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QoreStor 5.1.0 - User Guide

Introducing the QoreStor documentation Introducing QoreStor Setting up your QoreStor system Configuring QoreStor settings Managing storage groups Managing containers Managing replications Managing Users Managing QoreStor Remotely Monitoring the QoreStor system Configuring and using Rapid NFS and Rapid CIFS Configuring and using VTL Configuring and Using Encryption at Rest Support, maintenance, and troubleshooting About us

Guidelines and prerequisites for replication

Refer to the following important notes and guidelines for understanding and using replication in QoreStor.

  • TCP Port Configuration—If you plan to perform replication operations across a firewall, the replication service requires that the following fixed TCP ports be configured to support replication operations:
    • port 9904
    • port 9911
    • port 9915
    • port 9916
  • DMAs and Domain Relationships — To allow replication storage information to be viewed by a corresponding data management application (DMA), the target QoreStor system must reside in the same domain as the source QoreStor system in the replication relationship.
  • Replication Limits — Refer to the QoreStor Interoperability Guide for details about the supported system limits for replication. For a definition of connections and streams, see Streams_vs_Connections.
  • Version Checking — The QoreStor software includes version checking that limits replication only between other QoreStor systems that run the same system software version. If versions are incompatible, the administrator will be notified by an event, and replication will not continue.
  • Storage Capacity and Number of Source Systems — Be aware that the storage capacity of the target QoreStor system is directly affected by the number of source systems writing to its containers, and also by the amount being written by each of these source systems.
  • Bandwidth limiting — Refer to the replication command in the QoreStor Command Line Reference Guide for information regarding limiting bandwidth consumption for replication.
  • MTU Setting — Primary and secondary replication targets should have the same network maximum transmission unit (MTU) setting.

Replication seeding

QoreStor supports replication seeding, which provides the ability to create a local seed and place it in a remote system. The seed backup is a process on the source QoreStor system, which collects all of the unique data chunks from the containers and stores them on the target device. This is helpful if you have a new replication target to set up, the amount of data to be replicated is very large, and the network bandwidth is low.

You can seed the target replica with the source data saved on a third party device, for example, a CIFS-mounted share, attach it to the target QoreStor and then get the data into the target QoreStor. Once the seeding is complete, replication is enabled between source and target and replication re-synchronization is done to complete any pending data transfers. Thereby, continuous replication can be done, which reduces network traffic significantly, and data can be replicated and synced with the target in a short amount of time.

NOTE: The following scenarios are not supported for seeding:

  • Import AND export from one share/device cannot occur at the same time.
  • Import from one share/device cannot be completed from multiple locations at the same time.
  • Export to a mount point can be completed only from one seed job. Multiple seed export jobs cannot send data to a single mount point.

You can initiate seeding using the QoreStor command line interface (CLI), and the data to be seeded is gathered in an organized manner and stored in the target devices. Refer to the QoreStor Command Line Reference Guide for more information about replication seeding support.

Viewing replication information

In the QoreStor GUI, the Replication page displays current information about replication relationships for data containers in your QoreStor system.

To view replication information

  1. In the navigation menu, click Replication. The list of configured replications is displayed, including the following information:

    • Source—The name of the source container (with IP address or hostname)
    • Status—The status of the source container.
    • Replica—The name of the target container in the replication process (with IP address or hostname)
    • State—The state of the replica container.
    • Average Throughput— the average replication throughput in KiB/s
    • Dedupe Network Savings— the estimate reduction in data replicated achieved through QoreStor deduplication.

  2. To view the following detailed replication information about the source and target, click a selected replication in the list to expand it. The information below is displayed:
    • Role— Whether the current QoreStor serves as the source or target for the replication.
    • Replication Source Container
    • Replication Target Container
    • Replication Target System
    • Peer Status—Displayed as Online, Offline, Paused, or Disconnected. When replication is started, the Peer Status displays the status as Online for the selected container. When stopped, the Peer Status initially displays the status as Paused, and then changes to Offline.
    • Replication State—The current peer status as In sync, Paused, or Replicating.
    • Schedule Status
    • Replication Average Throughput
    • Replication Maximum Throughput
    • Network Average Throughput
    • Network Maximum Throughput
    • Network Bytes Sent
    • Pending Bytes
    • Dedupe Network Savings
    • Compression Network Savings
    • Last INSYNC Time—The last time the system synchronization occurred.
    • Estimated Time to Sync

    NOTE: These statistics refresh every 30 seconds.

Adding replication relationships

To add a new replication relationship, complete the following steps.

  1. In the navigation menu, click Replication.
  2. In the upper right corner of the page, click Add Replication.
  3. To define the Source Container, select the Local or Remote option.
    • If you select Local, select the local container from the drop-down list.
    • If you select Remote, configure the following settings:
      • Username—enter the username for the remote system.
      • Password—enter the password for the remote system.
      • Remote System—enter the domain name of the remote system.
      • Click Retrieve Remote Containers.
      • Select Remote Container—Select the remote container from the drop-down list.
  4. For Encryption, select one of the following encryption options to encrypt the data as it is replicated: Not Enabled, AES 128–bit, or AES 256–bit.
  5. Under Replica Container, define the target replica container by configuring the following settings.
    • Username—enter the username for the remote system.

      NOTE: The credentials used need to be either the admin or administrator account.

    • Password—enter the password for the remote system.
    • Remote Machine—enter the domain name of the remote system.
    • Click Retrieve Remote Containers.
    • Select Remote Container—Select the remote container from the drop-down list.
  6. Click Next.
  7. Review the summary and click Finish.

NOTE: For information about starting and stopping replication, see the topic, Starting and stopping replication. For information about scheduling system operations such as replication, see Understanding system operation scheduling.

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