random.h

/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
 * Distributed under BSD 3-Clause license.                                   *
 * Copyright by The HDF Group.                                               *
 * Copyright by the Illinois Institute of Technology.                        *
 * All rights reserved.                                                      *
 *                                                                           *
 * This file is part of Hermes. The full Hermes copyright notice, including  *
 * terms governing use, modification, and redistribution, is contained in    *
 * the COPYING file, which can be found at the top directory. If you do not  *
 * have access to the file, you may request a copy from help@hdfgroup.org.   *
 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
#ifndef HERMES_SRC_DPE_RANDOM_H_
#define HERMES_SRC_DPE_RANDOM_H_
 
#include "data_placement_engine.h"
 
namespace hermes {
class Random : public DPE {
 public:
  Random() : DPE(PlacementPolicy::kRandom) {}
  ~Random() = default;
  Status Placement(const std::vector<size_t> &blob_sizes,
                   const std::vector<u64> &node_state,
                   const std::vector<TargetID> &targets,
                   const api::Context &ctx,
                   std::vector<PlacementSchema> &output);
 
 private:
  void GetOrderedCapacities(const std::vector<u64> &node_state,
                            const std::vector<TargetID> &targets,
                            std::multimap<u64, TargetID> &ordered_cap);
  Status AddSchema(std::multimap<u64, TargetID> &ordered_cap, size_t blob_size,
                   PlacementSchema &schema);
};
 
}  // namespace hermes
 
#endif  // HERMES_SRC_DPE_RANDOM_H_