- All new data ingested is stored using the new default compression (gzfast) by leveraging the hardware assisted compression.
- All data previously ingested and stored using the previous default compression (lz) will be uncompressed using CPU during restore.
- All data previously compressed by lz will be converted to gzfast during the regularly scheduled cleaning cycle as part of the space reclamation process. The conversion of all the data compressed in lz will require multiple regular cleaning cycles before it is fully converted. Aggressive scheduling of cleaning cycles will not expedite the conversion as reclamation may not occur.
- All data tiered using the previous default compression will remain in that format until space is reclaimed in the cloud. No conversion will occur for the data in the cloud.
Note: Controller upgrade is not supported with the DD6400 appliance model due to the presence of data disks in the controller. Customers wanting to migrate data to or from a DD6400 can use the replication-based migration option.