DRBD-8.x

DRBD-8.3.15

• Bugfixes only, no new features
• Build fixes for Linux-3.7

DRBD-8.4.3

• Backport of the activity-log improvements (striping/non-blocking updates) from drbd-9
• Bugfixes and build fixes

DRBD-9

Drbd-9.0 is already available as prerelease, but not yet stable. Therefore drbd-9.0's features are still listed here on the ROADMAP.

DRBD-9.0

• More than two nodes in one level (i.e. without device stacking)
• Automatic promote
• Striped activity log and non blocking AL updates

DRBD-9.x

• Redundant connections between two nodes
• Support for request-relaying (remove the requirement for a full mesh)
• Support clusters where a partition has access to a shared disk
• Support for more than two primary nodes
• UDP multicast transport (instead of TCP connection mesh)
• Create new bitmap-slots online (online grow of backing storage is a pre condition)

Ideas, not yet planed for a specific release

• Never report false-positives with the data-integrity-alg checks.
• Use the crypto API in a way that we can utilize multiple CPU cores to do checksums
• Support DIF and DIX.
• Optionally deal with read errors in a way that the BBR (bad block relocation) of a drive can kick in
• move the cpu-mask from the syncer section to the host section, since it might be necessary to have that different on the systems.
• Offer an improved resync mode, that deals gracefully with thin provisioned storage. Currently a checksum based resync already has this property. The improvement will be a special mode, that just does not rewrite blocks containing only zeros.