Glossary - HP StorageWorks 8000 - NAS User Manual

glossary

AutoRAID tm – Combination of RAID Levels 0, 1 and 5DP implemented by the firmware of the VA 7xxx
controller to provide automatic data protection on VA 7xxx hard drives.
CIFS/SMB – (Common Internet File System / Server Message Block). Protocols used to access non-local
storage over a network. Primarily used by Windows based systems.
Consistent Backup –A backup taken after the database has been shutdown and no changes are taking
place to any database files. Does not require the Redo logs to perform a recovery. Also called Cold
Backup.
DSS Database – Decision Support System database. Characterized by complicated, CPU intensive queries.
File Volume – Basic unit of logical storage. Volume Group storage is allocated for user access by creating
one or more file volumes on a single volume group. Roughly equivalent to a file system.
Heterogeneous File Access – Storage (Directories / files) that is accessible from either Windows or Unix®
Operating Systems.
Hot Spare – A portion of the array capacity reserved to perform a rebuild of a failed disk. Ensures that the
array can maintain data redundancy if one or two disks fail. Reserved space is used to increase array
performance until it is needed.
Inconsistent Backup – A backup taken while the database is still active and processing transactions.
Requires the Redo logs to successfully complete a restore. Also called a hot backup.
LUN - (Logical Unit Number) - The logical aggregation of the space on one or more physical hard drives.
LUNs are unique numbers that enable the controller to differentiate between different groupings of
storage. A LUN corresponds to a logical device on the NAS 8000.
NFS – Network File System. A method of accessing non-local storage over a network. Primarily used by
Unix operating systems.
OFA – Optimal Flexible Architecture. A set of guidelines specified by Oracle to facilitate easier
management of Oracle software and databases. Refers primarily to a directory structure imposed upon
Oracle installations and database implementations.
OLTP Database – On-Line Transaction Processing database. Characterized by many, small, usually
straightforward transactions.
RAID – Redundant Array of Inexpensive/Intelligent Disks
RAID 0/1 – Data Striping and data mirroring.
RAID 5DP – Dual Parity information is added to data to provide high level of fault tolerance.
Redundancy Group – Group of physical disks containing redundant data, as defined by the RAID level
assigned to the data.
SetUID bit – Permission bit in Unix file systems that causes the Unix command shell to execute the file with
the SetUID bit set, as the owner of the file rather than as the user who invoked the execution.
Snapshot – A read only picture of a file volume at a specific point in time.
Trusted Host – Unix host whose 'root' user is not remapped to user 'nobody' when accessing NAS 8000
exports.
Volume Group – Logical storage that combines the space from one or more LUNs and makes that space
accessible for defining user accessible storage.
Virtualization – Treatment of physical disks as a "pool of storage" rather than individual disks.
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