foedus::savepoint::FixedSavepoint Struct Reference

Savepoint that can be stored in shared memory. More...

Detailed Description

Savepoint that can be stored in shared memory.

Definition at line 169 of file savepoint.hpp.

#include <savepoint.hpp>

Collaboration diagram for foedus::savepoint::FixedSavepoint:

Public Member Functions
	FixedSavepoint ()=delete
	~FixedSavepoint ()=delete
uint32_t	get_total_logger_count () const
void	update (uint16_t node_count, uint16_t loggers_per_node_count, const Savepoint &src)
	Write out the content of the given Savepoint to this object. More...

Public Attributes
Epoch::EpochInteger	current_epoch_
Epoch::EpochInteger	durable_epoch_
Epoch::EpochInteger	earliest_epoch_
snapshot::SnapshotId	latest_snapshot_id_
Epoch::EpochInteger	latest_snapshot_epoch_
uint16_t	node_count_
	Number of NUMA nodes. More...
uint16_t	loggers_per_node_count_
	Number of loggers per node. More...
uint64_t	meta_log_oldest_offset_
uint64_t	meta_log_durable_offset_
LoggerSavepointInfo	logger_info_ [1U<< 16]
	Stores all loggers' information. More...

Constructor & Destructor Documentation

foedus::savepoint::FixedSavepoint::FixedSavepoint ( )

delete

foedus::savepoint::FixedSavepoint::~FixedSavepoint ( )

delete

Member Function Documentation

uint32_t foedus::savepoint::FixedSavepoint::get_total_logger_count ( ) const

inline

Definition at line 195 of file savepoint.hpp.

References node_count_.

Referenced by update().

                                                                 {
    return static_cast<uint32_t>(node_count_) * loggers_per_node_count_;
  }

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void foedus::savepoint::FixedSavepoint::update	(	uint16_t	node_count,
		uint16_t	loggers_per_node_count,
		const Savepoint &	src
	)

Write out the content of the given Savepoint to this object.

Definition at line 94 of file savepoint.cpp.

References foedus::savepoint::Savepoint::current_epoch_, current_epoch_, foedus::savepoint::LoggerSavepointInfo::current_log_file_, foedus::savepoint::LoggerSavepointInfo::current_log_file_offset_durable_, foedus::savepoint::Savepoint::current_log_files_, foedus::savepoint::Savepoint::current_log_files_offset_durable_, foedus::savepoint::Savepoint::durable_epoch_, durable_epoch_, foedus::savepoint::Savepoint::earliest_epoch_, earliest_epoch_, get_total_logger_count(), foedus::savepoint::Savepoint::latest_snapshot_epoch_, latest_snapshot_epoch_, foedus::savepoint::Savepoint::latest_snapshot_id_, latest_snapshot_id_, logger_info_, loggers_per_node_count_, foedus::savepoint::Savepoint::meta_log_durable_offset_, meta_log_durable_offset_, foedus::savepoint::Savepoint::meta_log_oldest_offset_, meta_log_oldest_offset_, node_count_, foedus::savepoint::LoggerSavepointInfo::oldest_log_file_, foedus::savepoint::LoggerSavepointInfo::oldest_log_file_offset_begin_, foedus::savepoint::Savepoint::oldest_log_files_, and foedus::savepoint::Savepoint::oldest_log_files_offset_begin_.

Referenced by foedus::savepoint::SavepointManagerPimpl::update_shared_savepoint().

                        {
  node_count_ = node_count;
  loggers_per_node_count_ = loggers_per_node_count;
  current_epoch_ = src.current_epoch_;
  durable_epoch_ = src.durable_epoch_;
  earliest_epoch_ = src.earliest_epoch_;
  latest_snapshot_id_ = src.latest_snapshot_id_;
  latest_snapshot_epoch_ = src.latest_snapshot_epoch_;
  meta_log_oldest_offset_ = src.meta_log_oldest_offset_;
  meta_log_durable_offset_ = src.meta_log_durable_offset_;
  uint32_t count = get_total_logger_count();
  for (uint32_t i = 0; i < count; ++i) {
    logger_info_[i].oldest_log_file_ = src.oldest_log_files_[i];
    logger_info_[i].oldest_log_file_offset_begin_ = src.oldest_log_files_offset_begin_[i];
    logger_info_[i].current_log_file_ = src.current_log_files_[i];
    logger_info_[i].current_log_file_offset_durable_ = src.current_log_files_offset_durable_[i];
  }
}

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Member Data Documentation

Epoch::EpochInteger foedus::savepoint::FixedSavepoint::current_epoch_

Definition at line 174 of file savepoint.hpp.

Referenced by update().

Epoch::EpochInteger foedus::savepoint::FixedSavepoint::durable_epoch_

Definition at line 175 of file savepoint.hpp.

Referenced by update().

Epoch::EpochInteger foedus::savepoint::FixedSavepoint::earliest_epoch_

Definition at line 176 of file savepoint.hpp.

Referenced by update().

Epoch::EpochInteger foedus::savepoint::FixedSavepoint::latest_snapshot_epoch_

Definition at line 178 of file savepoint.hpp.

Referenced by foedus::savepoint::SavepointManagerPimpl::get_latest_snapshot_epoch(), foedus::savepoint::SavepointManagerPimpl::savepoint_main(), and update().

snapshot::SnapshotId foedus::savepoint::FixedSavepoint::latest_snapshot_id_

Definition at line 177 of file savepoint.hpp.

Referenced by foedus::savepoint::SavepointManagerPimpl::get_latest_snapshot_id(), foedus::savepoint::SavepointManagerPimpl::savepoint_main(), and update().

LoggerSavepointInfo foedus::savepoint::FixedSavepoint::logger_info_[1U<< 16]

Stores all loggers' information.

We allocate memory enough for the largest number of loggers. In reality, we are just reading/writing a small piece of it. 24b * 64k = 1.5MB.

Definition at line 193 of file savepoint.hpp.

Referenced by foedus::savepoint::SavepointManagerPimpl::get_logger_savepoint(), and update().

uint16_t foedus::savepoint::FixedSavepoint::loggers_per_node_count_

Number of loggers per node.

same above.

Definition at line 183 of file savepoint.hpp.

Referenced by update().

uint64_t foedus::savepoint::FixedSavepoint::meta_log_durable_offset_

Definition at line 186 of file savepoint.hpp.

Referenced by foedus::savepoint::SavepointManager::change_meta_logger_durable_offset(), foedus::savepoint::SavepointManager::get_meta_logger_offsets(), and update().

uint64_t foedus::savepoint::FixedSavepoint::meta_log_oldest_offset_

Definition at line 185 of file savepoint.hpp.

Referenced by foedus::savepoint::SavepointManager::get_meta_logger_offsets(), and update().

uint16_t foedus::savepoint::FixedSavepoint::node_count_

Number of NUMA nodes.

the information is availble elsewhere, but easier to duplicate here.

Definition at line 181 of file savepoint.hpp.

Referenced by get_total_logger_count(), and update().

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The documentation for this struct was generated from the following files:

• /home/shino/foedus_code/foedus-core/include/foedus/savepoint/savepoint.hpp
• /home/shino/foedus_code/foedus-core/src/foedus/savepoint/savepoint.cpp