Cherry-pick Titan changes to tikv-3.0 (#345)

Cherry-pick recent Titan changes included in https://github.com/pingcap/titan/pull/89Signed-off-by: Yi Wu <yiwu@pingcap.com>

librocksdb_sys/crocksdb/c.cc

@@ -5145,9 +5145,9 @@ void ctitandb_options_set_max_background_gc(ctitandb_options_t* options,
   options->rep.max_background_gc = size;
 }
 
-void ctitandb_options_set_purge_obsolete_files_period(ctitandb_options_t* options,
-                                                      unsigned int period) {
-  options->rep.purge_obsolete_files_period = period;
+void ctitandb_options_set_purge_obsolete_files_period_sec(
+    ctitandb_options_t* options, unsigned int period) {
+  options->rep.purge_obsolete_files_period_sec = period;
 }
 
 void ctitandb_options_set_blob_cache(ctitandb_options_t* options,

librocksdb_sys/crocksdb/crocksdb/c.h

@@ -2051,7 +2051,8 @@ ctitandb_options_set_merge_small_file_threshold(ctitandb_options_t* options,
 extern C_ROCKSDB_LIBRARY_API void ctitandb_options_set_max_background_gc(
     ctitandb_options_t* options, int32_t size);
 
-extern C_ROCKSDB_LIBRARY_API void ctitandb_options_set_purge_obsolete_files_period(
+extern C_ROCKSDB_LIBRARY_API void
+ctitandb_options_set_purge_obsolete_files_period_sec(
     ctitandb_options_t* options, unsigned int period);
 
 extern C_ROCKSDB_LIBRARY_API void ctitandb_options_set_blob_cache(

titan @ ab0743ce

-Subproject commit 19ea115af9866a465a90b902f504dcf4ccf09d1f
+Subproject commit ab0743ce31a7ada30cf785c6761374788811aedd

librocksdb_sys/src/lib.rs

@@ -1883,7 +1883,7 @@ extern "C" {
 
     pub fn ctitandb_options_set_disable_background_gc(opts: *mut DBTitanDBOptions, disable: bool);
     pub fn ctitandb_options_set_max_background_gc(opts: *mut DBTitanDBOptions, size: i32);
-    pub fn ctitandb_options_set_purge_obsolete_files_period(
+    pub fn ctitandb_options_set_purge_obsolete_files_period_sec(
         opts: *mut DBTitanDBOptions,
         period: usize,
     );

src/titan.rs

@@ -72,7 +72,7 @@ impl TitanDBOptions {
 
     pub fn set_purge_obsolete_files_period(&mut self, period: usize) {
         unsafe {
-            crocksdb_ffi::ctitandb_options_set_purge_obsolete_files_period(self.inner, period);
+            crocksdb_ffi::ctitandb_options_set_purge_obsolete_files_period_sec(self.inner, period);
         }
     }