diff --git a/example/demo/conf/default.conf b/example/demo/conf/default.conf
index e9dad5d7..e7cef06c 100644
--- a/example/demo/conf/default.conf
+++ b/example/demo/conf/default.conf
@@ -1,10 +1,10 @@
 [hos_default_conf]
-hos_serverip=192.168.40.223
-hos_serverport=9099
+hos_serverip=192.168.10.1
+hos_serverport=9098
 hos_accesskeyid="default"
 hos_secretkey="default"
 hos_log_path="./log/hoslog" #default
-hos_log_level=30 #default
+hos_log_level=10 #default
 hos_poolsize=0 #default
 hos_thread_sum=32 #default
 hos_cache_size=102400 #default
diff --git a/example/demo/hos_write_demo.cpp b/example/demo/hos_write_demo.cpp
index 7d757a7c..70b27bcf 100644
--- a/example/demo/hos_write_demo.cpp
+++ b/example/demo/hos_write_demo.cpp
@@ -131,7 +131,7 @@ int main(int argc, char *argv[])
     mode = BUFF_MODE | APPEND_MODE;
     printf("hos_write buff start ...\n");
     snprintf(object, 1023, "%s_write_APPEND", file_name);
-    fd = hos_open_fd(bucket, object, callback, NULL, 0);
+    int err = hos_open_fd(bucket, object, callback, NULL, 0, &fd);
     if (hos_write(fd, buf, buffer.st_size) != HOS_CLIENT_OK)
     {
         printf("error: hos_write failed 1st!\n");
diff --git a/example/performance/HosClientPerformance.cpp b/example/performance/HosClientPerformance.cpp
index 59366474..8341d507 100644
--- a/example/performance/HosClientPerformance.cpp
+++ b/example/performance/HosClientPerformance.cpp
@@ -122,6 +122,7 @@ static int upload_file(char *file, char *buff, int buff_len, thread_info_t *thre
     double variance = 0.00;
     double average = 0.00;
     long time = 0;
+    int err = 0;
     //写文件
     
     //clock_gettime(CLOCK_MONOTONIC, &tstart);
@@ -154,7 +155,7 @@ static int upload_file(char *file, char *buff, int buff_len, thread_info_t *thre
     for (i = 0; i < g_test_count; i++)
     {
         clock_gettime(CLOCK_MONOTONIC, &tstart);
-        fd[i] = hos_open_fd(thread_info->bucket, thread_info->object, callback, NULL, thread_info->thread_num);
+        err = hos_open_fd(thread_info->bucket, thread_info->object, callback, NULL, thread_info->thread_num, &fd[i]);
         if (hos_write(fd[i], file, 0) != HOS_CLIENT_OK)
         {
             printf("error:hos_write file:%s\n", file);
@@ -210,10 +211,11 @@ static int upload_buff(char * buff, int buff_len, thread_info_t *thread_info, ch
     double variance = 0.00;
     double average = 0.00;
     long record[30000] = {0};
+    int err = 0;
 
     if (g_mode & APPEND_MODE)
     {
-        fd[0] = hos_open_fd(thread_info->bucket, thread_info->object, callback, NULL, thread_info->thread_num);
+        err = hos_open_fd(thread_info->bucket, thread_info->object, callback, NULL, thread_info->thread_num, &fd[0]);
 
         for (i = 0; i < g_test_count; i++)
         {
diff --git a/gtest/gtest_hos_close_fd.cpp b/gtest/gtest_hos_close_fd.cpp
index 160bda59..7d953521 100644
--- a/gtest/gtest_hos_close_fd.cpp
+++ b/gtest/gtest_hos_close_fd.cpp
@@ -77,7 +77,8 @@ TEST(hos_close_fd, normal)
     gtest_hos_handle_init(&expect_hos_handle, thread_num);
     CheckStructGHosHandle(&g_hos_handle, &expect_hos_handle);
 
