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Replication Configuration

The Replication Configuration page allows you to configure and manage replication targets and allowed replication sources on an InfiniGuard DDE. A source sends replicated data to 1 or 2 targets, and a target receives replicated data from up to 10 sources. An InfiniGuard DDE can act as both a source and a target.

Additional Information

  • For more information about data replication, or to perform data replication, see Replication.
  • If the InfiniGuard DDE is configured as a replication target and replication is performed across a public network, with the source and target located behind NAT-enabled routers, you must specify a NAT IP address for the InfiniGuard DDE on the Network page (see Configuring Interface IP Addresses).

To access the Replication Configuration page, click the Configuration menu, and then click the Replication tab.

Replication Configuration page

Tasks
Use the Replication Configuration page to perform the following tasks:

Target InfiniGuard DDE List

The Target InfiniGuard list displays the following information for each target InfiniGuard:

Target

The IP address of the target system that the InfiniGuard DDE is configured to send data to.

Status

The replication status of the InfiniGuard DDE. For a detailed description of all possible replication statuses, see Replication.

Source IP

The IP address that is used to uniquely identify the source InfiniGuard DDE to the target.

Original Data Size

The original, native size of data sent during replication or failback. This value does not represent the amount of data actually sent over the network during replication or failback because data is deduplicated and compressed before being sent.

Actual Data Sent

The amount of data actually sent over the network during replication or failback. This value is usually much less than the Original Data Size due to the benefits of data deduplication and compression.

Average Send Rate

The average send rate (in B/s) of data sent over the network during replication or failback (Actual Data Sent divided by the amount of time required to complete replication or failback).

You can customize the appearance of the Systems list in the following ways:

  • Click the top banner row of the list to collapse or expand the list.
  • Click the arrow to the right of a column heading and select Sort Ascending or Sort Descending to sort the rows in the table by that column.
  • To show or hide a column, click the arrow to the right of a column heading, and then click Columns. Select the check box to show a column, or clear the check box to hide a column.

Note

The statistics in the Target Systems list are for each target InfiniGuard DDE rather than a cumulative total for all targets as is displayed on the Home page.

Adding a Replication Target

Add a replication target to configure the InfiniGuard DDE to send replicated data to that target. You can add up to two targets. After you add a target, you can enable replication to that target for a NAS share or VTL partition. When replication is enabled for a share or partition, replicated data is sent to the target system during scheduled or manual replication.

Additional Information

  • Before you can add a replication target, you must add the InfiniGuard DDE to the list of allowed replication sources on the target InfiniGuard DDE (see Adding a Replication Source).
  • To add a new target when two targets are already configured, first delete one target (see Deleting a Replication Target). Then add the new target.
  • For more information about enabling and scheduling replication for a share or partition, see Replication Send.

To add a replication target:

  1. Under Target InfiniGuard DDE, click Add.

The Add Target Host window displays.

Add Target Host page

2. In the Target Hostname or IP box, enter the hostname or IP address of the system that will receive the replicated data.

Additional Information

  • When entering IP addresses, never use an address that is in a reserved IP address range. To see a list of reserved IP address ranges, click the quick tip icon [?] located near the IP address field.
  • To use hostname format, you must specify at least one DNS IP address on the Network page (see Network).

3. In the Source IP box, enter the IP address that is used to uniquely identify the source InfiniGuard DDE to the target. This may be different than the actual network IP address of the source DDE.

If the target system is at InfiniGuard DDE 2.1 Software or higher, the Source IP field is not required. If the target system is at InfiniGuard DDE 2.0.1.x Software or below, then you must enter the IP address by which the target system recognizes the source system. The default value is 0.0.0.0.

Additional Information

  • The Source IP field does not accept fully qualified domain names. You must enter a valid IP address. Make sure this IP address is configured in the allowable sources list on the target InfiniGuard DDE.
  • When configuring segmented network interfaces, if the source InfiniGuard DDE replication, data, and management interfaces are on the same subnet, you must add a host route on the source InfiniGuard DDE to make sure the replication interface is correctly selected when replicating data to the target InfiniGuard DDE (see Understanding Interface Routing).

4. Click Apply.

Note

The new target is not automatically added to existing replication schedules. You must add or edit scheduled events to schedule replication to the new target (see Scheduler).

Deleting a Replication Target

Delete a replication target if the InfiniGuard DDE no longer needs to send replicated data to that target. After the target system is deleted, the InfiniGuard DDE will no longer send replicated data to that system.
When a target is deleted:

  • All replication jobs to that target that are in progress or queued will transition to failed.
  • All replication job history for that combination of target and share or partition is removed.
  • All shares or partitions will be reconfigured to no longer replicate to that target.

To delete a replication target:

  1. Under Target Systems, select one or more targets to delete.
  2. Click Pause to pause replication to the target.
  3. Click Delete

Note

The deleted target is not automatically removed from existing replication schedules. You must edit scheduled events to remove the deleted target (see Scheduler).

Pausing or Resuming Replication to a Target

The source InfiniGuard DDE controls the replication pause behavior.

