#include <certifier.h>

Inheritance diagram for Certifier:

Public Types
typedef std::unordered_map< std::string, Gtid_set_ref , std::hash< std::string >, std::equal_to< std::string >, Malloc_allocator< std::pair< const std::string, Gtid_set_ref > > >	Certification_info

typedef protobuf_replication_group_recovery_metadata::CertificationInformationMap	ProtoCertificationInformationMap

Public Member Functions
	Certifier ()

	~Certifier () override

int	initialize (ulonglong gtid_assignment_block_size)
	Initialize certifier. More...

int	terminate ()
	Terminate certifier. More...

void	handle_view_change () override
	Handle view changes on certifier. More...

int	handle_certifier_data (const uchar *data, ulong len, const Gcs_member_identifier &gcs_member_id) override
	Queues the packet coming from the reader for future processing. More...

gr::Certified_gtid	certify (Gtid_set snapshot_version, std::list< const char > write_set, bool is_gtid_specified, const char member_uuid, Gtid_log_event *gle, bool local_transaction)
	This member function SHALL certify the set of items against transactions that have already passed the certification test. More...

int	get_group_stable_transactions_set_string (char *buffer, size_t length) override
	Returns the transactions in stable set in text format, that is, the set of transactions already applied on all group members. More...

void	get_certification_info (std::map< std::string, std::string > *cert_info) override
	Retrieves the current certification info. More...

bool	get_certification_info_recovery_metadata (Recovery_metadata_message *recovery_metadata_message) override
	Retrieves the current certification info. More...

int	set_certification_info (std::map< std::string, std::string > *cert_info) override
	Sets the certification info according to the given value. More...

bool	set_certification_info_recovery_metadata (Recovery_metadata_message *recovery_metadata_message) override
	The received certification info from Recovery Metadata is decoded, compressed and added to the member certification info for certification. More...

bool	initialize_server_gtid_set_after_distributed_recovery () override
	Initializes the gtid_executed set. More...

ulonglong	get_positive_certified () override
	Get the number of postively certified transactions by the certifier. More...

ulonglong	get_negative_certified () override
	Get method to retrieve the number of negatively certified transactions. More...

ulonglong	get_certification_info_size () override
	Get method to retrieve the certification db size. More...

void	get_last_conflict_free_transaction (std::string *value) override
	Get method to retrieve the last conflict free transaction. More...

std::pair< Gtid, mysql::utils::Return_status >	generate_view_change_group_gtid ()
	Generate group GTID for a view change log event. More...

int	add_gtid_to_group_gtid_executed (const Gtid &gtid)
	Public method to add the given GTID value in the group_gtid_executed set which is used to support skip gtid functionality. More...

void	enable_conflict_detection () override
	Enables conflict detection. More...

void	disable_conflict_detection () override
	Disables conflict detection. More...

bool	is_conflict_detection_enable () override
	Check if conflict detection is enable. More...

void	gtid_intervals_computation ()
	Compute GTID intervals. More...

void	garbage_collect (Gtid_set *executed_gtid_set=nullptr, bool on_member_join=false) override
	Validates if garbage collect should run against the intersection of the received transactions stable sets. More...

Public Member Functions inherited from Certifier_interface
	~Certifier_interface () override=default

Public Member Functions inherited from Certifier_stats
virtual	~Certifier_stats ()=default

Static Public Attributes
static const std::string	CERTIFICATION_INFO_ERROR_NAME
	Key used to store errors in the certification info on View_change_log_event. More...

Private Types
enum	enum_update_status { STABLE_SET_UPDATED , STABLE_SET_ALREADY_CONTAINED , STABLE_SET_ERROR }

Private Member Functions
int	initialize_server_gtid_set (bool get_server_gtid_retrieved=false)
	Method to initialize the group_gtid_executed gtid set with the server gtid executed set and applier retrieved gtid set values. More...

void	increment_parallel_applier_sequence_number (bool update_parallel_applier_last_committed_global)
	This function updates parallel applier indexes. More...

void	add_to_group_gtid_executed_internal (rpl_sidno sidno, rpl_gno gno)
	Internal method to add the given gtid gno in the group_gtid_executed set. More...

const Gtid_set *	get_group_gtid_set () const
	Returns group_executed_gtid_set or group_extracted_gtid_set while certifying already applied transactions from the donor. More...

