Data Backup Glossary (Letter O)

Object-based storage device
Data Backup Glossary (Letter O)An object-based storage device (OSD) is a device that implements the standard in which data is organized and accessed as objects, where object means an ordered set of bytes (within the OSD) that is associated with a unique identifier. Objects are allocated and placed on the media by the OSD logical unit. With an OSD interface, metadata is associated directly with each data object and can be carried between layers and across storage device files. Records are no longer abstractions, but actual storage objects that are understood, managed, and secured at the device level.

Offline storage
Any storage medium that must be inserted into a storage drive by a person before it can be accessed by the computer system is considered to be a type of offline storage. Also called removable storage.

Online data storage
Also called Internet storage or hosted storage, online data storage is a data storage management solution that enables individuals or organizations to store their data on the Internet using a service provider, rather than storing the data locally on a physical disk, such as a hard drive or tape backup.

Open document management API
Open document management API (ODMA) is an open industry standard that enables desktop applications to interface with a document management system (DMS). ODMA simplifies cross-platform and cross-application file communication by standardizing access to document management through an API. ODMA allows multiple applications to access the same DMS without the need for a hard-coded link between the application and the DMS.

Operational data store
A type of database that serves as an interim area for a data warehouse in order to store time-sensitive operational data that can be accessed quickly and efficiently. In contrast to a data warehouse, which contains large amounts of static data, an operational data store contains small amounts of information that is updated through the course of business transactions. An operational data store will perform numerous quick and simple queries on small amounts of data, such as acquiring an account balance or finding the status of a customer order, whereas a data warehouse will perform complex queries on large amounts of data. An operational data store contains only current operational data while a data warehouse contains both current and historical data.

To record or copy new data over existing data, as in when a file or directory is updated. Data that is overwritten cannot be retrieved.
(n.) Refers to a file or directory that has been overwritten.