diff --git a/example/singleThread b/example/singleThread
deleted file mode 100755
index bf348577..00000000
Binary files a/example/singleThread and /dev/null differ
diff --git a/example/single_thread.cpp b/example/single_thread.cpp
deleted file mode 100644
index 71a4e6a4..00000000
--- a/example/single_thread.cpp
+++ /dev/null
@@ -1,150 +0,0 @@
-/*************************************************************************
-    > File Name: single_thread.cpp
-    > Author: pxz
-    > Created Time: Fri 11 Sep 2020 09:52:05 AM CST
- ************************************************************************/
-extern "C"
-{
-#include<stdio.h>
-#include<stdlib.h>
-#include<unistd.h>
-#include<string.h>
-#include<time.h>
-}
-#include"../src/hos_client.h"
-
-//#define test_times 10000
-
-#define debuginfo (void)
-
-typedef struct userdata_s
-{
-    struct timespec *finished;
-}userdata_t;
-
-static size_t  calc_time(struct timespec start, struct timespec end)
-{
-    return (end.tv_sec * 1000 * 1000 * 1000 + end.tv_nsec - 
-        (start.tv_sec * 1000 * 1000 * 1000 + start.tv_nsec));
-}
-
-int file_to_buffer(const char *file, char *buffer, size_t *len)
-{
-    FILE *fp = fopen(file, "r");
-    int num = 0;
-    *len = 0;
-    if (fp == NULL)
-    {
-        debuginfo("fopen file failed:%s\n", file);
-        return -1;
-    }
-    do{
-        num = fread(&buffer[*len], 1, 4096, fp);
-        if (num < 0)
-        {
-            return -1;
-        }
-        *len += num;
-    }while(num == 4096);
-    fclose(fp);
-    return 0;
-}
-
-void callback(bool result, const char *error, void *userdata)
-{
-    userdata_t *data = (userdata_t *)userdata;
-    clock_gettime(CLOCK_MONOTONIC, data->finished);
-    return ;
-}
-
-int main(int argc, char *argv[])
-{
-    if (argc != 4)
-    {
-        debuginfo("usege: singThread [bucket name] [object name]\n");
-        return -1;
-    }
-    struct timespec start, end, finished;
-    size_t time;
-    int i = 0;
-    char *bucket = argv[1];
-    char *object = argv[2];
-    int test_times = atoi(argv[3]);
-    //int test_times = 10000;
-    //char *buf = (char *)malloc(1024 * 1024 * 4);
-    char buf[1024 * 1024 * 4];
-    size_t buf_size;
-    int mode = FILE_MODE;
-    size_t fd = 0; 
-    userdata_t data = {&finished};
-
-    file_to_buffer(object, buf, &buf_size);
-
-    debuginfo("hos_client_init start ...\n");
-    hos_client_handle handle = hos_client_create("http://192.168.44.10:9098/hos/", "default", "default", 4);
-    if (handle == NULL) 
-    {
-        debuginfo("error:hos_client_handle\n");
-        return -1;
-    }  
-    debuginfo("hos_client_init success ... \n");
-
-    debuginfo("hos_create_bucket start ... \n");
-    if(hos_create_bucket(handle, bucket))
-    {
-        debuginfo("hos_create_bucket failed ... \n");
-        return -1;
-    }
-    debuginfo("hos_create_bucket success ... \n");
-
-    debuginfo("hos_verify_bucket start ... \n");
-    if(!hos_verify_bucket(handle, bucket))
-    {
-        debuginfo("hos_verify_bucket failed ... \n");
-        return -1;
-    }
-    debuginfo("hos_verify_bucket success ... \n");
-    
-#if 0
-    fd = hos_open_fd(handle, bucket, object, callback, (void *)&data, 0, mode);
-    debuginfo("hos_upload_file start ...\n");
-    clock_gettime(CLOCK_MONOTONIC, &start);
-    for (i = 0; i < test_times; i++)
-    {
-        hos_write(fd, object, 0, 0);
-    }
-    clock_gettime(CLOCK_MONOTONIC, &end);
-    time = calc_time(start, end);
-    time /= test_times;
-    printf("hos_upload_file spent %llu ns\n", time);
-    debuginfo("hos_upload_file end ...\n");
-#else
-
-    mode = BUFF_MODE;
-    fd = 0; 
-    fd = hos_open_fd(handle, bucket, object, callback, (void *)&data, 0, mode);
-    debuginfo("hos_upload_buf start ...\n");
-    clock_gettime(CLOCK_MONOTONIC, &start);
-    for (i = 0; i < test_times; i++)
-    {
-        hos_write(fd, buf, buf_size, 0);
-    }
-    clock_gettime(CLOCK_MONOTONIC, &end);
