Snapmirror:
- Snapmirror is a license product in Netapp.
- SnapMirror is for Disaster recovery and its Loss of region. – Disaster Recovery
- Using snapmirror data transfer one filer to another filer or in same filer.
- Snapmirror will work at Volume and Qtree level.
- Snapmirrror needs a source and destination filer.
- Snapmirror is used primarily for data redundancy
- Real time replication of data
- Maximum distance of up to 35km
- Fibre Channel or DWDM protocol
– Data migration
– Data replication
– Remote access and load sharing
Sync = data transfer continually
Async = data transfer in scheduled timing
Semi-sync = like Async
Requirements and Limitations for VSM
- Destination’s Data ONTAP® version must be equal to or more recent than the source
- Like-to-like transfers only: flex-to-flex
- Destination volume capacity should be equal or greater than source
- Quota cannot be enabled on destination volume
- TCP port range 10565–10569 must be open
Qtree SnapMirror (QSM)
- Logical replication
- Independent of the type of volume
- Source volume and qtree are online/writable
- Destination volume is online/writable
- Destination qtree is read-only
Requirements and Limitations for QSM
- Supports Async mode only
- Destination volume must have 5% extra space
- Destination qtree cannot be /etc name
- Cannot be initialized using a tape device
- Does not support cascading of mirrors
- Deep directory structure and large number of small files may impact performance
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