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authorJoseph Fernandes <josferna@redhat.com>2015-08-27 17:23:07 +0530
committerDan Lambright <dlambrig@redhat.com>2015-09-08 05:13:00 -0700
commit96af474045c9ba5ab74ca76daa823d91a0a0c610 (patch)
treeb9f8991807f1d5a41eee82ff69788161af815e72 /libglusterfs/src/gfdb/gfdb_sqlite3.h
parent9efce73fb31d520706a6d47de4daa4fb3366e6a6 (diff)
tier/ctr: Solving DB Lock issue due to write contention from db connections
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> Reviewed-by: Dan Lambright <dlambrig@redhat.com> Tested-by: Dan Lambright <dlambrig@redhat.com>
Diffstat (limited to 'libglusterfs/src/gfdb/gfdb_sqlite3.h')
-rw-r--r--libglusterfs/src/gfdb/gfdb_sqlite3.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/libglusterfs/src/gfdb/gfdb_sqlite3.h b/libglusterfs/src/gfdb/gfdb_sqlite3.h
index 213693136fe..7bcba5a54bd 100644
--- a/libglusterfs/src/gfdb/gfdb_sqlite3.h
+++ b/libglusterfs/src/gfdb/gfdb_sqlite3.h
@@ -279,6 +279,8 @@ int gf_sqlite3_find_recently_changed_files_freq (void *db_conn,
int read_freq_cnt,
gf_boolean_t clear_counters);
+int gf_sqlite3_clear_files_heat (void *db_conn);
+
void gf_sqlite3_fill_db_operations (gfdb_db_operations_t *gfdb_db_ops);
#endif