GlusterFS
学习笔记
石家庄众毅信息技术有限公司
2017年01月 张文超
目录
在此处插入索引和目录
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第1章 Terminologies
Terminologies美 [.t?rm?'nɑl?d?i]术语;术语学;名词学
1.1 Access Control Lists
Access Control Lists (ACLs) allows you to assign different permissions for different users or groups even though they do not correspond to the original owner or the owning group.
访问列表(ACLs)允许你指定为不同的用户和组分配不同的权限,即使它们不
对应于原始所有者或所属的组。
correspond美 [.k?r?'spɑnd]v.通信;符合;相当于;相一致
1.2 Brick
Brick is the basic unit of storage, represented by an export directory on a server in the trusted storage pool.Brick美 [br?k] n.砖;砖块;积木;可靠的朋友v. and adj.
Brick是存储的基本单元,表现为服务器上可信存储池的导出目录。
建议您不要将系统的根分区用于存储后端
1.3 Cluster
A cluster is a group of linked computers, working together closely thus in many respects forming a single computer.
集群是一组彼此互联的计算机组,紧密协同工作表现的就像就像单台计算机一样。
1.4 Distributed File System
A file system that allows multiple clients to concurrently access data over a computer network
允许多客户端通过网络并发访问的文件系统。
1.5 Extended Attributes
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Extended file attributes (abbreviated xattr) is a filesystem feature that enables users/programs to associate files/dirs with metadata.
扩展属性是文件系统的一个特性,允许用户或应用为文件和目录关联更多的元数据信息。
1.6 FUSE
Filesystem in Userspace (FUSE) is a loadable kernel module for Unix-like computer operating systems that lets non-privileged users create their own file systems without editing kernel code. This is achieved by running file system code in user space while the FUSE module provides only a \to the actual kernel interfaces.
在用户空间的文件系统(FUSE)是一个用于类Unix操作系统的可加载的内核模块以允许非特权用户在不适用内核代码的情况下创建自己的文件系统,实现了在用户空间运行文件系统代码,FUSE模式实际上仅仅对内核接口提供了一个桥接。
1.7 GFID
Each file/directory on a GlusterFS volume has a unique 128-bit number associated with it called the GFID. This is analogous to inode in a regular filesystem.
每个GlusterFS中的文件或目录都有一个128bit的数字标识,称为GFID。
1.8 glusterd
Gluster management daemon that needs to run on all servers in the trusted storage pool.
Gluster管理守护进程需要运行在所有的提供受信存储池的服务器上。
1.9 Geo-Replication
Geo-replication provides a continuous, asynchronous, and incremental replication service from site to another over Local Area Networks (LANs), Wide Area Network (WANs), and across the Internet.
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异地备份为站点通过局域网/广域网/互联网提供了一个连续的,异步的、和增量复制服务。
1.10 Metadata
Metadata is defined as data providing information about one or more other pieces of data. There is no special metadata storage concept in GlusterFS. The metadata is stored with the file data itself.
元数据定义为关于数据的数据描述信息。在GlusterFS没有专用的元数据存储内容。元数据在文件数据中自包含。
1.11 Namespace
Namespace is an abstract container or environment created to hold a logical grouping of unique identifiers or symbols. Each Gluster volume exposes a single namespace as a POSIX mount point that contains every file in the cluster.
名字空间是被创建的一个抽象容器或环境用来保存逻辑群组或唯一标识符号。
1.12 Non Uniform File Allocation
Non Uniform File Allocation转换器的设计意图是提高本地磁盘的访问性能,可以应用于分布式和镜像式存储卷中。该转换器会力图优先在本地brick中落盘,再通过网络写入其它brick。启用NUFA功能需要满足几个条件: 1) 每个存储主机节点上只提供一个brick;
2) 需要使用FUSE客户端,且NUFA不支持NFSA或SMB;
3) 一个客户机如果要挂接启用了NUFA 功能的存储卷,那么这个客户机本身必须在可信存储池内;
启用NUFA的命令是:
# gluster volume set VOLNAME cluster.nufa enable on
1.13 Quorum 法定人数
The configuration of quorum in a trusted storage pool determines the number of server failures that the trusted storage pool can sustain. If an additional failure occurs, the trusted storage pool becomes unavailable.
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