Gtid_set *	get_group_gtid_set ()
	Returns group_executed_gtid_set or group_extracted_gtid_set while certifying already applied transactions from the donor. More...

std::tuple< rpl_sidno, rpl_sidno, rpl_sidno, mysql::utils::Return_status >	extract_sidno (Gtid_log_event &gle, bool is_gtid_specified, Gtid_set &snapshot_gtid_set, Gtid_set &group_gtid_set)
	This function determines three sidnos for a specific TSID based on information obtained from the Gtid_log_event. More...

gr::Certified_gtid	end_certification_result (const rpl_sidno &gtid_server_sidno, const rpl_sidno &gtid_group_sidno, const rpl_gno &generated_gno, bool is_gtid_specified, bool local_transaction, const gr::Certification_result &certification_result)
	Internal helper method for ending certification, determination of final GTID values after certification according to certification result. More...

gr::Certification_result	add_writeset_to_certification_info (int64 &transaction_last_committed, Gtid_set snapshot_version, std::list< const char > *write_set, bool local_transaction)
	Adds the transaction's write set to certification info. More...

void	update_transaction_dependency_timestamps (Gtid_log_event &gle, bool has_write_set, bool has_write_set_large_size, int64 transaction_last_committed)
	Updates parallel applier indexes in GLE. More...

bool	is_initialized ()

bool	compress_packet (ProtoCertificationInformationMap &cert_info, unsigned char *uncompresssed_buffer, std::vector< GR_compress > &compressor_list, GR_compress::enum_compression_type compression_type)
	This shall serialize the certification info stored in protobuf map format, and then compress provided serialized string. More...

bool	set_certification_info_part (GR_compress::enum_compression_type compression_type, const unsigned char *buffer, unsigned long long buffer_length, unsigned long long uncompressed_buffer_length)
	Sets the certification info according to the given value. More...

void	clear_certification_info ()
	Empties certification info. More...

void	clear_members ()
	Method to clear the members. More...

bool	add_item (const char item, Gtid_set_ref snapshot_version, int64 *item_previous_sequence_number)
	Adds an item from transaction writeset to the certification DB. More...

Gtid_set *	get_certified_write_set_snapshot_version (const char *item)
	Find the snapshot_version corresponding to an item. More...

void	clear_incoming ()
	Clear incoming queue. More...

void	update_certified_transaction_count (bool result, bool local_transaction)

void	garbage_collect_internal (Gtid_set *intersection_gtid_set, bool preemptive=false)
	Removes the intersection of the received transactions stable sets from certification database. More...

bool	intersect_members_gtid_executed_and_garbage_collect ()
	Computes intersection between all sets received, so that we have the already applied transactions on all servers. More...

enum enum_update_status	update_stable_set (const Gtid_set &set)
	Update stable set with set if not already contained. More...

Private Attributes
std::atomic< bool >	initialized {false}
	Is certifier initialized. More...

rpl_sidno	group_gtid_tsid_map_group_sidno
	Variable to store the sidno used for transactions which will be logged with the group_uuid. More...

rpl_sidno	views_sidno_group_representation
	The sidno used for view log events as seen by the group sid map. More...

rpl_sidno	views_sidno_server_representation
	The sidno used for view log events as seen by the server sid map. More...

Gtid	last_conflict_free_transaction
	Last conflict free transaction identification. More...

Certification_info	certification_info
	Certification database. More...

Tsid_map *	certification_info_tsid_map

ulonglong	positive_cert

ulonglong	negative_cert

int64	parallel_applier_last_committed_global

int64	parallel_applier_sequence_number

bool	certifier_garbage_collection_block

bool	same_member_message_discarded

mysql_mutex_t	LOCK_certification_info

Checkable_rwlock *	stable_gtid_set_lock
	Stable set and garbage collector variables. More...

