《11.数据保护在线备份和恢复学习名词解释》由会员分享，可在线阅读，更多相关《11.数据保护在线备份和恢复学习名词解释（6页珍藏版）》请在金锄头文库上搜索。
1、GlossaryACL Access Control List. A list that contains the users or groups access rights to each share.active file system A file system excluding its Snapshot copies.aggregate A manageable unit of RAID-protected storage, consisting of one or two plexes, that can contain one traditional volume or mult
2、iple FlexVol volumes.blocking factor The number of tape blocks that are transferred in each write operation.CIFS Common Internet File System. A protocol for networking PCs.console A terminal that is attached to a filers serial port and is used to monitor and manage filer operation.DNS Domain Naming
3、Service. An Internet service for finding IP addresses.dump path A path that specifies one volume, qtree, or subtree to back up.file mark Data on a tape that signals a boundary of a tape file.HTTP HyperText Transfer Protocol. An Internet Web transfer protocol.increment chain A series of incremental b
4、ackups of the same path.inode A data structure containing information about files on a filer and in a UNIX file system.local tape device A program-based functionality associated with a tape drive that is directly attached to a filer that is performing a tape operation.MD5 Message Digest 5. A checksu
5、m algorithm described in RFC (Request For Comments) 1321, a proposal for an Internet standard.mirror A volume that contains a read-only copy of data in the active file system of another volume, usually on another filer.NDMP Network Data Management Protocol. A protocol that allows Network Appliance f
6、ilers to communicate with backup applications, and provides capabilities for controlling the robotics of multiple tape backup devices.NFS Network File System. A protocol for networking UNIX-based computers.NIS Network Information Service, formerly called Yellow Pages. An administrative database for
7、networks.NVFAIL Software that warns you of compromised database validity and automatically renames the database so that it does not restart automatically.NVRAM Nonvolatile RAM in the filer, used for logging incoming write data and NFS requests. Improves system performance and prevents loss of data i
8、n case of a filer or power failure.Open Systems platform A non-filer system, such as a server running Solaris, HP-UX, Windows NT, or Windows 2000, whose data can be backed up to a SnapVault secondary storage system.Open Systems SnapVault agent A software module that can be installed on a non-filer s
9、ystem and enables that system to back up its data to a SnapVault secondary storage system.plex A physical copy of a file system. An unmirrored volume has one plex; a mirrored volume has two identical plexes.primary storage system A system whose data is to be backed up by SnapVault.quota A limit plac
10、ed on a file system that restricts disk space usage by files with a given User ID (UID) or group ID (GID).qtree A special subdirectory of the root of a volume that acts as a virtual subvolume with special attributes.RAID Redundant Array of Independent Disks. A technique that protects against disk fa
11、ilure by computing parity information based on the contents of all the disks in the array. NetApp filers use RAID Level 4, which stores all parity information on a single disk.Remote Shell A program that enables a user on one system to execute a program on another system. Remote Shell connections ar
12、e usually not interactive.remote tape device A program-based functionality associated with a tape drive that is not directly attached to a filer that is performing a tape operation.ROD Restore-On-Demand. ROD is a background data-recovery method that provides access to client-requested data while a f
13、ull volume restoration is in progress. root volume The volume that contains information that controls the entire filer, usually in the /etc/rc file.secondary storage system A filer or NearStore system to which data is backed up by SnapVault.share A directory or directory structure on the filer that
14、has been made available to network users and can be mapped to a drive letter on a CIFS client.SnapMirror Software that performs automated file system replication of a volume onto the same or a separate disk or filer.SnapRestore Software that restores an entire volume to the state recorded in a previ
15、ously taken Snapshot copy. Snapshot copy An online, read-only copy of the entire file system that protects against accidental deletions or modifications of files without duplicating file contents. Snapshot copies enable users to restore files and enable administrators to back up the filer to tape wh
16、ile the filer is in use.Snapshot reserve The portion of a volumes disk space that is reserved for Snapshot copies.source filer The filer from which you are replicating data.subtree A directory in a volume or qtree. tape block 1,024 bytes of data.tape device A specific functionality of a physical tape drive that you create by specifying information in the tape device name when you install a tape drive or tape stacker.tape file Data on a tape delimited by file marks.tape li
