Dell™ PowerVault™ DL Backup-to-Disk Appliance Powered by CommVault Remote Office Backup Strategy CommVault DL Team Dell │ CommVault delltechcenter.com commvault.
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Dell PowerVault DL2000 Remote Office Backup Strategy Table of Contents Dell™ PowerVault™ DL2000......................................................................................................................... i Executive Summary ...................................................................................................................................... 2 Introduction ............................................................................................................................
Dell PowerVault DL2000 Remote Office Backup Strategy Executive Summary The Remote Office Backup Solution (SDR) is designed to seamlessly replicate data from remote office DL2000 media agents—which are ideal systems for disaster tolerance and recovery protection—to a centralized data center, where data is stored on magnetic media for ready access.
Dell PowerVault DL2000 Remote Office Backup Strategy deletes (orphan handling) based on changes that have occurred on the source since the last DDR operation. This sequence is currently triggered by a timed update service running on the DL2000 media agent that causes files in the Disk Library data path to be replicated to the destination file area. This model is referred to as “discrete” replication, since the files are replicated at fixed discrete intervals.
Dell PowerVault DL2000 Remote Office Backup Strategy purposes, such as creating additional copies of data, remote restore, tape vaulting (with or without encryption), content indexing, and enterprise search. Data on the primary mount path of the replicated disk library continues to be available for local recovery operations. Use Cases Not Addressed by DDR DDR does not replace any existing CommVault functionality or address some other specific use cases.
Dell PowerVault DL2000 Remote Office Backup Strategy FIGURE 1: REMOTE SINGLE INSTANCE BACKUP USING THE REPLICATED DISK LIBRARY Note that the SIDB itself is not replicated; only the single-instanced data path content is replicated. The SIDB is required for checking the uniqueness of an object only when writing it to the first mount path. The SIDB is not required when reading the object for recovery; hence, there is no need to replicate the SIDB to provide read access from the replicate dataset.
Dell PowerVault DL2000 Remote Office Backup Strategy Configure the Magnetic Library on Replicated Disks Step-by-step instructions are available in Books Online at http://documentation.commvault.com/commvault/release_7_0_0/books_online_1/english_us/featu res/magnetic_library/replicated_mag_lib_config.htm. IMPORTANT: Always check the Enable replication option, as shown in Figure 2, to automatically create a DDR replication pair.
Dell PowerVault DL2000 Remote Office Backup Strategy FIGURE 3: SDDR REPLICATION PAIR The state of the replication pair is initially Stopped. When the media agent initiates the DDR process, the state changes to Replicating, and then returns to Stopped once the two mount paths are synched. Storage Policy Create a new Storage Policy and a Storage Policy Copy, and point them to the Replicated Disk Library. Enable Single Instancing on the Storage Policy Copy.
Dell PowerVault DL2000 Remote Office Backup Strategy FIGURE 4: MEDIA MANAGEMENT PARAMETER FOR DDR REPLICATION INTERVAL Other Considerations OutofBand Initialization It is possible to perform the initial sync using the Out-of-Band Sync process as described in the online documentation available at: http://documentation.commvault.com/commvault/release_7_0_0/books_online_1/english_us/prod_info/flr.
Dell PowerVault DL2000 Remote Office Backup Strategy 3. Disable DDR replication using the registry key. 4. Perform the Out-of-Band Sync process. 5. Enable DDR replication using the registry key. The next DDR operation will continue to sync from that point onward. FanIn Configuration It is possible to have multiple remote nodes replicating to the same target server in the data center. To accomplish this, a separate replicated disk library per pair is required.
