[PATCH 00/10] Zero out devices instead of initial full sync

[Nick Wang]

Full sync for drbd initial usually take a long time, especically
when network become the bottleneck the syncing. Simply skip the
full sync with "--clear-bitmap" may not the perfect solution
for all the cases. So this patches can be used to zero out 
devices locally instead of a full sync,two make consistent block 
device. This approach can be useful when lack of network bandwidth 
to sync.

The patches add one new option "--zap-devices" to "new-current-uuid" 
to zero out devices. Besides the change of drbd, also need to modify 
drbd-utils for the flag.

All patches are compiled/tested against SLES12.

Signed-off-by: Nick Wang <nwang@xxxxxxxx>
CC: Philipp Reisner <philipp.reisner@xxxxxxxxxx>
CC: Lars Ellenberg <lars.ellenberg@xxxxxxxxxx>
CC: drbd-dev@xxxxxxxxxxxxxxxx
CC: linux-kernel@xxxxxxxxxxxxxxx

 drbd/drbd_int.h        |  9 +++++
 drbd/drbd_main.c       | 42 ++++++++++++++++++++-
 drbd/drbd_nl.c         | 42 ++++++++++++++++++++-
 drbd/drbd_protocol.h   |  1 +
 drbd/drbd_receiver.c   | 99 ++++++++++++++++++++++++++++++++++++++++++++++++++
 drbd/linux/drbd_genl.h |  1 +
 6 files changed, 191 insertions(+), 3 deletions(-)

-- 
1.8.4.5

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