Murtadha,
When the utility is ready, could you post another note on where it lives
and how to use it and also what the best practice advice is on how to
back up before proceeding? Thx!
Cheers,
Mike
On 11/27/17 3:07 PM, Murtadha Hubail wrote:
Hi all,
Recently, a feature was added to AsterixDB to allow a dataset to be
rebalanced from a set of nodes (a node group) to another node group.
Rebalancing a dataset will result in redistributing the dataset’s data
to the nodes in the new node group. Since a single node may appear in
both the old and the new node group, a new level in the storage tree
had to be introduced to distinguish between the old and the new copies
of the dataset. To do that without breaking backward compatibility for
existing users who would like to upgrade binaries without having to
reload their existing data, we added a migration utility that will run
on the node startup and migrate the data to the new storage structure.
*_However, it is recommended that you backup your existing data to
avoid any permanent data loss in case of any unexpected failures
during the migration process_*_._
Cheers,
Murtadha
