ClickHouse/src/Storages/Freeze.h
2022-06-08 15:21:14 +03:00

46 lines
1.3 KiB
C++

#pragma once
#include <Storages/StorageReplicatedMergeTree.h>
#include <Storages/MergeTree/MergeTreeData.h>
namespace DB
{
/// Special metadata used during freeze table. Required for zero-copy
/// replication.
struct FreezeMetaData
{
public:
void fill(const StorageReplicatedMergeTree & storage);
void save(DiskPtr data_disk, const String & path) const;
bool load(DiskPtr data_disk, const String & path);
static void clean(DiskPtr data_disk, const String & path);
private:
static String getFileName(const String & path);
public:
int version = 1;
bool is_replicated{false};
bool is_remote{false};
String replica_name;
String zookeeper_name;
String table_shared_id;
};
class Unfreezer
{
public:
PartitionCommandsResultInfo unfreezePartitionsFromTableDirectory(MergeTreeData::MatcherFn matcher, const String & backup_name, const Disks & disks, const fs::path & table_directory, ContextPtr local_context);
BlockIO unfreeze(const String & backup_name, ContextPtr local_context);
private:
Poco::Logger * log = &Poco::Logger::get("Unfreezer");
static constexpr std::string_view backup_directory_prefix = "shadow";
static bool removeFreezedPart(DiskPtr disk, const String & path, const String & part_name, ContextPtr local_context);
};
}