I have a large (2.2PB, ~6 Billion files) EC pool used by radosgw. It is still under very heavy use by users for reading and writing. However, I want to start using a new ceph pool and migrate all the data in this ceph pool to the new one.
Unfortunately, taking a downtime is not going to be an option as time sensitive data is actively stored and retrieved from this pool and the downtime would likely have to be days to migrate this much data.
Is there a way to migrate this pool without a significant downtime? The closest discussion I found is in this thread where they talk about setting up a new default pool but it doesn't have enough details for my skill level as to how to implement the solution.
Any instructions on how I could accomplish this migration would be appreciated.
OS Release: Ubuntu 20.04
Ceph Release: Octopus