Tsid_map *	stable_tsid_map

Gtid_set *	stable_gtid_set

Synchronized_queue< Data_packet * > *	incoming

std::vector< std::string >	members

bool	certifying_already_applied_transactions

Tsid_map *	group_gtid_tsid_map

Gtid_set *	group_gtid_executed

Gtid_set *	group_gtid_extracted
	A Gtid_set which contains the gtid extracted from the certification info map of the donor. More...

gr::Gtid_generator	gtid_generator
	Object responsible for generation of the GTIDs for transactions with gtid_next equal to AUTOMATIC (tagged/untagged) More...

bool	conflict_detection_enable
	Conflict detection is performed when: 1) group is on multi-master mode; 2) group is on single-primary mode and primary is applying relay logs with transactions from a previous primary. More...

mysql_mutex_t	LOCK_members

Certifier_broadcast_thread *	broadcast_thread
	Broadcast thread. More...

bool	is_first_remote_transaction_certified {true}

Static Private Attributes
static const std::string	GTID_EXTRACTED_NAME = "gtid_extracted"
	Key used to store group_gtid_executed on certification info on View_change_log_event. More...

Member Typedef Documentation

◆ Certification_info

typedef std::unordered_map< std::string, Gtid_set_ref *, std::hash<std::string>, std::equal_to<std::string>, Malloc_allocator<std::pair<const std::string, Gtid_set_ref *> > > Certifier::Certification_info

◆ ProtoCertificationInformationMap

typedef protobuf_replication_group_recovery_metadata::CertificationInformationMap Certifier::ProtoCertificationInformationMap

Member Enumeration Documentation

◆ enum_update_status

enum Certifier::enum_update_status

private

Enumerator
STABLE_SET_UPDATED
STABLE_SET_ALREADY_CONTAINED
STABLE_SET_ERROR

Constructor & Destructor Documentation

◆ Certifier()

Certifier::Certifier ( )

◆ ~Certifier()

Certifier::~Certifier ( )

override

Member Function Documentation

◆ add_gtid_to_group_gtid_executed()

int Certifier::add_gtid_to_group_gtid_executed ( const Gtid & gtid )

Public method to add the given GTID value in the group_gtid_executed set which is used to support skip gtid functionality.

Parameters

[in] gtid GTID to be added

Return values

1	error during addition.
0	success.

◆ add_item()

bool Certifier::add_item	(	const char *	item,
		Gtid_set_ref *	snapshot_version,
		int64 *	item_previous_sequence_number
	)

private

Adds an item from transaction writeset to the certification DB.

Parameters

[in]	item	item in the writeset to be added to the Certification DB.
[in]	snapshot_version	Snapshot version of the incoming transaction which modified the above mentioned item.
[out]	item_previous_sequence_number	The previous parallel applier sequence number for this item.

Return values

False successfully added to the map. True otherwise.

◆ add_to_group_gtid_executed_internal()

void Certifier::add_to_group_gtid_executed_internal	(	rpl_sidno	sidno,
		rpl_gno	gno
	)

private

Internal method to add the given gtid gno in the group_gtid_executed set.

This will be used in the skip gtid implementation.

Note: this will update the last know local transaction GTID.

Parameters

[in]	sidno	rpl_sidno part of the executing gtid of the ongoing transaction.
[in]	gno	rpl_gno part of the executing gtid of the ongoing transaction.

◆ add_writeset_to_certification_info()

Certification_result Certifier::add_writeset_to_certification_info	(	int64 &	transaction_last_committed,
		Gtid_set *	snapshot_version,
		std::list< const char * > *	write_set,
		bool	local_transaction
	)

private

Adds the transaction's write set to certification info.

Parameters

[out]	transaction_last_committed	The transaction's logical timestamps used for MTS
[in,out]	snapshot_version	The incoming transaction snapshot version.
[in,out]	write_set	The incoming transaction write set.
[in]	local_transaction	True in case this transaction originates from the this server

◆ certify()

Certified_gtid Certifier::certify	(	Gtid_set *	snapshot_version,
		std::list< const char * > *	write_set,
		bool	is_gtid_specified,
		const char *	member_uuid,
		Gtid_log_event *	gle,
		bool	local_transaction
	)

This member function SHALL certify the set of items against transactions that have already passed the certification test.

