Dell DR4300 DR Series System Administrator Guide - Page 14

enclosures. Adding an expansion shelf provides additional data storage for the DR Series system and also requires a license. Each added expansion shelf enclosure must be equal to or greater than each DR Series system internal drive slot capacity (0-11). For more information, see the topic, "Expansion Unit Limits," in the Dell DR Series System Interoperability Guide and the related Expansion Shelf topics in this guide. Drive and Available Physical Capacities The internal system drive capacity and available physical capacities of the DR Series system vary, depending on the system type and the drives installed. For details, see the Dell DR Series System Interoperability Guide, which describes the internal system drive capacity and available physical capacity (in decimal and binary values) in the hardware DR Series systems. It also includes the available capacities per virtual machine operating system (OS) for the DR2000v. DR Series Data Storage Concepts The topics in this section present several key data storage terms and concepts that help you to better understand the role that the DR Series system plays in meeting your data storage needs. Data Deduplication and Compression The DR Series system design uses various data-reduction technologies, including advanced deduplication algorithms, in addition to the generic and custom compression solutions that prove effective across many differing file types. Data deduplication and compression is addressed in the following areas: • DR Series System - The DR Series system backup and recovery appliances provide both efficient and highperformance disk-based data protection to leverage the advanced deduplication and compression capabilities in the DR Series system software. The DR Series systems provide a key component that performs backup, recovery, and data protection operations. • Deduplication - This technology eliminates redundant copies of data and in the process it decreases disk capacity requirements and reduces the bandwidth needed for data transfer. Deduplication can be a major asset for companies that are dealing with increasing data volumes and require a means for optimizing their data protection. • Compression - This technology reduces the size of data that is stored, protected, and transmitted. Compression helps companies improve their backup and recovery times while helping reduce infrastructure and network resource constraints. In general, DR Series systems are disk-based data protection appliances that offer advanced deduplication and compression capabilities to reduce the time and cost associated with backing up and restoring data. Based on deduplication and compression technology, the DR Series systems eliminate the need to maintain multiple copies of the same data. This lets customers keep more data online longer and reduce the need for tape backup dependency. Using its deduplication and compression technology, DR Series systems can help achieve an expected data reduction ratio of 15:1. Achieving this reduction in data means that you need fewer incremental storage operations to run and it provides you with a smaller backup footprint. By removing redundant data, DR Series systems deliver fast reliable backup and restore functionality, reduce media usage and power and cooling requirements, and improve your overall data protection and retention costs. You can extend the benefits of data deduplication across the enterprise as well by using the DR Series system deduplication replication function-to provide a complete backup solution for multi-site environments. With 64:1 deduplicated replication (32:1 for DR4X00, 8:1 for DR2000v), up to 64 nodes can be replicated simultaneously to separate, individual containers on one node. The DR Series systems use compression with replication to shrink the data that is needed to be moved across the wire to a container. Replication can be scheduled based on your settings to occur during non-peak periods. The replication schedule you create can be set and prioritized to ingest data over replication data to ensure the most optimal back up windows based on your needs. Unlike NFS and CIFS containers, OST and RDS container replication is handled by the Data Management Applications (DMAs) media servers. 14