-    long fd = hos_open_fd(HOS_BUCKET, "object", NULL, NULL, 0);
+    size_t fd = 0;
+    int err = hos_open_fd(HOS_BUCKET, "object", NULL, NULL, 0, &fd);
     CheckHosInstance(hos_instance, &expect_hos_instance);
     CheckStructGHosHandle(&g_hos_handle, &expect_hos_handle);
     gtest_hos_fd_init(&expect_fd_info);
@@ -121,7 +122,8 @@ TEST(hos_close_fd, paramer_error)
     expect_hos_handle.hos_config.thread_num=2;
     CheckStructGHosHandle(&g_hos_handle, &expect_hos_handle);
 
-    long fd = hos_open_fd(HOS_BUCKET, "object", NULL, NULL, 0);
+    size_t fd = 0;
+    int err = hos_open_fd(HOS_BUCKET, "object", NULL, NULL, 0, &fd);
     CheckHosInstance(hos_instance, &expect_hos_instance);
     CheckStructGHosHandle(&g_hos_handle, &expect_hos_handle);
     gtest_hos_fd_init(&expect_fd_info);
diff --git a/gtest/gtest_hos_open_fd.cpp b/gtest/gtest_hos_open_fd.cpp
index ac2ec3e6..ade49852 100644
--- a/gtest/gtest_hos_open_fd.cpp
+++ b/gtest/gtest_hos_open_fd.cpp
@@ -77,13 +77,15 @@ TEST(hos_open_fd, normal)
     gtest_hos_handle_init(&expect_hos_handle, 2);
     CheckStructGHosHandle(&g_hos_handle, &expect_hos_handle);
 
-    size_t fd = hos_open_fd(HOS_BUCKET, "object", NULL, NULL, 0);
+    size_t fd = 0;
+    int err = hos_open_fd(HOS_BUCKET, "object", NULL, NULL, 0, &fd);
     CheckHosInstance(hos_instance, &expect_hos_instance);
     CheckStructGHosHandle(&g_hos_handle, &expect_hos_handle);
     gtest_hos_fd_init(&expect_fd_info[0]);
     CheckStructGHosFdContext((hos_fd_context_t *)fd, &expect_fd_info[0]);
     
-    size_t fd1 = hos_open_fd(HOS_BUCKET, "object", NULL, NULL, 1);
+    size_t fd1 = 0;
+    err = hos_open_fd(HOS_BUCKET, "object", NULL, NULL, 1, &fd1);
     CheckHosInstance(hos_instance, &expect_hos_instance);
     CheckStructGHosHandle(&g_hos_handle, &expect_hos_handle);
     gtest_hos_fd_init(&expect_fd_info[1]);
@@ -129,8 +131,9 @@ TEST(hos_open_fd, paramer_error)
     gtest_hos_handle_init(&expect_hos_handle, 2);
     CheckStructGHosHandle(&g_hos_handle, &expect_hos_handle);
     
-    int fd = hos_open_fd(NULL, "object", NULL, NULL, 0);
-    EXPECT_EQ(fd, HOS_PARAMETER_ERROR);
+    size_t fd = 0;
+    int err = hos_open_fd(NULL, "object", NULL, NULL, 0, &fd);
+    EXPECT_EQ(err, HOS_PARAMETER_ERROR);
     CheckHosInstance(hos_instance, &expect_hos_instance);
     CheckStructGHosHandle(&g_hos_handle, &expect_hos_handle);
 
@@ -164,8 +167,9 @@ TEST(hos_open_fd, over_threadnums)
     gtest_hos_handle_init(&expect_hos_handle, 2);
     CheckStructGHosHandle(&g_hos_handle, &expect_hos_handle);
 
-    int fd = hos_open_fd(HOS_CONF, "object", NULL, NULL, 3);
-    EXPECT_EQ(fd, HOS_PARAMETER_ERROR);
+    size_t fd = 0;
+    int err = hos_open_fd(HOS_CONF, "object", NULL, NULL, 3, &fd);
+    EXPECT_EQ(err, HOS_PARAMETER_ERROR);
     CheckHosInstance(hos_instance, &expect_hos_instance);
     CheckStructGHosHandle(&g_hos_handle, &expect_hos_handle);
 
@@ -190,6 +194,7 @@ TEST(hos_open_fd, over_threadnums)
 