Parameters

snapshot_version	The incoming transaction snapshot version.
write_set	The incoming transaction write set.
is_gtid_specified	True in case GTID is specified for this trx
member_uuid	The UUID of the member from which this transaction originates.
gle	The incoming transaction global identifier event.
local_transaction	True if this transaction did originate from this member, false otherwise.

Return values

>0	transaction identifier (positively certified). If generate_group_id is false and certification positive a 1 is returned;
0	negatively certified;
-1	error.

◆ clear_certification_info()

void Certifier::clear_certification_info ( )

private

Empties certification info.

◆ clear_incoming()

void Certifier::clear_incoming ( )

private

Clear incoming queue.

◆ clear_members()

void Certifier::clear_members ( )

private

Method to clear the members.

◆ compress_packet()

bool Certifier::compress_packet	(	ProtoCertificationInformationMap &	cert_info,
		unsigned char **	uncompresssed_buffer,
		std::vector< GR_compress * > &	compressor_list,
		GR_compress::enum_compression_type	compression_type
	)

private

This shall serialize the certification info stored in protobuf map format, and then compress provided serialized string.

The compressed payload is stored into multiple buffer containers of the output list.

Parameters

[in]	cert_info	the certification info stored in protobuf map.
[out]	uncompresssed_buffer	the buffer for uncompressed data.
[out]	compressor_list	the certification info in compressed form splitted into multiple container of list.
[in]	compression_type	the type of compression used

Returns: the operation status

Return values

false	OK
true	Error

◆ disable_conflict_detection()

void Certifier::disable_conflict_detection ( )

overridevirtual

Disables conflict detection.

Implements Certifier_interface.

◆ enable_conflict_detection()

void Certifier::enable_conflict_detection ( )

overridevirtual

Enables conflict detection.

Implements Certifier_interface.

◆ end_certification_result()

Certified_gtid Certifier::end_certification_result	(	const rpl_sidno &	gtid_server_sidno,
		const rpl_sidno &	gtid_group_sidno,
		const rpl_gno &	generated_gno,
		bool	is_gtid_specified,
		bool	local_transaction,
		const gr::Certification_result &	certification_result
	)

private

Internal helper method for ending certification, determination of final GTID values after certification according to certification result.

Parameters

[in]	gtid_server_sidno	SIDNO for transaction GTID as represented in the server (global sid map)
[in]	gtid_group_sidno	SIDNO for transaction GTID as represented in the group
[in]	generated_gno	GNO generated for the transaction
[in]	is_gtid_specified	True if GTID was specified
[in]	local_transaction	True in case this transaction originates from the this server
[in]	certification_result	Determined certification result

◆ extract_sidno()

std::tuple< rpl_sidno, rpl_sidno, rpl_sidno, mysql::utils::Return_status > Certifier::extract_sidno	(	Gtid_log_event &	gle,
		bool	is_gtid_specified,
		Gtid_set &	snapshot_gtid_set,
		Gtid_set &	group_gtid_set
	)

private

This function determines three sidnos for a specific TSID based on information obtained from the Gtid_log_event.

Parameters

gle	Gtid_log_event from which tsid will be extracted
is_gtid_specified	True in case GTID is specified
snapshot_gtid_set	Snapshot GTIDs
group_gtid_set	Current GTID set

Returns

A tuple of:

group_sidno Sidno relative to the group sid map
gtid_snapshot_sidno Sidno relative to the snapshot sid map
gtid_global_sidno Sidno relative to the global sid map
return status

We need to ensure that group sidno does exist on snapshot version due to the following scenario: 1) Member joins the group. 2) Goes through recovery procedure, view change is queued to apply, member is marked ONLINE. This requires –group_replication_recovery_complete_at=TRANSACTIONS_CERTIFIED to happen. 3) Despite the view change log event is still being applied, since the member is already ONLINE it can execute transactions. The first transaction from this member will not include any group GTID, since no group transaction is yet applied. 4) As a result of this sequence snapshot_version will not contain any group GTID and the below instruction snapshot_version->_add_gtid(group_sidno, result); would fail because of that

◆ garbage_collect()

void Certifier::garbage_collect	(	Gtid_set *	executed_gtid_set = `nullptr`,
		bool	on_member_join = `false`
	)

overridevirtual

Validates if garbage collect should run against the intersection of the received transactions stable sets.

