diff options
| author | Joseph Fernandes <josferna@redhat.com> | 2015-09-11 09:36:06 -0400 |
|---|---|---|
| committer | Dan Lambright <dlambrig@redhat.com> | 2015-09-11 13:46:50 -0700 |
| commit | 1d02d4bd9b5f7d730ab08961c17ef58204c8e8fd (patch) | |
| tree | b37cf8fffe901013185e8011ea32b680640871d1 /libglusterfs/src/gfdb/gfdb_data_store.h | |
| parent | 46674c5d5caaa183f8ee99efb64ef268eded91ab (diff) | |
tier/ctr: Solving DB Lock issue due to write contention from db connections
This is a backport of 12031.
> Problem: The DB on the brick is been accessed by CTR, for write and
> tier migrator, for read and write. The write from tier migrator is reseting
> the heat counters after a cycle. Since we are using sqlite, two connections
> trying to write would cause a db lock contention. As a result CTR used to fail
> to update the db.
> Solution: Using the same db connection of CTR for reseting the heat counters.
> 1) Introducted a new IPC FOP for CTR
> 2) After the query do a ipc syncop to the underlying client xlator associated
> to the brick.
> 3) CTR in brick will catch the IPC FOP and cleat the heat counters.
> Change-Id: I53306bfc08dcdba479deb4ccc154896521336150
> BUG: 1260730
> Signed-off-by: Joseph Fernandes <josferna@redhat.com>
> Reviewed-on: http://review.gluster.org/12031
> Tested-by: NetBSD Build System <jenkins@build.gluster.org>
> Tested-by: Gluster Build System <jenkins@build.gluster.com>
Signed-off-by: Dan Lambright <dlambrig@redhat.com>
Conflicts:
xlators/cluster/dht/src/tier.c
Change-Id: I88aa289cdf21e216b42c3d8ccfb4e7e828b43772
BUG: 1262341
Reviewed-on: http://review.gluster.org/12161
Reviewed-by: Joseph Fernandes
Tested-by: NetBSD Build System <jenkins@build.gluster.org>
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Tested-by: Dan Lambright <dlambrig@redhat.com>
Diffstat (limited to 'libglusterfs/src/gfdb/gfdb_data_store.h')
| -rw-r--r-- | libglusterfs/src/gfdb/gfdb_data_store.h | 18 |
1 files changed, 17 insertions, 1 deletions
diff --git a/libglusterfs/src/gfdb/gfdb_data_store.h b/libglusterfs/src/gfdb/gfdb_data_store.h index 977794df5cb..2eb7edf1338 100644 --- a/libglusterfs/src/gfdb/gfdb_data_store.h +++ b/libglusterfs/src/gfdb/gfdb_data_store.h @@ -170,7 +170,8 @@ typedef int (*find_recently_changed_files_t) (gfdb_conn_node_t *_conn_node, gfdb_time_t *from_time); - +typedef const +char * (*get_db_path_t) (); /*Libgfdb API Function: Query records/files that have not changed/accessed * from a time in past to current time, with @@ -241,6 +242,19 @@ typedef int (*find_recently_changed_files_freq_t) (gfdb_conn_node_t *_conn_node, int read_freq_thresold, gf_boolean_t _clear_counters); + + +/*Libgfdb API Function: Clear the heat for all the files + * + * Arguments: + * _conn_node : GFDB Connection node + * + * Returns : if successful return 0 or + * -ve value in case of failure + **/ +int +clear_files_heat (gfdb_conn_node_t *_conn_node); + typedef struct gfdb_methods_s { init_db_t init_db; fini_db_t fini_db; @@ -249,10 +263,12 @@ typedef struct gfdb_methods_s { find_unchanged_for_time_freq_t find_unchanged_for_time_freq; find_recently_changed_files_freq_t find_recently_changed_files_freq; char *dbpath; + get_db_path_t get_db_path; } gfdb_methods_t; void get_gfdb_methods (gfdb_methods_t *methods); typedef void (*get_gfdb_methods_t) (gfdb_methods_t *methods); + #endif |