ctr/libgfdb: Performance enhancer for unlink/create/rename/link fops

1) ctr_link_consistency option for ctr xaltor is provided so that
   the user can choose to switch it on or off.
   /* For link consistency we do a double update i.e mark the link
   * during the wind and during the unwind we update/delete the link.
   * This has a performance hit. We give a choice here whether we need
   * link consistency to be spoton or not using link_consistency flag.
   * This will have only one link update */

2) In delete the wind time recording is moved to unwind path.
   /* Special performance case:
   * Updating wind time in unwind for delete. This is done here
   * as in the wind path we will not know whether its the last
   * link or not. For a last link there is not use to update any
   * wind or unwind time!*/

>   http://review.gluster.org/#/c/10170/
>   Cherry picked from commit 606d9734543208542afcf9df982bf2d560235ef6
>   Change-Id: I209472fb816f939db4a868b97ba053b028f17ea6
>   BUG: 1217786
>   Signed-off-by: Joseph Fernandes <josferna@redhat.com>
>   Reviewed-on: http://review.gluster.org/10170
>   Reviewed-by: Dan Lambright <dlambrig@redhat.com>
>   Tested-by: Gluster Build System <jenkins@build.gluster.com>
>   Signed-off-by: Joseph Fernandes <josferna@redhat.com>

Change-Id: I4a89ef80875f36cff91520f712e1f47fde258a63
BUG: 1219066
Signed-off-by: Joseph Fernandes <josferna@redhat.com>
Reviewed-on: http://review.gluster.org/10170
Reviewed-by: Dan Lambright <dlambrig@redhat.com>
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Signed-off-by: Joseph Fernandes <josferna@redhat.com>
Reviewed-on: http://review.gluster.org/10614
Tested-by: NetBSD Build System
Reviewed-by: Vijay Bellur <vbellur@redhat.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/xlators/features/changetimerecorder/src/ctr-helper.h b/xlators/features/changetimerecorder/src/ctr-helper.h
index 6f4ad5cbe7a..85ee872fa33 100644
--- a/xlators/features/changetimerecorder/src/ctr-helper.h
+++ b/xlators/features/changetimerecorder/src/ctr-helper.h
@@ -37,6 +37,7 @@ typedef struct gf_ctr_private {
         gf_boolean_t                    ctr_record_wind;
         gf_boolean_t                    ctr_record_unwind;
         gf_boolean_t                    ctr_record_counter;
+        gf_boolean_t                    ctr_link_consistency;
         gfdb_db_type_t                  gfdb_db_type;
         gfdb_sync_type_t                gfdb_sync_type;
         gfdb_conn_node_t                *_db_conn;
@@ -380,6 +381,7 @@ ctr_insert_wind (call_frame_t                    *frame,
                                 "WIND: Error filling  ctr local");
                         goto out;
                 }
+
                 /*Insert the db record*/
                 ret = insert_record (_priv->_db_conn,
                                         &ctr_local->gfdb_db_record);