 TEST(hos_open_fd, not_init_instance)
 {
-    int fd = hos_open_fd(HOS_CONF, "object", NULL, NULL, 0);
-    EXPECT_EQ(fd, HOS_INSTANCE_NOT_ENABLE);
+    size_t fd = 0;
+    int err = hos_open_fd(HOS_CONF, "object", NULL, NULL, 0, &fd);
+    EXPECT_EQ(err, HOS_INSTANCE_NOT_ENABLE);
 }
\ No newline at end of file
diff --git a/gtest/gtest_hos_write.cpp b/gtest/gtest_hos_write.cpp
index c149c4a9..a987a165 100644
--- a/gtest/gtest_hos_write.cpp
+++ b/gtest/gtest_hos_write.cpp
@@ -121,7 +121,8 @@ TEST(hos_write, normal)
     data_info = (data_info_t *)expect_hos_handle.hos_func.fs2_info.reserved;
     CheckStructGHosHandle(&g_hos_handle, &expect_hos_handle);
 
-    size_t fd = hos_open_fd(HOS_BUCKET, "object_buff", hos_write_buff_cb, (void *)"object_buff", 0);
+    size_t fd = 0;
+    int err = hos_open_fd(HOS_BUCKET, "object_buff", hos_write_buff_cb, (void *)"object_buff", 0, &fd);
     CheckHosInstance(hos_instance, &expect_hos_instance);
     CheckStructGHosHandle(&g_hos_handle, &expect_hos_handle);
     gtest_hos_fd_init(&expect_fd_info[0]);
@@ -140,7 +141,8 @@ TEST(hos_write, normal)
     CheckHosInstance(hos_instance, &expect_hos_instance);
     CheckStructGHosHandle(&g_hos_handle, &expect_hos_handle);
 
-    size_t fd1 = hos_open_fd(HOS_BUCKET, "object_append", hos_write_append_cb, (void *)"object_append", 1);
+    size_t fd1 = 0;
+    err = hos_open_fd(HOS_BUCKET, "object_append", hos_write_append_cb, (void *)"object_append", 1, &fd1);
     CheckHosInstance(hos_instance, &expect_hos_instance);
     CheckStructGHosHandle(&g_hos_handle, &expect_hos_handle);
     gtest_hos_fd_init(&expect_fd_info[1]);
@@ -222,7 +224,8 @@ TEST(hos_write, bucket_not_exits)
     data_info = (data_info_t *)expect_hos_handle.hos_func.fs2_info.reserved;
     CheckStructGHosHandle(&g_hos_handle, &expect_hos_handle);
     
-    size_t fd = hos_open_fd("bucket_not_exits", "object_buff", hos_bucket_not_exits_cb, (void *)"object_buff", 0);
+    size_t fd = 0;
+    int err = hos_open_fd("bucket_not_exits", "object_buff", hos_bucket_not_exits_cb, (void *)"object_buff", 0, &fd);
     CheckHosInstance(hos_instance, &expect_hos_instance);
     CheckStructGHosHandle(&g_hos_handle, &expect_hos_handle);
     gtest_hos_fd_init(&expect_fd_info[0]);
@@ -240,7 +243,8 @@ TEST(hos_write, bucket_not_exits)
     CheckHosInstance(hos_instance, &expect_hos_instance);
     CheckStructGHosHandle(&g_hos_handle, &expect_hos_handle);
 
-    size_t fd1 = hos_open_fd("bucket_not_exits", "object_append", hos_bucket_not_exits_cb, (void *)"object_append", 1);
+    size_t fd1 = 0;
+    err = hos_open_fd("bucket_not_exits", "object_append", hos_bucket_not_exits_cb, (void *)"object_append", 1, &fd1);
     CheckHosInstance(hos_instance, &expect_hos_instance);
     CheckStructGHosHandle(&g_hos_handle, &expect_hos_handle);
     gtest_hos_fd_init(&expect_fd_info[1]);
@@ -323,7 +327,8 @@ TEST(hos_write, sync_mode)
     expect_hos_handle.hos_config.pool_thread_size = 0;
     CheckStructGHosHandle(&g_hos_handle, &expect_hos_handle);
 
