Re: Snapshot backup on ODA - VM Snapshot or ACFS Snapshot - Which is faster and easier

Posted by ErmanArslansOracleBlog on Jun 17, 2018; 7:25pm
URL: http://erman-arslan-s-oracle-forum.124.s1.nabble.com/Snapshot-backup-on-ODA-VM-Snapshot-or-ACFS-Snapshot-Which-is-faster-and-easier-tp6180p6194.html

Ok. Let's try to answer your questions one by one.

*ACFS based snapshot replication is based on rlogs. (no archivelogs or cdc) It is rlogs..
ACFS replication is always asynchronous (rlogs are transported once the current set contains a sufficient amount of changes)

*ACFS based replication is a little tricky. It is not supported unless you have replicated ACFS volume exported as HA-NFS.

*VM level snapshot contains your vdisks.. So it contains pretty much everything. (I mean -> VM Guest copy leveraging on snapshot feature).. This should not take a lot of time. It must be quick.. But you need to test it. It is based on snapshot technique.. So the size of the data shouldn't have a big effect on the duration.
High level steps for this is documented->

- Stop the local application guest VM
- Take a guest VM snapshot "oakcli clone {vm <vm_name> | vdisk <vdisk_name>} -snap"
- Start the local application guest VM
- Copy the local guest VM virtual disks from the snapshot above to the remote site