About

Host PowerTools allows to create snapshots and to perform other related operations on the host's mapped Active-Active volumes.

• The following section include information which is specific to snapshots management of Active-Active volumes.
• For more information about snapshot management through Host PowerTools see: Snapshots management.

Limitation

• Snapshots are created individually on each peer.
  
  • Snapshots cannot be replicated between the systems.
  • If both peers are synchronized (the Active-Active replica state of the peers is "Synchronized"), it is possible to snapshot both peers using one command.
    
    • Yet, it is not guaranteed that the created snapshots will be identical on the two peers. (a snapshots are individual to each peer)
• Snapshots can be created only on synchronized peers.
  • Means that the peer contains the latest data.
  • If a snapshot was requested on a peer that is not synchronized, the snapshot operation will fail. 

Creating a Snapshot 

The create snapshot command allows to state a specific system using the "–system" argument.

• Creating a snapshot on both peers is possible only if both peers are mapped to the host. 

Creating a snapshot on both peers

If a system was not specified when creating a snapshot on an Active-Active volume:

• Host PowerTools would try to create a snapshot on each peer that is mapped to the host. 

  • If both peers are mapped, but one of the peers is not synchronized - the command fails and no snapshot will be created. 

Creating a snapshot on a specific peer

If a system was specified, Host PowerTools would create a snapshot only on the specified peer.