diff options
| author | Ravishankar N <ravishankar@redhat.com> | 2015-04-15 22:22:08 +0530 |
|---|---|---|
| committer | Vijay Bellur <vbellur@redhat.com> | 2015-05-05 00:06:34 -0700 |
| commit | 25e8e74eb7b81ccd114a9833371a3f72d284c48d (patch) | |
| tree | 0c82b2ad9133c55c74852ce65d027bc36ed6cac5 /xlators/cluster/afr/src/afr.h | |
| parent | 6d7428d2018c061ca2791443bd90980f9755ded3 (diff) | |
afr: add arbitration support
Add logic in afr to work in conjunction with the arbiter xlator when a
replica 3 arbiter volume is created. More specifically, this patch:
* Enables full locks for afr data transaction for such volumes.
* Removes the upfront marking of pending xattrs at the time of pre-op
and defer it to post-op. (This is an arbiter independent change and is made for all afr transactions.)
* After pre-op stage, check if we can proceed with the fop stage without
ending up in split-brain by examining the changelog xattrs.
* Unwinds the fop with failure if only one source was available at the
time of pre-op and the fop happened to fail on particular source brick.
* Skips data self-heal if arbiter brick is the only source available.
* Adds the arbiter-count option to the shd graph.
This patch is a part of the arbiter logic implementation for 3 way AFR
details of which can be found at http://review.gluster.org/#/c/9656/
Change-Id: I9603db9d04de5626eb2f4d8d959ef5b46113561d
BUG: 1199985
Signed-off-by: Ravishankar N <ravishankar@redhat.com>
Reviewed-on: http://review.gluster.org/10258
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Pranith Kumar Karampuri <pkarampu@redhat.com>
Diffstat (limited to 'xlators/cluster/afr/src/afr.h')
| -rw-r--r-- | xlators/cluster/afr/src/afr.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/xlators/cluster/afr/src/afr.h b/xlators/cluster/afr/src/afr.h index f7bc6ea0f94..6cb708ffbd7 100644 --- a/xlators/cluster/afr/src/afr.h +++ b/xlators/cluster/afr/src/afr.h @@ -39,6 +39,8 @@ #define AFR_DOM_COUNT_MAX 3 #define AFR_NUM_CHANGE_LOGS 3 /*data + metadata + entry*/ +#define ARBITER_BRICK_INDEX 2 + typedef int (*afr_lock_cbk_t) (call_frame_t *frame, xlator_t *this); typedef int (*afr_read_txn_wind_t) (call_frame_t *frame, xlator_t *this, int subvol); @@ -656,6 +658,10 @@ typedef struct _afr_local { unsigned char *pre_op; + /* For arbiter configuration only. */ + dict_t **pre_op_xdata; + unsigned char *pre_op_sources; + /* @fop_subvols: subvolumes on which FOP will be attempted */ unsigned char *fop_subvols; |