Arctera InfoScale™ Operations Manager 9.0 Release Notes
- Overview of this release
- System requirements
- Software limitations
- Known issues
- Appendix A. Getting help
Online migration to encrypted volumes
The Volume Manager (VxVM) component of InfoScale lets you migrate unencrypted volumes at rest - which may or may not be part of a replicated volume group (RVG) - to encrypted ones. This feature allows existing volumes to be migrated without application downtime, that is, while the file system is mounted and while the I/Os are running. It also avoids complexities, like having to modify application configurations, and has a controlled impact on the application I/O performance.
The online migration operation involves mirroring the existing storage configured under a volume, which requires an equal amount of additional storage that gets used in the background.
Online migration involves the Start phase, in which the process is initiated, and the Commit phase, in which the background changes made to the volume are finalized. The unencrypted volume is migrated to an encrypted one when both these phases are completed successfully.
Limitations
Encryption of RAID 5 and erasure coded (EC) volumes on Linux hosts is not supported.
Only one online migration can be performed on an unencrypted volume at a time.
Only one top-level mirror plex can be migrated at a time.
After the Start phase is complete and before you can initiate the Commit phase, you can abort the migration or switch plexes. The switching of reads between the source (unencrypted) plex and the target (unencrypted) plex helps verify the data copied during the Start phase. Meanwhile, the writes continue to happen on both the plexes.
The Server perspective of the InfoScale Operations Manager is used to migrate unencrypted volumes to encrypted ones. For details, refer to the InfoScale Operations Manager User's Guide.
For details on the volume encryption feature and the related InfoScale commands, refer to the platform-specific Storage Foundation Administrator's Guide.