Messages in this thread | | | From | Nick Wang <> | Subject | [PATCH v3 0/1] Zeroout/discard devices instead of initial full sync | Date | Thu, 6 Aug 2015 18:04:21 +0800 |
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Patch set is based on drbd-8.4 3ae8af0b, may confilct with branch rs-discard-granularity of new feature flag, have already compiled/tested against SLES12.
Changes compare to v2: 1. two options for new-current-uuid --zeroout-devices and --discard-devices. 2. Create a new feature flag FF_DISCARD. 3. Mark optional for zeroout-devices and discard-devices. 4. Merge patch set into one patch.
Full sync for drbd initial usually take a long time, especically when network become the bottleneck of the syncing. Simply skip the full sync with "--clear-bitmap" may not the perfect solution for all the cases, like using the bare device(no filesystem) to work,etc database,vm... This patche set can be used to zero out devices locally instead of a full sync to make the 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. It will start zeroing out devices of both side.
Signed-off-by: Nick Wang <nwang@suse.com> CC: Philipp Reisner <philipp.reisner@linbit.com> CC: Lars Ellenberg <lars.ellenberg@linbit.com> CC: drbd-dev@lists.linbit.com CC: linux-kernel@vger.kernel.org
Nick Wang (1): drbd: Support zeroout device instead of initial full sync
drbd/drbd_int.h | 15 +++++++ drbd/drbd_main.c | 60 +++++++++++++++++++++++++++- drbd/drbd_nl.c | 41 +++++++++++++++++-- drbd/drbd_protocol.h | 2 + drbd/drbd_receiver.c | 86 +++++++++++++++++++++++++++++++++++++++- drbd/drbd_worker.c | 105 +++++++++++++++++++++++++++++++++++++++++++++++++ drbd/linux/drbd_genl.h | 2 + 7 files changed, 305 insertions(+), 6 deletions(-)
-- 2.1.4
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