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Rapid Recovery 6.0.2 - User Guide

*** Legend Introduction to Dell Data Protection | Rapid Recovery Understanding the Rapid Recovery Core Console Working with repositories Managing Rapid Recovery Core settings Using custom groups Working with encryption keys Protecting machines using the Rapid Recovery Core Working with Microsoft Exchange and SQL Servers Protecting server clusters Exporting protected data to virtual machines Managing protected machines Understanding replication Managing events Generating and viewing reports Restoring data Understanding bare metal restore for Windows machines Retention and archiving Managing cloud accounts Working with Linux machines Understanding the Local Mount Utility Central Management Console Understanding the Rapid Recovery Command Line Management utility Understanding the Rapid Recovery PowerShell module
Prerequisites for using PowerShell Working with commands and cmdlets Rapid Recovery PowerShell module cmdlets Localization Qualifiers
Extending Rapid Recovery jobs using scripting Rapid Recovery APIs Glossary

Deduplication in Rapid Recovery

Deduplication is a data compression technique that reduces both storage requirements and network load. The process involves physically storing unique blocks of data only once on disk. In Rapid Recovery, when any unique data block occurs a second time within a repository, instead of storing the data again, a virtual reference to the data is stored.

Deduplication occurs in backup snapshots captured by Rapid Recovery Core. Backup information is deduplicated within a single repository. It cannot be deduplicated across multiple repositories.

Rapid Recovery release 6.0.2 uses target-based deduplication for all DVM repositories. In this model, information is transferred to the DVM repository (the target), and is then deduplicated from the repository.

For the most part, deduplication takes place inline (during the transfer of backup information).

For maximum gains, Rapid Recovery now also offers deduplication that occurs as post-processing. Post-processing is sometimes called pass-through deduplication. Using this model, data in the repository are compared to references in the DVM data cache. If a block of data in the repository has already been saved, then each additional occurrence of that data is replaced with a pointer or reference to the data.

This post-processing can save space on your repository storage volume, particularly if the deduplication cache was filled and then the cache was subsequently increased to take advantage of additional deduplication. This type of deduplication takes place when performing a repository optimization job. This feature is unique to DVM repositories, and is also called duplicate block reclamation.

For more information about the repository optimization job, see About the Repository Optimization Job. For more information on performing this task, see Optimizing a DVM repository.

Thus, Rapid Recovery takes advantage of all types of deduplication described here: target-based deduplication, inline deduplication, and post-processing deduplication.

For more information on where the references to unique blocks are stored for DVM repositories, see Understanding deduplication cache and storage locations.


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Managing a DVM repository

Before you can use Rapid Recovery, you need to set up one or more repositories on the Rapid Recovery Core. A repository stores your protected data; more specifically, it stores the snapshots that are captured from the protected machines in your environment.

Managing a DVM repository involves the following operations:

  1. Creating a DVM repository. Before creating a repository, consider the appropriate technology type.

    For information about repositories, see Understanding repositories.

    For information about creating a DVM repository, see Creating a DVM repository.

  2. Adding a new storage location. For more information on adding a new storage location to a DVM repository, see Adding a storage location to an existing DVM repository.
  3. Modifying repository settings. For more information about modifying repository settings for a repository, see Viewing or modifying repository details
  4. Checking a repository. For more information about checking a DVM repository, see Checking a repository.
  5. Performing a repository optimization job. For more information about the repository optimization job, see About the Repository Optimization Job. For steps to optimize an existing DVM repository, see Optimizing a DVM repository.
  6. Deleting a repository. For more information about deleting a repository, see Deleting a repository.

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Creating a DVM repository

This process describes how to create a repository on your Core using the Deduplication Volume Manager (DVM) repository technology.

  • You must have administrative access to the machine on which you want to create a DVM repository.
  • This repository type requires a minimum of 150GB of storage space available on the volume you define as the storage location.
  • The storage location for a DVM repository must be on a local drive attached to the Core server.
  • The Core server can be any DL series appliance (including the DL1000) or can be any software-based Windows server meeting system requirements.

Complete the following steps to create a DVM repository.

  1. Navigate to the Rapid Recovery Core Console.
  2. On the icon bar, click [More] (More), and then select Repositories.

    The Repositories page appears.

    On the Repositories page, the DVM Repositories pane appears.

  3. At the top of the page, click Add New DVM Repository.
    The Add New Repository dialog box appears.
  4. Enter the information as described in the following table.
    Table 1. Add New Repository settings
    Text Box Description
    Repository Name Enter the display name of the repository.

    By default, this text box consists of the word Repository and a number, which corresponds to the number of repositories for this Core. For example, if this is the first repository, the default name is Repository 1. Change the name as needed.

    Repository names must contain between 1 and 40 alphanumeric characters, including spaces. Do not use prohibited characters or prohibited phrases.

    Concurrent Operations Define the number of concurrent requests you want the repository to support. By default the value is 64.
    Comments Optionally, enter a descriptive note about this repository. You can enter up to 254 characters. For example, type DVM Repository 2.
  5. Click Add Storage Location to define the specific storage location or volume for the repository. This volume should be a primary storage location.
    CAUTION:
    Define a dedicated folder within the root for the storage location for your repository. Do not specify the root location. For example, use E:\Repository\, not E:\. If the repository that you are creating in this step is later removed, all files at the storage location of your repository are deleted. If you define your storage location at the root, all other files in the volume (e.g., E:\) are deleted, which could result in catastrophic data loss.

