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The following table provides definitions for some of the terms that are used in this document:
Term | Definition | |
Agent | An agent is a software module that is installed on a client computer to protect a specific type of data. Different agent software is available to manage different datatypes on a client, such as Windows file-system data or Oracle databases. Agent software can be installed in physical, virtual, and clustered environments, and it may be installed either on the computer or on a proxy server. In addition, a Virtual Server Agent may be used for hypervisor support. | |
Auxiliary copy | The auxiliary copy operation creates additional standby copies of data. These standby copies are referred to as secondary copies. You can use different media and different libraries for the primary and secondary copies. | |
Client | A client is a logical grouping of the software agents that facilitate the protection, management, and movement of data associated with the client. | |
Cloud storage library | The cloud storage library enables configuring and using online cloud storage devices such as Dell ECS as a storage target. | |
The CommCell Console is the central management user interface for managing the CommCell group, monitoring and controlling active jobs, and viewing events related to all activities. The CommCell Console allows centralized and decentralized organizations to manage all data-movement activities through a single, common interface. | ||
CommCell group | A CommCell group is the logical grouping of all CommCell software components, including MediaAgent and client software. This group protects, moves, stores, and manages the movement of data and information. | |
CommServe | The CommServe host is the central management component of the CommCell group. It coordinates and runs all CommCell group operations, maintaining Microsoft SQL Server databases that contain all configuration, security, and operational history for the CommCell group. A CommCell group can have only one CommServe host. The CommServe software can be installed in physical, virtual, and clustered environments but only on a Microsoft Windows host. Commvault supports high availability by replicating data to a standby CommServe host. | |
Load balancer | The Dell Atmos, S3, and OpenStack cloud storage libraries all expect a single ECS hostname or IP address. The best practice for distribution of REST traffic among the ECS nodes requires an external IP load balancer. For information about several approaches for configuring a load balancer with ECS, see the ECS Best Practices Guide. Note: The CAS protocol supports native load balancing, so the Centera Access Node address resolves directly to a single ECS node, so do not use an external IP load balancer with CAS. | |
MediaAgent is the data-transmission manager in the CommCell group. It provides high-performance data movement and manages the storage libraries. The CommServe server coordinates MediaAgent tasks. For scalability, a CommCell can have more than one MediaAgent. The MediaAgent software can be installed in physical, virtual, and clustered environments. A MediaAgent can be installed on a Windows or UNIX host. | ||
Storage policy | Storage policies act as a channel for backup and restore operations. They map data from its original location to physical media. A policy can be used for either data protection and archiving or disaster recovery. Retention and deduplication properties can also be defined here. | |
Subclient | Subclients are logical containers that define the specific production data (virtual machines, drives, folders, files, databases, mailboxes) to be protected on a client. | |