-    size_t fd = hos_open_fd(HOS_BUCKET, "object_buff", NULL, NULL, 0);
+    size_t fd = 0;
+    int err = hos_open_fd(HOS_BUCKET, "object_buff", NULL, NULL, 0, &fd);
     CheckHosInstance(hos_instance, &expect_hos_instance);
     CheckStructGHosHandle(&g_hos_handle, &expect_hos_handle);
     gtest_hos_fd_init(&expect_fd_info[0]);
@@ -338,7 +343,8 @@ TEST(hos_write, sync_mode)
     CheckHosInstance(hos_instance, &expect_hos_instance);
     CheckStructGHosHandle(&g_hos_handle, &expect_hos_handle);
 
-    size_t fd1 = hos_open_fd(HOS_BUCKET, "object_append", NULL, NULL, 1);
+    size_t fd1 = 0;
+    err = hos_open_fd(HOS_BUCKET, "object_append", NULL, NULL, 1, &fd1);
     CheckHosInstance(hos_instance, &expect_hos_instance);
     CheckStructGHosHandle(&g_hos_handle, &expect_hos_handle);
     gtest_hos_fd_init(&expect_fd_info[1]);
@@ -418,7 +424,8 @@ TEST(hos_write, sync_mode_bucket_not_exits)
     expect_hos_handle.hos_config.pool_thread_size = 0;
     CheckStructGHosHandle(&g_hos_handle, &expect_hos_handle);
     
-    size_t fd = hos_open_fd(HOS_CONF, "object_buff", NULL, NULL, 0);
+    size_t fd = 0;
+    int err = hos_open_fd(HOS_CONF, "object_buff", NULL, NULL, 0, &fd);
     CheckHosInstance(hos_instance, &expect_hos_instance);
     CheckStructGHosHandle(&g_hos_handle, &expect_hos_handle);
     gtest_hos_fd_init(&expect_fd_info[0]);
@@ -435,7 +442,8 @@ TEST(hos_write, sync_mode_bucket_not_exits)
     CheckHosInstance(hos_instance, &expect_hos_instance);
     CheckStructGHosHandle(&g_hos_handle, &expect_hos_handle);
 
-    size_t fd1 = hos_open_fd(HOS_CONF, "object_append", NULL, NULL, 1);
+    size_t fd1 = 0;
+    err = hos_open_fd(HOS_CONF, "object_append", NULL, NULL, 1, &fd1);
     CheckHosInstance(hos_instance, &expect_hos_instance);
     CheckStructGHosHandle(&g_hos_handle, &expect_hos_handle);
     gtest_hos_fd_init(&expect_fd_info[1]);
@@ -513,7 +521,8 @@ TEST(hos_write, paramer_error)
     gtest_hos_handle_init(&expect_hos_handle, thread_num);
     CheckStructGHosHandle(&g_hos_handle, &expect_hos_handle);
     
-    long fd = hos_open_fd(HOS_BUCKET, "object_buff", hos_callback, NULL, 0);
+    size_t fd = 0;
+    int err = hos_open_fd(HOS_BUCKET, "object_buff", hos_callback, NULL, 0, &fd);
     CheckHosInstance(hos_instance, &expect_hos_instance);
     CheckStructGHosHandle(&g_hos_handle, &expect_hos_handle);
     gtest_hos_fd_init(&expect_fd_info);
@@ -597,7 +606,8 @@ TEST(hos_write, over_threadnums)
     gtest_hos_handle_init(&expect_hos_handle, thread_num);
     CheckStructGHosHandle(&g_hos_handle, &expect_hos_handle);
 
-    long fd = hos_open_fd(HOS_BUCKET, "object", NULL, NULL, 0);
+    size_t fd = 0;
+    int err = hos_open_fd(HOS_BUCKET, "object", NULL, NULL, 0, &fd);
     CheckHosInstance(hos_instance, &expect_hos_instance);
     CheckStructGHosHandle(&g_hos_handle, &expect_hos_handle);
     gtest_hos_fd_init(&expect_fd_info);
@@ -657,7 +667,7 @@ static void *hos_function(void *ptr)
     size_t thread_id = reinterpret_cast<size_t>(ptr);
     hos_instance hos_instance = NULL;
     int i = 0;
-    long fd[HOS_FD_NUMS_LOCAL] = {0};
+    size_t fd[HOS_FD_NUMS_LOCAL] = {0};
     char object[HOS_FD_NUMS_LOCAL][1024];
     int ret = 0;
     hos_instance_s expect_hos_instance;
@@ -665,6 +675,7 @@ static void *hos_function(void *ptr)
     hos_fd_context_t expect_fd_info[32][20];
     int thread_num = 32;
     data_info_t *data_info = NULL;
+    int err = 0;
 
