diff --git a/lib/iscsi/conn.c b/lib/iscsi/conn.c
index 3f2ba83af..229d1521e 100644
--- a/lib/iscsi/conn.c
+++ b/lib/iscsi/conn.c
@@ -976,7 +976,7 @@ _iscsi_conn_abort_queued_datain_task(struct spdk_iscsi_conn *conn,
 	struct spdk_iscsi_task *subtask;
 	uint32_t remaining_size;
 
-	if (conn->data_in_cnt >= MAX_LARGE_DATAIN_PER_CONNECTION) {
+	if (conn->data_in_cnt >= g_iscsi.MaxLargeDataInPerConnection) {
 		return -1;
 	}
 
@@ -1048,7 +1048,7 @@ iscsi_conn_handle_queued_datain_tasks(struct spdk_iscsi_conn *conn)
 	struct spdk_iscsi_task *task;
 
 	while (!TAILQ_EMPTY(&conn->queued_datain_tasks) &&
-	       conn->data_in_cnt < MAX_LARGE_DATAIN_PER_CONNECTION) {
+	       conn->data_in_cnt < g_iscsi.MaxLargeDataInPerConnection) {
 		task = TAILQ_FIRST(&conn->queued_datain_tasks);
 		assert(task->current_datain_offset <= task->scsi.transfer_len);
 		if (task->current_datain_offset < task->scsi.transfer_len) {
diff --git a/lib/iscsi/iscsi.h b/lib/iscsi/iscsi.h
index b1747e4ab..a8c096db6 100644
--- a/lib/iscsi/iscsi.h
+++ b/lib/iscsi/iscsi.h
@@ -91,11 +91,11 @@
 #define MAX_DATA_OUT_PER_CONNECTION 16
 
 /*
- * Defines maximum number of data in buffers each connection can have in
+ * Defines default maximum number of data in buffers each connection can have in
  *  use at any given time. So this limit does not affect I/O smaller than
  *  SPDK_BDEV_SMALL_BUF_MAX_SIZE.
  */
-#define MAX_LARGE_DATAIN_PER_CONNECTION 64
+#define DEFAULT_MAX_LARGE_DATAIN_PER_CONNECTION 64
 
 #define SPDK_ISCSI_MAX_BURST_LENGTH	\
 		(SPDK_ISCSI_MAX_RECV_DATA_SEGMENT_LENGTH * MAX_DATA_OUT_PER_CONNECTION)
@@ -351,6 +351,7 @@ struct spdk_iscsi_globals {
 	bool ImmediateData;
 	uint32_t ErrorRecoveryLevel;
 	bool AllowDuplicateIsid;
+	uint32_t MaxLargeDataInPerConnection;
 
 	struct spdk_mempool *pdu_pool;
 	struct spdk_mempool *pdu_immediate_data_pool;
diff --git a/lib/iscsi/iscsi_subsystem.c b/lib/iscsi/iscsi_subsystem.c
index 1eb766233..dfc2a7884 100644
--- a/lib/iscsi/iscsi_subsystem.c
+++ b/lib/iscsi/iscsi_subsystem.c
@@ -139,7 +139,7 @@ mobj_ctor(struct spdk_mempool *mp, __attribute__((unused)) void *arg,
 			  ~ISCSI_DATA_BUFFER_MASK);
 }
 