Parameters

executed_gtid_set	intersection gtid set
on_member_join	call due to member joining

Implements Certifier_interface.

◆ garbage_collect_internal()

void Certifier::garbage_collect_internal	(	Gtid_set *	intersection_gtid_set,
		bool	preemptive = `false`
	)

private

Removes the intersection of the received transactions stable sets from certification database.

Parameters

intersection_gtid_set	intersection gtid set
preemptive	is a preemptive run

◆ generate_view_change_group_gtid()

std::pair< Gtid, mysql::utils::Return_status > Certifier::generate_view_change_group_gtid ( )

Generate group GTID for a view change log event.

Returns: Generated gtid and Gtid generation result

See also: Return_status

◆ get_certification_info()

void Certifier::get_certification_info ( std::map< std::string, std::string > * cert_info )

overridevirtual

Retrieves the current certification info.

Note: if concurrent access is introduce to these variables, locking is needed in this method

Parameters

[out] cert_info a pointer to retrieve the certification info

Implements Certifier_interface.

◆ get_certification_info_recovery_metadata()

bool Certifier::get_certification_info_recovery_metadata ( Recovery_metadata_message * recovery_metadata_message )

overridevirtual

Retrieves the current certification info.

Note: if concurrent access is introduce to these variables, locking is needed in this method

Parameters

[out] recovery_metadata_message Retrieves the metadata message

Returns: the operation status

Return values

false	OK
true	Error

Implements Certifier_interface.

◆ get_certification_info_size()

ulonglong Certifier::get_certification_info_size ( )

overridevirtual

Get method to retrieve the certification db size.

Implements Certifier_interface.

◆ get_certified_write_set_snapshot_version()

Gtid_set * Certifier::get_certified_write_set_snapshot_version ( const char * item )

private

Find the snapshot_version corresponding to an item.

Return if it exists, other wise return NULL;

Parameters

[in] item item for the snapshot version.

Return values

Gtid_set pointer if exists in the map. Otherwise 0;

◆ get_group_gtid_set() [1/2]

Gtid_set * Certifier::get_group_gtid_set ( )

private

Returns group_executed_gtid_set or group_extracted_gtid_set while certifying already applied transactions from the donor.

Returns: Pointer to the 'correct' group_gtid_set

◆ get_group_gtid_set() [2/2]

const Gtid_set * Certifier::get_group_gtid_set ( ) const

private

Returns group_executed_gtid_set or group_extracted_gtid_set while certifying already applied transactions from the donor.

Returns: Pointer to the 'correct' group_gtid_set

◆ get_group_stable_transactions_set_string()

int Certifier::get_group_stable_transactions_set_string	(	char **	buffer,
		size_t *	length
	)

overridevirtual

Returns the transactions in stable set in text format, that is, the set of transactions already applied on all group members.

Parameters

[out]	buffer	Pointer to pointer to string. The method will set it to point to the newly allocated buffer, or NULL on out of memory. Caller must free the allocated memory.
[out]	length	Length of the generated string.

Returns: the operation status

Return values

0	OK
!=0	Out of memory error

Implements Certifier_stats.

◆ get_last_conflict_free_transaction()

void Certifier::get_last_conflict_free_transaction ( std::string * value )

overridevirtual

Get method to retrieve the last conflict free transaction.

Parameters

[out] value The last conflict free transaction

Implements Certifier_stats.

◆ get_negative_certified()

ulonglong Certifier::get_negative_certified ( )

overridevirtual

Get method to retrieve the number of negatively certified transactions.

