zxealous commented on code in PR #12165:
URL: https://github.com/apache/doris/pull/12165#discussion_r958029282
##########
be/src/io/cache/sub_file_cache.cpp:
##########
@@ -153,27 +153,41 @@ Status SubFileCache::_generate_cache_reader(size_t
offset, size_t req_size) {
LOG(INFO) << "Download cache file from remote file: "
<< _remote_file_reader->path().native() << " -> "
<< cache_file.native();
- std::unique_ptr<char[]> file_buf(new char[req_size]);
- Slice file_slice(file_buf.get(), req_size);
- size_t bytes_read = 0;
- RETURN_NOT_OK_STATUS_WITH_WARN(
- _remote_file_reader->read_at(offset, file_slice,
&bytes_read),
- fmt::format("read remote file failed. {}. offset:
{}, size: {}",
- _remote_file_reader->path().native(),
offset, req_size));
- if (bytes_read != req_size) {
- LOG(ERROR) << "read remote file failed: "
- << _remote_file_reader->path().native()
- << ", bytes read: " << bytes_read
- << " vs file size: " <<
_remote_file_reader->size();
- return Status::OLAPInternalError(OLAP_ERR_OS_ERROR);
- }
io::FileWriterPtr file_writer;
RETURN_NOT_OK_STATUS_WITH_WARN(
io::global_local_filesystem()->create_file(cache_file, &file_writer),
fmt::format("Create local cache file failed: {}",
cache_file.native()));
- RETURN_NOT_OK_STATUS_WITH_WARN(
- file_writer->append(file_slice),
- fmt::format("Write local cache file failed: {}",
cache_file.native()));
+ char* file_buf =
ExecEnv::GetInstance()->get_download_cache_buf(
+
ExecEnv::GetInstance()->get_serial_download_cache_thread_token());
+ size_t count_bytes_read = 0;
+ size_t sub_req_size = config::download_cache_buffer_size;
+ while (count_bytes_read < req_size) {
+ if (req_size - count_bytes_read <
config::download_cache_buffer_size) {
Review Comment:
done
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