Alternate client backup split mirror examples
The alternate client has access to the mirror disks that contains a snapshot of the primary client's data. Before the backup, the mirror is split from the primary disk, which creates the snapshot on the mirror disk. The alternate client has access to the mirror disk, from which it creates and streams a snapshot-based backup image to the media server. After the backup, the mirror can be optionally resynchronized with the primary disk.
Note:
The mirror disk need not be visible to the primary client, only to the alternate client.
Figure: Alternate client and split mirror: primary client and alternate client share data through mirroring.
The figure shows the following phases:
Phase | Action |
|---|---|
Phase 1 | Mirror disk is synchronized with primary. |
Phase 2 | Primary client collaborates with the alternate client to create the snapshot. Primary client splits the mirror disk from primary disk, and mounts the snapshot on the alternate client. |
Phase 3 | Alternate client streams the snapshot-based backup from the mirror to the media server. |
Phase 4 | Media server reads the backup image from the alternate client. |
Figure: Alternate client and media server on same host shows the media server and alternate client on the same host.
The figure shows the following phases:
Phase | Action |
|---|---|
Phase 1 | Mirror disk is synchronized with primary. |
Phase 2 | Primary client collaborates with the alternate client to create the snapshot. Primary client splits the mirror disk from primary disk, and mounts the snapshot on the alternate client. |
Phase 3 | Media server (serving as alternate client) reads the snapshot-based backup from the mirror. |
A single alternate client can handle backups for a number of primary clients, as shown in the following diagram.
Multiple clients can share an alternate backup client of the same operating system type.
Note:
All clients must be of the same OS.