Implements Certifier_stats.

◆ get_positive_certified()

ulonglong Certifier::get_positive_certified ( )

overridevirtual

Get the number of postively certified transactions by the certifier.

Implements Certifier_stats.

◆ gtid_intervals_computation()

void Certifier::gtid_intervals_computation ( )

Compute GTID intervals.

◆ handle_certifier_data()

int Certifier::handle_certifier_data	(	const uchar *	data,
		ulong	len,
		const Gcs_member_identifier &	gcs_member_id
	)

overridevirtual

Queues the packet coming from the reader for future processing.

Parameters

[in]	data	the packet data
[in]	len	the packet length
[in]	gcs_member_id	the member_id which sent the message

Returns: the operation status

Return values

0	OK
!=0	Error on queue

Implements Certifier_interface.

◆ handle_view_change()

void Certifier::handle_view_change ( )

overridevirtual

Handle view changes on certifier.

Implements Certifier_interface.

◆ increment_parallel_applier_sequence_number()

void Certifier::increment_parallel_applier_sequence_number ( bool update_parallel_applier_last_committed_global )

private

This function updates parallel applier indexes.

It must be called for each remote transaction.

Parameters

[in] update_parallel_applier_last_committed_global If true parallel_applier_last_committed_global is updated to the current sequence number (before update sequence number).

Note: parallel_applier_last_committed_global should be updated on the following situations: 1) Transaction without write set is certified, since it represents the lowest last_committed for all future transactions; 2) After certification info garbage collection, since we do not know what write sets were purged, which may cause transactions last committed to be incorrectly computed.

◆ initialize()

int Certifier::initialize ( ulonglong gtid_assignment_block_size )

Initialize certifier.

Parameters

gtid_assignment_block_size the group gtid assignment block size

Returns: the operation status

Return values

0	OK
!=0	Error

◆ initialize_server_gtid_set()

int Certifier::initialize_server_gtid_set ( bool get_server_gtid_retrieved = false )

private

Method to initialize the group_gtid_executed gtid set with the server gtid executed set and applier retrieved gtid set values.

Parameters

get_server_gtid_retrieved add applier retrieved gtid set to group_gtid_executed gtid set

Return values

1	error during initialization
0	success

◆ initialize_server_gtid_set_after_distributed_recovery()

bool Certifier::initialize_server_gtid_set_after_distributed_recovery ( )

overridevirtual

Initializes the gtid_executed set.

Returns: the operation status

Return values

false	OK
true	Error

Implements Certifier_interface.

◆ intersect_members_gtid_executed_and_garbage_collect()

bool Certifier::intersect_members_gtid_executed_and_garbage_collect ( )

private

Computes intersection between all sets received, so that we have the already applied transactions on all servers.

Returns: the operation status

Return values

false	it did not run garbage_collect
true	it did run garbage_collect

◆ is_conflict_detection_enable()

bool Certifier::is_conflict_detection_enable ( )

overridevirtual

Check if conflict detection is enable.

Return values

True	conflict detection is enable
False	otherwise

Implements Certifier_interface.

◆ is_initialized()

bool Certifier::is_initialized ( )

inlineprivate

◆ set_certification_info()

int Certifier::set_certification_info ( std::map< std::string, std::string > * cert_info )

overridevirtual

Sets the certification info according to the given value.

Note: if concurrent access is introduce to these variables, locking is needed in this method

Parameters

[in] cert_info certification info retrieved from recovery procedure

Return values

>	0 Error during setting certification info.
=	0 Everything went fine.

Implements Certifier_interface.

◆ set_certification_info_part()

bool Certifier::set_certification_info_part	(	GR_compress::enum_compression_type	compression_type,
		const unsigned char *	buffer,
		unsigned long long	buffer_length,
		unsigned long long	uncompressed_buffer_length
	)

private

Sets the certification info according to the given value.

This shall uncompress and then convert uncompressed string into the protobuf map format storing certification info. This certification info is added to certifier's certification info.

