1 | #include <IO/createWriteBufferFromFileBase.h> |
2 | #include <IO/WriteBufferFromFile.h> |
3 | #if defined(__linux__) || defined(__FreeBSD__) |
4 | #include <IO/WriteBufferAIO.h> |
5 | #endif |
6 | #include <Common/ProfileEvents.h> |
7 | |
8 | |
9 | namespace ProfileEvents |
10 | { |
11 | extern const Event CreatedWriteBufferOrdinary; |
12 | extern const Event CreatedWriteBufferAIO; |
13 | extern const Event CreatedWriteBufferAIOFailed; |
14 | } |
15 | |
16 | namespace DB |
17 | { |
18 | |
19 | std::unique_ptr<WriteBufferFromFileBase> createWriteBufferFromFileBase(const std::string & filename_, size_t estimated_size, |
20 | size_t aio_threshold, size_t buffer_size_, int flags_, mode_t mode, char * existing_memory_, |
21 | size_t alignment) |
22 | { |
23 | #if defined(__linux__) || defined(__FreeBSD__) |
24 | if (aio_threshold && estimated_size >= aio_threshold) |
25 | { |
26 | /// Attempt to open a file with O_DIRECT |
27 | try |
28 | { |
29 | auto res = std::make_unique<WriteBufferAIO>(filename_, buffer_size_, flags_, mode, existing_memory_); |
30 | ProfileEvents::increment(ProfileEvents::CreatedWriteBufferAIO); |
31 | return res; |
32 | } |
33 | catch (const ErrnoException &) |
34 | { |
35 | /// Fallback to cached IO if O_DIRECT is not supported. |
36 | ProfileEvents::increment(ProfileEvents::CreatedWriteBufferAIOFailed); |
37 | } |
38 | } |
39 | #else |
40 | (void)aio_threshold; |
41 | (void)estimated_size; |
42 | #endif |
43 | |
44 | ProfileEvents::increment(ProfileEvents::CreatedWriteBufferOrdinary); |
45 | return std::make_unique<WriteBufferFromFile>(filename_, buffer_size_, flags_, mode, existing_memory_, alignment); |
46 | } |
47 | |
48 | } |
49 | |