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Restore buffering logic lost to botched merge

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This commit is contained in:
Andrew Noyes 2021-01-15 20:10:39 +00:00
parent dadc4d1b21
commit 5743fe724c
1 changed files with 29 additions and 6 deletions
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35
fdbclient/BackupContainerLocalDirectory.actor.cpp
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@ -31,15 +31,37 @@ namespace {
class BackupFile : public IBackupFile, ReferenceCounted<BackupFile> {
public:
BackupFile(std::string fileName, Reference<IAsyncFile> file, std::string finalFullPath)
: IBackupFile(fileName), m_file(file), m_finalFullPath(finalFullPath), m_offset(0) {}
: IBackupFile(fileName), m_file(file), m_finalFullPath(finalFullPath), m_writeOffset(0) {
m_buffer.reserve(m_buffer.arena(), CLIENT_KNOBS->BACKUP_LOCAL_FILE_WRITE_BLOCK);
}
Future<Void> append(const void* data, int len) {
Future<Void> r = m_file->write(data, len, m_offset);
m_offset += len;
m_buffer.append(m_buffer.arena(), (const uint8_t*)data, len);
if (m_buffer.size() >= CLIENT_KNOBS->BACKUP_LOCAL_FILE_WRITE_BLOCK) {
return flush(CLIENT_KNOBS->BACKUP_LOCAL_FILE_WRITE_BLOCK);
}
return Void();
}
Future<Void> flush(int size) {
ASSERT(size <= m_buffer.size());
// Keep a reference to the old buffer
Standalone<VectorRef<uint8_t>> old = m_buffer;
// Make a new buffer, initialized with the excess bytes over the block size from the old buffer
m_buffer = Standalone<VectorRef<uint8_t>>(old.slice(size, old.size()));
// Write the old buffer to the underlying file and update the write offset
Future<Void> r = holdWhile(old, m_file->write(old.begin(), size, m_writeOffset));
m_writeOffset += size;
return r;
}
ACTOR static Future<Void> finish_impl(Reference<BackupFile> f) {
wait(f->flush(f->m_buffer.size()));
wait(f->m_file->truncate(f->size())); // Some IAsyncFile implementations extend in whole block sizes.
wait(f->m_file->sync());
std::string name = f->m_file->getFilename();
@ -48,17 +70,18 @@ public:
return Void();
}
Future<Void> finish() { return finish_impl(Reference<BackupFile>::addRef(this)); }
int64_t size() const { return m_buffer.size() + m_writeOffset; }
int64_t size() const override { return m_offset; }
Future<Void> finish() { return finish_impl(Reference<BackupFile>::addRef(this)); }
void addref() override { return ReferenceCounted<BackupFile>::addref(); }
void delref() override { return ReferenceCounted<BackupFile>::delref(); }
private:
Reference<IAsyncFile> m_file;
Standalone<VectorRef<uint8_t>> m_buffer;
int64_t m_writeOffset;
std::string m_finalFullPath;
int64_t m_offset;
};
ACTOR static Future<BackupContainerFileSystem::FilesAndSizesT> listFiles_impl(std::string path, std::string m_path) {