    The Add Storage Location dialog box appears.

  6. Click Add Storage Location to define the specific storage location or volume for the repository. This volume should be a primary storage location.
  7. In the Storage Location area, specify how to add the file for the storage location. You can choose to add a locally attached storage volume (such as direct attached storage, a storage area network, or network attached storage). You could also specify a storage volume on a Common Internet File System (CIFS) shared location.
    • Select Add file on local disk to specify a local machine, and then enter the information as described in the following table.
      Table 2. Local disk settings
      Text Box Description
      Data path Enter the location for storing the protected data.

      For example, type X:\Repository\Data.

      When specifying the path, use only alphanumeric characters, the hyphen, and the period (only to separate host names and domains). You can use the backslash character only to define levels in the path. Do not use spaces. No other symbols or punctuation characters are permitted.

      Metadata path Enter the location for storing the protected metadata.

      For example, type X:\Repository\Metadata.

      When specifying the path, use only alphanumeric characters, the hyphen, and the period (only to separate host names and domains). You can use the backslash character only to define levels in the path. Do not use spaces. No other symbols or punctuation characters are permitted.

    • Or, select Add file on CIFS share to specify a network share location, and then enter the information as described in the following table.
      Table 3. CIFS share credentials
      Text Box Description
      UNC path Enter the path for the network share location.

      If this location is at the root, define a dedicated folder name (for example, Repository).

      The path must begin with \\. When specifying the path, use only alphanumeric characters, the hyphen, and the period (only to separate host names and domains). The letters a to z are case-insensitive. Do not use spaces. No other symbols or punctuation characters are permitted.

      User name Specify a user name for accessing the network share location.
      Password Specify a password for accessing the network share location.
  8. In the Storage Configuration area, click More Details and enter the details for the storage location as described in the following table.
    Table 4. Storage configuration details
    Text Box Description
    Size Set the size or capacity for the storage location. The minimum size is 1 GB. The default is 250 GB. You can choose from the following:
    • GB
    • TB
      Note: The size that you specify cannot exceed the size of the volume.

      If the storage location is a New Technology File System (NTFS) volume using Windows XP or Windows 7, the file size limit is 16 TB.

      If the storage location is a NTFS volume using Windows 8, 8.1, Windows 10, or Windows Server 2012, 2012 R2, the file size limit is 256 TB.

      Note: For Rapid Recovery to validate the operating system, Windows Management Instrumentation (WMI) must be installed on the intended storage location.
    Write caching policy The write caching policy controls how the Windows Cache Manager is used in the repository and helps to tune the repository for optimal performance on different configurations.

    Set the value to one of the following:

    • On
    • Off
    • Sync

      If set to On, which is the default, Windows controls the caching. This is appropriate for Windows 10, and for versions of Windows Server 2012 and later.

      Note: Setting the write caching policy to On could result in faster performance. If you are using Windows Server 2008 SP2 or Windows Server 2008 R2 SP2, the recommended setting is Off.

      If set to Off, Rapid Recovery controls the caching.

      If set to Sync, Windows controls the caching as well as the synchronous input/output.

    Bytes per sector Specify the number of bytes you want each sector to include. The default value is 512.
    Average bytes per record Specify the average number of bytes per record. The default value is 8192.
  9. Click Save.
    The Add Storage Location dialog box closes and your settings are saved. The Add New Repository dialog box shows your new storage location.
  10. Optionally, repeat Step 6 through Step 9 to add additional storage locations for the repository.
  11. When all of the storage locations you want to create for the repository at this time have been defined, in the Add New Repository dialog box, click Create.

    The Add New Repository dialog box closes, and your changes are applied. The Repositories page appears, showing your newly added repository in the DVM Repositories summary table.


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Viewing or modifying repository details

  1. Navigate to the Rapid Recovery Core Console.
  2. On the icon bar, click [More] (More), and then select Repositories.

    The Repositories page appears.

    The DVM Repositories pane appears.

  3. From the Repositories page menu, you can perform the following general actions:
    Option Description
    Add New DVM Repository Add a new DVM repository.
    Open Existing DVM Repository Open an existing DVM repository from another Core, which changes ownership of the repository to this Core.

    For more information, see Opening an existing repository.

    Refresh View or refresh the list of repositories.
  4. In the DVM Repositories pane, from the [Actions] drop-down menu for any DVM repository, you can perform the following additional actions:
    Option Description
    Add Storage Location Extend the existing repository by adding a storage location
    Note: When extending a DVM repository volume, first pause protection. Then extend the volume, and finally, resume protection. This action prevents a rare error that can occur only when extending a volume simultaneous with a specific transfer phase.
    Check Perform a repository check
    Settings View or modify repository settings. These settings include:
    • Viewing the repository name
    • Viewing or changing the maximum concurrent operations
    • Viewing or changing a description for the repository
    • Enabling or disabling deduplication
    • Enabling or disabling compression for data stored in the repository
    Perform Optimization Job Perform a repository optimization job
    Delete Delete a repository
    Note: When extending a DVM repository volume, first pause protection. Then extend the volume, and finally, resume protection. This action prevents a rare error that can occur when extending at a specific transfer phase.

You can perform the following general actions from the Repositories page:

  • View or refresh the list of repositories
  • Add a new repository
  • Open an existing repository from another Core, which changes ownership to this repository

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