  • To pause replication, select a target under Target Systems and click Pause. The InfiniGuard DDE temporarily stops sending replicated data to the selected target.
  • To resume replication, select a target under Target Systems and click Resume. The InfiniGuard DDE resumes sending replicated data to the selected target.

Additional Information

  • If namespace replication is paused midway through a replication job, the job will fail
  • If namespace replication is paused before the replication job starts, the job will sit in the queue until replication is resumed. When resumed the job will start and replication will occur.
  • Trigger replication can be paused midway through a replication job. When resumed the job will continue from where it was paused.

Enabling System Throttling

Enable system throttling to limit the network bandwidth used for replication to all targets. When a constant throttle is enabled, the InfiniGuard DDE limits the amount of data it sends during source replication so that it does not exceed the specified bandwidth.

Additional Information

  • If multiple targets are configured, replication to all targets counts against the same bandwidth limit.
  • To vary the replication throttle rate over time, use the Configuration > Scheduler page (see Scheduler). Do not enable a constant throttle if a throttle schedule is configured. The scheduled replication throttling bandwidth settings take precedence over the constant throttle value. (The currently active replication throttle rate appears on the Home page under Current Activity.)

To enable system replication throttling:

  1. Under Target Systems, click the box next to Throttling.

The Replication Throttle window displays.

Replication Throttle page

2. Select the Enable system throttling check box or clear the check box to disable system throttling.

3. In the Throttle box, enter the maximum allowed bandwidth, and select the units you want to use to specify the constant throttle (KB/s or MB/s). The lowest value you can set is 32 KB/s. The highest value you can set is 125 MB/s for 1GbE and 500 MB/s for 10GbE.

4. Click Apply.

Caution

 Do not set the maximum allowed bandwidth to a value that is lower than necessary. If the maximum allowed bandwidth is set to the lowest value, large replication jobs may fail.

Source Systems List

The Source Systems list displays the following information for each source InfiniGuard DDE:

Source

The IP address of the source system that is allowed to send data to the InfiniGuard DDE.

Actual Data Received

The amount of data actually received over the network during replication or failback.

Average Receive Rate

The average receive rate (in MB/s) of data received over the network during replication or failback (Actual Data Received divided by the amount of time required to complete replication or failback).

You can customize the appearance of the Source Systems list in the following ways:

  • Click the top banner row of the list to collapse or expand the list.
  • Click the arrow to the right of a column heading and select Sort Ascending or Sort Descending to sort the rows in the table by that column.
  • To show or hide a column, click the arrow to the right of a column heading, and then click Columns. Select the check box to show a column, or clear the check box to hide a column.

Note

The statistics in the Source Systems list are for each source InfiniGuard DDE rather than a cumulative total for all sources as is displayed on the Home page.

Adding a Replication Source

Add a system to the list of replication sources to allow it to send replicated data to the InfiniGuard DEE. You must add a source system to the list of allowed replication sources on the target InfiniGuard DDE before you configure the source InfiniGuard DDE to send replicated data to the target. The InfiniGuard DDE can receive replicated data from up to 10 sources.

Additional Information

  • For more information about working with received snapshots, see Replication Receive - NAS or Replication Receive - VTL.
  • It is typical for the target InfiniGuard DDE to require additional disk space for replication data compared to the source InfiniGuard DDE. This is because complete replication data is sent to the target before old data is deleted. For optimal performance, if the InfiniGuard DDE is a replication target, Infinidat recommends keeping the amount of free space at 20% or more (see Dedup Engine allocated capacity).

To add a replication source:

  1. Under Source Systems, click Add.

The Add Allowed Source window displays.

Add Allowed Source page


2. In the Source Hostname or IP box, enter the hostname or IP address of the system that will send the replicated data to the InfiniGuard DDE.

Note

To use hostname format, you must specify at least one DNS IP address on the Network page (see Network).

3. Click Apply.

Deleting a Replication Source

Delete a system from the list of replication sources if it will no longer send replicated data to the DDE. After the source system is deleted, the DDE will no longer accept replicated data from that system.

To delete a replication source:

  1. Under Source Systems, select one or more sources to delete.
  2. Click Delete.

Note

If a source InfiniGuard DDE is deleted from the list, its contribution to the cumulative totals on the Home page are not removed until you clear Receive statistics (see Replication Performance).

Changing the Maximum Number of Snapshots

During scheduled or manual data replication, the InfiniGuard DDE receives a snapshot from the source system. A snapshot contains all of the data necessary to fully recover or failback a NAS share or VTL partition to the point in time when the snapshot was saved.

The InfiniGuard DDE can retain up to 32 snapshots for each replicated share or partition. Once the maximum number of snapshots have been saved, the oldest snapshot is deleted to make room for each new snapshot that is received.

To change the maximum number of received snapshots:

  • Under Source Systems, in the Maximum Snapshots drop-down box, select the number of snapshots to retain for each replicated share or partition.
  • The default value is 10. The maximum value is 32.

Note

Retaining more than the default number of snapshots will use additional disk space on the target InfiniGuard DDE. This can cause the target DDE to fill up more quickly.

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