int _tmain(int argc, _TCHAR* argv[])
{
uint32_t uSize = 5000; // 4gb 이상 가능
LARGE_INTEGER Size; //
DWORD bufSize = 2048; // 32bit가 4gb 인데 실질적으로 2gb 사용 가능
// 그러니 최대인 2048M 씩 할당
LARGE_INTEGER offset; // 크기
offset.QuadPart = (LONGLONG)0;
StopWatch sw1, sw2;
Size.QuadPart = (LONGLONG)(1024 * 1024) * (LONGLONG)uSize;;
_ASSERTE(create_very_big_file(L"big.txt", uSize));
sw1.Start();
_ASSERTE(file_copy_using_read_write(L"big.txt", L"big2.txt"));
sw1.Stop();
print("info] time elapsed = %f", sw1.GetDurationSecond());
PUCHAR buf = (PUCHAR)malloc(bufSize);
sw2.Start();
FileIoHelper Helper;
Helper.FIOpenForRead(L"big.txt");
Helper.FIOCreateFile(L"big3.txt", Size);
while (offset.QuadPart < Size.QuadPart)
{
if ((Size.QuadPart - offset.QuadPart) >(LONGLONG)bufSize)
bufSize = 2048;
else
bufSize = (DWORD)(Size.QuadPart - offset.QuadPart);
Helper.FIOReadFromFile(offset, bufSize, buf);
Helper.FIOWriteToFile(offset, bufSize, buf);
offset.QuadPart += (LONGLONG)bufSize;
}
sw2.Stop();
print("info] time elapsed = %f", sw2.GetDurationSecond());
return 0;
}
int _tmain(int argc, _TCHAR* argv[])
{
uint32_t goalsize = 6144; // 6GB
_ASSERTE(create_very_big_file(L"big.txt",goalsize));//목표크기 6GB만큼 파일 생성
StopWatch sw;
sw.Start();
_ASSERTE(file_copy_using_read_write(L"big.txt", L"big2.txt"));
sw.Stop();
print("info] (Read Write) time elapsed = %f", sw.GetDurationSecond());
LARGE_INTEGER _Filesize;
_Filesize.QuadPart = (LONGLONG)(1024*1024)*(LONGLONG)goalsize;//파일의 크기 6GB 설정하기위해 LARGE_INTEGER
DWORD bufS = 4096; // read.write에서 buf가 4096이므로 4096설정
PUCHAR buf = (PUCHAR)malloc(bufS);
LARGE_INTEGER _Offset;
_Offset.QuadPart = 0; //파일을 옮겨주는 계산을 하는데 사용한다.
StopWatch sw2;
sw2.Start();
FileIoHelper FileHelp;
FileHelp.FIOpenForRead(L"big.txt");
FileHelp.FIOCreateFile(L"big3.txt", _Filesize);
while(_Filesize.QuadPart > _Offset.QuadPart)
{
if((_Filesize.QuadPart - _Offset.QuadPart) > (LONGLONG)bufS)
bufS = 4096;
else
bufS = (DWORD)(_Filesize.QuadPart - _Offset.QuadPart);
FileHelp.FIOReadFromFile(_Offset, bufS, buf);
FileHelp.FIOWriteToFile(_Offset, bufS, buf);
_Offset.QuadPart += (LONGLONG)bufS;
}
sw2.Stop();
print("info] (Memory Map) time elapsed = %f", sw2.GetDurationSecond());
return 0;
}
int _tmain(int argc, _TCHAR* argv[])
{
/*
_ASSERTE(create_very_big_file(L"big.txt", 5000));
StopWatch sw2;
sw2.Start();
_ASSERTE(file_copy_using_memory_map(L"big.txt", L"big3.txt"));
sw2.Stop();
print("info] time elapsed = %f", sw2.GetDurationSecond());
StopWatch sw;
sw.Start();
_ASSERTE(file_copy_using_read_write(L"big.txt", L"big4.txt"));
sw.Stop();
print("info] time elapsed = %f", sw.GetDurationSecond());
*/
FileIoHelper Helper;
uint64_t size=5000;
LARGE_INTEGER file_size;
LARGE_INTEGER offset;
offset.QuadPart = 0;
DWORD bufsize = 2048*1024*1024;
PUCHAR buf = (PUCHAR)malloc(bufsize);
file_size.QuadPart = (1024 * 1024) * size;
_ASSERTE(create_very_big_file(L"big.txt", size));
StopWatch sw2;
sw2.Start();
Helper.FIOpenForRead(L"big.txt");
Helper.FIOCreateFile(L"big2.txt", file_size);
while (offset.QuadPart < file_size.QuadPart) {
if ((file_size.QuadPart - offset.QuadPart) >(LONGLONG)bufsize)
{
bufsize = 2048*1024*1024;
}
else {
bufsize = (DWORD)(file_size.QuadPart - offset.QuadPart);
}
Helper.FIOReadFromFile(offset, bufsize, buf);
Helper.FIOWriteToFile(offset, bufsize, buf);
offset.QuadPart += (LONGLONG)bufsize;
}
sw2.Stop();
print("info] time elapsed = %f", sw2.GetDurationSecond());
StopWatch sw;
sw.Start();
_ASSERTE(file_copy_using_read_write(L"big.txt", L"big3.txt"));
sw.Stop();
print("info] time elapsed = %f", sw.GetDurationSecond());
_getwch();
return 0;
}
