NetWorker 19.7 Snapshot Management Integration Guide

Restoring from a snapshot with the Recovery Wizard

You can use the NetWorker Management Console (NMC) Recovery Wizard to restore file system data from a snapshot that is stored on a supported storage array.

1. Run NMC, and in the Enterprise view, select the NetWorker server name, and then select Enterprise > Launch Application.
2. In the NetWorker server’s Recover view, select Recover > New Recover.
   The Recovery Wizard appears.
3. On the Select the Recovery Type page, select the Recovery Type, and then click Next.
   Complete the Select the Recovery Hosts page:
   1. In the Source Host field, specify the application host for the production data that was the source for the snapshot you want to restore.
   2. In the Destination Host field, specify the application host or an alternative NetWorker client on which you want to restore the snapshot data.
      NetWorker now allows you to perform an array level restore (rollback) of a snapshot to an alternate set of devices. Pre-select the device and the devices should be of same size or larger than the original source devices. The devices should be visible to an alternate host. Create the same File systems that were on original source devices. The file systems should be mounted at time of rollback on the alternate host. NSM will unmount the file systems and perform the rollback to these devices and mount them back after the rollback.

      On the NMC, when the destination host is not source host, the system automatically rolls back the Smart snapshot to any LUN in the "NsrSnapSourceSG" storage group.

      NOTE NetWorker uses the following criteria to match devices on the target host with the source devices for VMAXv3 SnapVX rollback to alternate host:

      • The device should be of equal or greater size.
      • The device should have no clone or BCV relationships.
      • The total no of source LUNs should match the total number of target LUNs.
   3. In the Available Recovery Types table, you can either select Filesystem, SmartSnap, or another supported NetWorker application type that is installed on the client.
      The SmartSnap option allows you to specify array LUNs World Wide Names (WWNs).
   4. Click Next.
4. Complete the Select a Snapshot page. You can restore the entire snapshot or you can select the individual directories and individual files from the snapshot:
   1. The Snapshots table lists the snapshots on the storage array that are available to the source client. Select the snapshot to restore from, based on the snapshot time and save set volumes.
   2. Select one of the following types of restores to perform:
      • Recover save sets
      • Rollback snapshot

      NOTE For SmartSnap, only the Rollback snapshot restore type is supported. If the LUN is a part of a mounted file system or active volume group, you should manually unmount and export it before recovery.
   3. If you selected the Recover save sets option, specify the following settings:
      • In the Select save set field, select a single save set volume to mount and restore from. The next wizard page will let you browse the directories and files in the mounted save set.
        NOTE You can select only one save set for this operation. Each additional save set requires a separate pass through the wizard.
      • In the Mount save set on field, select the host on which to mount the save set, ready for the restore operation. The mount host can be one of the following:
        • Destination client that you selected earlier in the wizard.
        • An existing storage node that you can select from the drop-down list.
        NOTE If you use a storage node as the mount host, ensure that the storage node has access to the storage array. For example, you can specify the storage node as the mount host in the properties of the source client, on the APPS and MODULES tab, in the NSR_DATA_MOVER Application Information attribute.
        NOTE Veritas Volume Manager does not support the configuration of production file systems and snapshot file systems that are mounted on the same host. The mount host cannot be the application host.

        Figure 1 shows an example of the data flow in a restore operation where the NetWorker storage node is the snapshot mount host.

      • In the Recover mode field, select whether you want to recover individual items from the save set or the full save set:
        • If you select Browse and recover save set, when you click Next, the wizard mounts the snapshot volume for the save set and displays the Select Data to Recover page. The mount operation can take some time.
        • If you select Recover full save set, when you click Next, the wizard displays the Select the Recovery Options page.
   4. If you selected Rollback snapshot, a warning is displayed: A rollback is a destructive operation. When you click Next, the wizard displays the Perform the Recovery page.

      A rollback restores the entire snapshot to the destination client that you selected in the Snapshots table.

      Restoring a snapshot by rollback provides details.

   5. Click Next. The result depends on the recover or rollback selections.
   6. You can select Advanced options, and then specify Debug level and other recover options.
5. If you selected the Browse and recover save set option, complete the Select Data to Recover page, otherwise, skip this step.
   1. Specify the location of the items to restore by using the browse tree or typing the full path of the location. Indicate the directories or files for NSM to restore by marking them in the table.
      NOTE The wizard does not list expired save sets. You can restore existing expired save sets manually by using the nsrsnapadmin command utility with the R command option or the nsrsnap_recover command. Using nsrsnapadmin for NSM operations and the NetWorker Command Reference Guide provide details.
   2. Click Next.
6. If you selected any of the Recover save sets options, complete the Select the Recovery Options page. If you selected the rollback option, skip this step.
   1. In the File Path for Recovery field, select, browse, or type a location where NSM restores the files:
      • Original path
      • New destination path

      NOTE You cannot repeat the same restore operation to the same destination.
   2. In the Duplicate file options field, specify how NSM resolves file name conflicts:
      • Rename the restored file—NSM restores the file with a new name that NSM automatically generates.
      • Do not recover the file—NSM will not restore the file.
      • Overwrite the existing file—NSM replaces the file with the same name.
   3. To specify further options, select Advanced Options, and then specify the attributes.
   4. Click Next.
7. Complete the Perform the Recovery page:
   1. In the Recovery Name field, type a name for the recovery.
   2. In the Recovery Start Time field, specify the following attributes:
      • Start recovery now is the only option that NSM supports.
      • In Specify a hard stop time, you can specify a time limit that stops an incomplete restore process.
   3. In the Recovery Resource Persistence field, select the retain or delete option for this recovery resource:
      • Persist this resource until deleted by user.
      • Automatically remove this resource based on jobs database retention.
   4. Review the Summary of the restore and make any necessary corrections by going to the previous pages in the wizard.
   5. Click Run Recover.