5 0 5 0 5 0 5 0 5 0 m 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0