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NetVault Plug-in for MySQL 12.0 - User Guide

Introducing NetVault Backup Plug-in for MySQL Installing and removing the plug-in Configuring the plug-in Backing up data Restoring data Working with native MySQL replication Using the plug-in in a Failover Cluster environment Troubleshooting

Recovering to an alternate MySQL Server

Similar to the plug-in’s ability to restore databases or individual tables to a different MySQL Instance on the same MySQL Server, you can target a different MySQL Server during the restore process. This option is used during disaster recovery operations.

Figure 2. Example of data path for this form of relocation restore

To accomplish this process, perform the steps outlined in the following topics.

Known limitations and intended uses

Before conducting a relocation restore to a different MySQL Server, review this list of known limitations and intended uses for this operation.

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Valid restore sequences can include Full, Incremental, Differential, and Individual Database/Table Copy Only backups.
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Only restored Binary Logs from an Incremental or Differential Backup can be applied to the destination instance, that is, current Binary Logs from the source instance cannot be applied to the destination MySQL Instance.
Software installation and configuration prerequisites

The following prerequisites must be met before a restore of this type can be set up and run.

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Existing and target machines must have the same Installation configurations: Both machines must have the following established, regarding MySQL:
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Same OS installed
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Same version of MySQL installed
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Same installation and base directory
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Same MySQL “Data” directory
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NetVault Backup software and Plug‑in for MySQL installed on all clients: NetVault Backup, Client or Server version, and the plug-in must be installed and configured on both machines in use for this process, that is, the existing MySQL machine and the new restore target.
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All Client machines added to the NetVault Backup Server: With all software installation requirements met, the target NetVault Backup Client machines must be added to the NetVault Backup Server through the NetVault Backup WebUI, that is, the existing MySQL machine and the new restore target.
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Instance of MySQL must exist on the new restore target: The relocation process requires that an instance of MySQL exists on the new restore target. This instance serves as the target of the relocation restore. This instance must be properly set up and configured in MySQL, and you must add it to the plug-in on the new restore target — follow the steps outlined in Configuring the plug-in.
 
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IMPORTANT: Note the following values in the instance’s Configure dialog box on the new restore target: Username, Password, and Instance Name.

During setup of a relocation restore, the plug-in requires that you enter these values on the Options tab to gain proper access to the targeted MySQL Instance.

Running the restore

With the prerequisites met, perform the following steps to restore a MySQL backup to a different machine.

1
In the Navigation pane, click Create Restore Job.
2
On the Create Restore Job — Choose Saveset page, select Plug‑in for MySQL from the Plugin Type list.
3
To filter the items displayed in the saveset table further, use the Client, Date, and Job ID lists.
The table displays the saveset name (job title and saveset ID), creation date and time, and size. By default, the list is sorted by creation date.
4
In the saveset table, select the applicable item.
When you select a saveset, the following details are displayed in the Saveset Information area: Job ID, Job Title, server name, client name, plug-in name, saveset date and time, retirement setting, Incremental Backup or not, Archive or not, saveset size, and snapshot-based backup or not.
5
Click Next.
6
On the Create Selection Set page, select the data that you want to restore.
Display the individual MySQL Instance that was the target of the backup, navigate the selection tree until the applicable data items are located, and select them for inclusion.
7
With the applicable databases selected, click Edit Plugin Options, and then click the Restore Destination tab.
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In the Restore Destination Details section, enter the following:
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Username: Enter the user name established for the target instance on the new restore target, that is, what was set up in the Username field of the Configure dialog box.
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Password: Enter the password established for the target instance on the new restore target.
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Instance Name: Enter the NetVault Backup name established for the target instance of MySQL on the new restore target.
9
If applicable, select the applicable options on the Point-in-Time Recovery tab.
These options are not required to perform this form of restore. For more information, see Setting restore options.
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To save the settings, click Ok, and then click Next.
11
In Job Name, specify a name for the job if you do not want to use the default setting.
Assign a descriptive name that lets you easily identify the job when monitoring its progress. The job name can contain alphanumeric and nonalphanumeric characters, but it cannot contain non-Latin characters. On Linux, the name can have a maximum of 200 characters. On Windows, there is no length restriction. However, a maximum of 40 characters is recommended on all platforms.
 
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IMPORTANT: Do not use special characters that are not supported in a filename on the target OS. For example, the characters /,\,*, and @ should not be used on Windows. This requirement is because Plug‑in for MySQL tries to create a folder with the same name as the job title for restoring data temporarily.
12
In the Target Client list, select the machine on which you want to restore the data.
 
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TIP: You can also click Choose, and then locate and select the applicable client in the Choose the Target Client dialog box.
13
Use the Schedule, Source Options, and Advanced Options lists to configure any additional required options.
14
Click Save or Save & Submit, whichever is applicable.
You can monitor progress on the Job Status page and view the logs on the View Logs page. For more information, see the Quest NetVault Backup Administrator’s Guide.

Working with native MySQL replication

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Using the plug-in in a native environment: an overview
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Enabling replication support
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Backing up replication servers
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Restoring replication servers

Using the plug-in in a native environment: an overview

When you are using replication, all updates to the tables that are replicated should be performed on the master server. Otherwise, you must avoid conflicts between updates that users make to tables on the master and updates that they make to tables on the slave.

Replication offers benefits for robustness, speed, and system administration:

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Robustness is increased with a master and slave setup. If problems occur with the master, you can switch to the slave as a backup.
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You can improve response time for clients by splitting the load for processing client queries between the master and slave servers. SELECT queries may be sent to the slave to reduce the query-processing load of the master. Statements that modify data should still be sent to the master so that the master and slave do not get out of synchrony. This load-balancing strategy is effective if nonupdating queries dominate, which is the normal case.
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An extra benefit of using replication is that you can perform database backups using a slave server without disturbing the master. The master continues to process updates while the backup is being made.

Plug‑in for MySQL supports backup and recovery of single-master replication environments.

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