test/store_test: fix deferred writing test cases

When bitmap allocator is in use different space fragmentation and
allocation strategy cause blob fragmentation. Which in turn impacts the
decision on deferred write applicability.

Fixing by using standalone DB volume to reduce main device space fragmentation.

Fixes: https://tracker.ceph.com/issues/63795
Signed-off-by: Igor Fedotov <igor.fedotov@croit.io>

diff --git a/src/test/objectstore/store_test.cc b/src/test/objectstore/store_test.cc
index 03dc1a87e1fc4f8eaf95f71826506d2788c37f21..8f85c1a4f1a281d52f988125aad9598bfdfc983d 100644 (file)
--- a/src/test/objectstore/store_test.cc
+++ b/src/test/objectstore/store_test.cc
@@ -8293,6 +8293,8 @@ TEST_P(StoreTestSpecificAUSize, DeferredOnBigOverwrite2) {
   }
 
   size_t block_size = 4096;
+  SetVal(g_conf(), "bluestore_block_db_create", "true");
+  SetVal(g_conf(), "bluestore_block_db_size", stringify(1 << 30).c_str());
   StartDeferred(block_size);
   SetVal(g_conf(), "bluestore_max_blob_size", "65536");
   SetVal(g_conf(), "bluestore_prefer_deferred_size", "65536");
@@ -8369,6 +8371,8 @@ TEST_P(StoreTestSpecificAUSize, DeferredOnBigOverwrite3) {
   }
 
   size_t block_size = 4096;
+  SetVal(g_conf(), "bluestore_block_db_create", "true");
+  SetVal(g_conf(), "bluestore_block_db_size", stringify(1 << 30).c_str());
   StartDeferred(block_size);
   SetVal(g_conf(), "bluestore_max_blob_size", "65536");
   SetVal(g_conf(), "bluestore_prefer_deferred_size", "65536");
@@ -8447,6 +8451,10 @@ TEST_P(StoreTestSpecificAUSize, DeferredDifferentChunks) {
   size_t alloc_size = 4096;
   size_t large_object_size = 1 * 1024 * 1024;
   size_t prefer_deferred_size = 65536;
+ 
+  SetVal(g_conf(), "bluestore_block_db_create", "true");
+  SetVal(g_conf(), "bluestore_block_db_size", stringify(1 << 30).c_str());
+
   StartDeferred(alloc_size);
   SetVal(g_conf(), "bluestore_max_blob_size", "131072");
   SetVal(g_conf(), "bluestore_prefer_deferred_size",