tair-kvcache/kv_cache_manager/data_storage/hf3fs_backend.h at e6ee490350244407e4a4337a205d785cdb39dd90 · alibaba/tair-kvcache · GitHub

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#pragma once

#include <filesystem>
#include <memory>

#include "kv_cache_manager/data_storage/data_storage_backend.h"

namespace kv_cache_manager {

class MetricsRegistry;

class Hf3fsBackend : public DataStorageBackend {
public:
    Hf3fsBackend() = delete;
    explicit Hf3fsBackend(std::shared_ptr<MetricsRegistry> metrics_registry);
    ~Hf3fsBackend() override = default;
    DataStorageType GetType() override;
    bool Available() override;
    double GetStorageUsageRatio(const std::string &trace_id) const override;

public:
    ErrorCode DoOpen(const StorageConfig &storage_config, const std::string &trace_id) override;
    ErrorCode Close() override;

    std::vector<SpecCreateResult> Create(const CreateBlocksRequest &request,
                                        const std::string &trace_id,
                                        std::function<void()> cb) override;
    std::vector<ErrorCode> Delete(const std::vector<DataStorageUri> &storage_uris,
                                  const std::string &trace_id,
                                  std::function<void()> cb) override;
    std::vector<bool> Exist(const std::vector<DataStorageUri> &storage_uris) override;
    std::vector<ErrorCode> Lock(const std::vector<DataStorageUri> &storage_uris) override;
    std::vector<ErrorCode> UnLock(const std::vector<DataStorageUri> &storage_uris) override;

private:
    bool DoInit();
    bool TouchFile(const std::string &file_path);

private:
    ThreeFSStorageSpec spec_;
    std::filesystem::path base_path_;
};

} // namespace kv_cache_manager