     {
         hos_instance = hos_get_instance();
@@ -683,8 +694,8 @@ static void *hos_function(void *ptr)
     for (i = 0; i < HOS_FD_NUMS_LOCAL; i++)
     {
         snprintf(object[i], 1024, "object_%lu_%d", thread_id, i);
-        fd[i] = hos_open_fd(HOS_BUCKET, object[i], hos_callback, object[i], 0);
-        EXPECT_EQ(fd[i], i + 1);
+        err = hos_open_fd(HOS_BUCKET, object[i], hos_callback, object[i], 0, &fd[i]);
+        EXPECT_EQ(err, i + 1);
         CheckHosInstance(hos_instance, &expect_hos_instance);
         CheckStructGHosHandle(&g_hos_handle, &expect_hos_handle);
         gtest_hos_fd_init(&expect_fd_info[thread_id][i]);
diff --git a/src/hos_client.cpp b/src/hos_client.cpp
index 6fc5d0f7..3266fd53 100644
--- a/src/hos_client.cpp
+++ b/src/hos_client.cpp
@@ -892,10 +892,11 @@ int hos_upload_buf(const char *bucket, const char *object, const char *buf, size
     return hos_upload_stream(bucket, object, buf, buf_len, callback, userdata, thread_id);
 }
 
-long hos_open_fd(const char *bucket, const char *object, put_finished_callback callback, void *userdata, size_t thread_id)
+int hos_open_fd(const char *bucket, const char *object, put_finished_callback callback, void *userdata, size_t thread_id, size_t *fd)
 {
     if (g_hos_instance.status != INSTANCE_ENABLE_STATE)
     {
+        *fd = 0;
         return HOS_INSTANCE_NOT_ENABLE;
     }
     if ((bucket == NULL) || (object == NULL) || (thread_id > g_hos_handle.hos_config.thread_num) || strlen(bucket) == 0 || strlen(object) == 0)
@@ -903,6 +904,7 @@ long hos_open_fd(const char *bucket, const char *object, put_finished_callback c
         MESA_HANDLE_RUNTIME_LOG(g_hos_handle.log, RLOG_LV_FATAL, "hos_open_fd", 
             "error: [%s] bucket:%s, obejct:%s, thread_id:%lu", g_hos_instance.hos_url_prefix,
             (bucket == NULL)?"null":bucket, (object == NULL)?"null":object, thread_id);
+        *fd = 0;
         return HOS_PARAMETER_ERROR;
     }
 
@@ -922,7 +924,8 @@ long hos_open_fd(const char *bucket, const char *object, put_finished_callback c
 
     MESA_HANDLE_RUNTIME_LOG(g_hos_handle.log, RLOG_LV_DEBUG, "hos_open_fd", "debug: [%s] thread_id:%lu, fd:%lu", g_hos_instance.hos_url_prefix, thread_id, (long)&hos_fd);
 
-    return (long)hos_fd;
+    *fd = (size_t)hos_fd;
+    return HOS_CLIENT_OK;
 }
 
 int hos_write(size_t fd, const char *stream, size_t stream_len)
diff --git a/src/hos_client.h b/src/hos_client.h
index 21d3fb37..7e3b048a 100644
--- a/src/hos_client.h
+++ b/src/hos_client.h
@@ -130,7 +130,7 @@ int hos_upload_buf(const char *bucket, const char *object, const char *buf, size
  *          int mode                    模式 (FILE OR BUFFER, APPEND OR NOT)
  * 返回值   long                         成功返回fd(fd >0)，失败返回hoserros错误码
 *************************************************************************************/
-long hos_open_fd(const char *bucket, const char *object, put_finished_callback callback, void *userdata, size_t thread_id);
+int hos_open_fd(const char *bucket, const char *object, put_finished_callback callback, void *userdata, size_t thread_id, size_t *fd);
 /*************************************************************************************
  * 函数名： hos_write
  * 参数：   size_t fd                     hos_open_fd返回的fd