-#define NUM_PDU_PER_CONNECTION(iscsi)	(2 * (iscsi->MaxQueueDepth + MAX_LARGE_DATAIN_PER_CONNECTION + 8))
+#define NUM_PDU_PER_CONNECTION(iscsi)	(2 * (iscsi->MaxQueueDepth + iscsi->MaxLargeDataInPerConnection + 8))
 #define PDU_POOL_SIZE(iscsi)		(iscsi->MaxConnections * NUM_PDU_PER_CONNECTION(iscsi))
 #define IMMEDIATE_DATA_POOL_SIZE(iscsi)	(iscsi->MaxConnections * 128)
 #define DATA_OUT_POOL_SIZE(iscsi)	(iscsi->MaxConnections * MAX_DATA_OUT_PER_CONNECTION)
@@ -376,6 +376,9 @@ iscsi_log_globals(void)
 			      "DiscoveryAuthGroup AuthGroup%d\n",
 			      g_iscsi.chap_group);
 	}
+
+	SPDK_DEBUGLOG(SPDK_LOG_ISCSI, "MaxLargeDataInPerConnection %d\n",
+		      g_iscsi.MaxLargeDataInPerConnection);
 }
 
 static void
@@ -767,6 +770,7 @@ iscsi_set_global_params(struct spdk_iscsi_opts *opts)
 	g_iscsi.require_chap = opts->require_chap;
 	g_iscsi.mutual_chap = opts->mutual_chap;
 	g_iscsi.chap_group = opts->chap_group;
+	g_iscsi.MaxLargeDataInPerConnection = DEFAULT_MAX_LARGE_DATAIN_PER_CONNECTION;
 
 	iscsi_log_globals();
 
diff --git a/test/unit/lib/iscsi/conn.c/conn_ut.c b/test/unit/lib/iscsi/conn.c/conn_ut.c
index 967e16ec1..e77593b37 100644
--- a/test/unit/lib/iscsi/conn.c/conn_ut.c
+++ b/test/unit/lib/iscsi/conn.c/conn_ut.c
@@ -56,7 +56,10 @@ struct spdk_scsi_lun {
 	uint8_t reserved;
 };
 
-struct spdk_iscsi_globals g_iscsi;
+struct spdk_iscsi_globals g_iscsi = {
+	.MaxLargeDataInPerConnection = DEFAULT_MAX_LARGE_DATAIN_PER_CONNECTION,
+};
+
 static TAILQ_HEAD(read_tasks_head, spdk_iscsi_task) g_ut_read_tasks =
 	TAILQ_HEAD_INITIALIZER(g_ut_read_tasks);
 static struct spdk_iscsi_task *g_new_task = NULL;
@@ -570,7 +573,7 @@ free_tasks_on_connection(void)
 	TAILQ_INIT(&conn.write_pdu_list);
 	TAILQ_INIT(&conn.snack_pdu_list);
 	TAILQ_INIT(&conn.queued_datain_tasks);
-	conn.data_in_cnt = MAX_LARGE_DATAIN_PER_CONNECTION;
+	conn.data_in_cnt = g_iscsi.MaxLargeDataInPerConnection;
 
 	pdu1.task = &task1;
 	pdu2.task = &task2;
@@ -724,7 +727,7 @@ abort_queued_datain_task_test(void)
 	TAILQ_INSERT_TAIL(&conn.queued_datain_tasks, &task, link);
 
 	/* No slots for sub read tasks */
-	conn.data_in_cnt = MAX_LARGE_DATAIN_PER_CONNECTION;
+	conn.data_in_cnt = g_iscsi.MaxLargeDataInPerConnection;
 	rc = _iscsi_conn_abort_queued_datain_task(&conn, &task);
 	CU_ASSERT(rc != 0);
 	CU_ASSERT(!TAILQ_EMPTY(&conn.queued_datain_tasks));
@@ -747,7 +750,7 @@ abort_queued_datain_task_test(void)
 	TAILQ_INSERT_TAIL(&conn.queued_datain_tasks, &task, link);
 
 	/* No slots for sub read tasks */
-	conn.data_in_cnt = MAX_LARGE_DATAIN_PER_CONNECTION;
+	conn.data_in_cnt = g_iscsi.MaxLargeDataInPerConnection;
 	rc = _iscsi_conn_abort_queued_datain_task(&conn, &task);
 	CU_ASSERT(rc != 0);
 	CU_ASSERT(!TAILQ_EMPTY(&conn.queued_datain_tasks));