-    time = calc_time(start, end);
-    time /= test_times;
-    printf("hos_upload_buf spent %llu ns\n", time);
-    debuginfo("hos_upload_buf end ...\n");
-
-#endif
-    debuginfo("hos_client_close start ...\n");
-    if (hos_client_destory(handle) == 0)
-    {
-        time = calc_time(start, finished);
-        time /= test_times;
-        printf("hos upload finished spent %llu ns\n", time);
-    }
-
-    debuginfo("hos_client_close end ...\n");
-
-    return 0;
-}
diff --git a/example/single_thread.cpp_old b/example/single_thread.cpp_old
deleted file mode 100644
index c11f6dcd..00000000
--- a/example/single_thread.cpp_old
+++ /dev/null
@@ -1,115 +0,0 @@
-/*************************************************************************
-    > File Name: single_thread.cpp
-    > Author: pxz
-    > Created Time: Fri 11 Sep 2020 09:52:05 AM CST
- ************************************************************************/
-extern "C"
-{
-#include<stdio.h>
-#include<unistd.h>
-#include<string.h>
-#include<time.h>
-}
-#include"../src/hos_client.h"
-
-#define MAX_TEST_TIMES 10
-
-static size_t  calc_time(struct timespec start, struct timespec end)
-{
-    return (end.tv_sec * 1000 * 1000 * 1000 + end.tv_nsec - 
-        (start.tv_sec * 1000 * 1000 * 1000 + start.tv_nsec));
-}
-
-void callback(bool result, const char *error, void *userdata)
-{
-    //printf("result : %s\n", result ? "true":"false");
-    if (result)
-        return ;
-    //printf("error: %s\n", error);
-    //printf("userdata:%s\n", (char *)userdata);
-    return ;
-}
-
-int main(int argc, char *argv[])
-{
-    if (argc != 3)
-    {
-        printf("usege: singThread [bucket name] [object name]\n");
-        return -1;
-    }
-    struct timespec start, end;
-    size_t time;
-    int i = 0;
-    char *bucket = argv[1];
-    char *object = argv[2];
-    printf("hos_client_init start ...\n");
-    hos_client_handle handle = hos_client_create("http://192.168.44.12:9098/hos/", "default", "default", 4);
-    if (handle == NULL) 
-    {
-        printf("error:hos_client_handle\n");
-        return -1;
-    }  
-    printf("hos_client_init success ... \n");
-
-    printf("hos_create_bucket start ... \n");
-    if(hos_create_bucket(handle, bucket))
-    {
-        printf("hos_create_bucket failed ... \n");
-        return -1;
-    }
-    printf("hos_create_bucket success ... \n");
-
-    printf("hos_verify_bucket start ... \n");
-    if(!hos_verify_bucket(handle, bucket))
-    {
-        printf("hos_verify_bucket failed ... \n");
-        return -1;
-    }
-    printf("hos_verify_bucket success ... \n");
-    
-    printf("hos_upload_file start ...\n");
-#if 1
-    clock_gettime(CLOCK_MONOTONIC, &start);
-    for (i = 0; i < MAX_TEST_TIMES; i++)
-    {
-        hos_upload_file(handle, bucket, object, callback, (void *)"this is userdata", 0);
-    }
-    clock_gettime(CLOCK_MONOTONIC, &end);
-    time = calc_time(start, end);
-    time /= MAX_TEST_TIMES;
-    printf("hos_upload_file spent %llu ns\n", time);
-#if 0
-    for (i = 0; i < MAX_TEST_TIMES; i++)
-    {
-        hos_close_fd(i, 0);
-    }
-#endif
-    printf("hos_upload_file end ...\n");
-#else
-
-    const char *buf = "this is hos_upload_buf\n";
-    size_t buf_len = strlen(buf);
-    printf("hos_upload_buf start ...\n");
-    clock_gettime(CLOCK_MONOTONIC, &start);
-    for (i = 1; i <= MAX_TEST_TIMES; i++)
-    {
-        hos_upload_buf(handle, bucket, object, buf, buf_len, callback, (void *)"this is userdata", 0);
-    }
-    clock_gettime(CLOCK_MONOTONIC, &end);
-    time = calc_time(start, end);
-    time /= MAX_TEST_TIMES;
-    printf("hos_upload_buf spent %llu ns\n", time);
-
-    for (i = 1; i <= MAX_TEST_TIMES; i++)
-    {
-        hos_close_fd(i, 0);
-    }
-    printf("hos_upload_buf end ...\n");
-
-#endif
-    printf("hos_client_close start ...\n");
-    hos_client_destory(handle);
-    printf("hos_client_close end ...\n");
-
-    return 0;
-}