Note: if concurrent access is introduce to these variables, locking is needed in this method

Parameters

[in]	compression_type	the compression type
[in]	buffer	the compressed certification info retrieved from recovery procedure.
[in]	buffer_length	the size of the compressed retrieved certification info.
[in]	uncompressed_buffer_length	the size of the uncompressed certification info before it was compressed.

Returns: the operation status

Return values

false	OK
true	Error

◆ set_certification_info_recovery_metadata()

bool Certifier::set_certification_info_recovery_metadata ( Recovery_metadata_message * recovery_metadata_message )

overridevirtual

The received certification info from Recovery Metadata is decoded, compressed and added to the member certification info for certification.

Note: if concurrent access is introduce to these variables, locking is needed in this method

Parameters

[in] recovery_metadata_message the pointer to Recovery_metadata_message.

Returns: the operation status

Return values

false	OK
true	Error

Implements Certifier_interface.

◆ terminate()

int Certifier::terminate ( )

Terminate certifier.

Returns: the operation status

Return values

0	OK
!=0	Error

◆ update_certified_transaction_count()

void Certifier::update_certified_transaction_count	(	bool	result,
		bool	local_transaction
	)

private

◆ update_stable_set()

Certifier::enum_update_status Certifier::update_stable_set ( const Gtid_set & set )

private

Update stable set with set if not already contained.

Parameters

set	Gtid to add to stable set

Returns: status of operation

◆ update_transaction_dependency_timestamps()

void Certifier::update_transaction_dependency_timestamps	(	Gtid_log_event &	gle,
		bool	has_write_set,
		bool	has_write_set_large_size,
		int64	transaction_last_committed
	)

private

Updates parallel applier indexes in GLE.

Parameters

gle	Gle currently processed
has_write_set	True in case transaction write set is not empty
has_write_set_large_size	True in case number of write sets in transactions is greater than group_replication_preemptive_garbage_collection_rows_threshold
transaction_last_committed	The transaction's logical timestamps used for MTS

Member Data Documentation

◆ broadcast_thread

Certifier_broadcast_thread* Certifier::broadcast_thread

private

Broadcast thread.

◆ certification_info

Certification_info Certifier::certification_info

private

Certification database.

◆ CERTIFICATION_INFO_ERROR_NAME

const std::string Certifier::CERTIFICATION_INFO_ERROR_NAME

static

Initial value:

=

"certification_info_error"

Key used to store errors in the certification info on View_change_log_event.

◆ certification_info_tsid_map

Tsid_map* Certifier::certification_info_tsid_map

private

◆ certifier_garbage_collection_block

bool Certifier::certifier_garbage_collection_block

private

◆ certifying_already_applied_transactions

bool Certifier::certifying_already_applied_transactions

private

◆ conflict_detection_enable

bool Certifier::conflict_detection_enable

private

Conflict detection is performed when: 1) group is on multi-master mode; 2) group is on single-primary mode and primary is applying relay logs with transactions from a previous primary.

◆ group_gtid_executed

Gtid_set* Certifier::group_gtid_executed

private

◆ group_gtid_extracted

Gtid_set* Certifier::group_gtid_extracted

private

A Gtid_set which contains the gtid extracted from the certification info map of the donor.

It is the set of transactions that is executed at the time of View_change_log_event at donor.

◆ group_gtid_tsid_map

Tsid_map* Certifier::group_gtid_tsid_map

private

◆ group_gtid_tsid_map_group_sidno

rpl_sidno Certifier::group_gtid_tsid_map_group_sidno

private

Variable to store the sidno used for transactions which will be logged with the group_uuid.

◆ GTID_EXTRACTED_NAME

const std::string Certifier::GTID_EXTRACTED_NAME = "gtid_extracted"

staticprivate

Key used to store group_gtid_executed on certification info on View_change_log_event.

◆ gtid_generator

gr::Gtid_generator Certifier::gtid_generator

private

Object responsible for generation of the GTIDs for transactions with gtid_next equal to AUTOMATIC (tagged/untagged)

◆ incoming

Synchronized_queue<Data_packet *>* Certifier::incoming

private

◆ initialized

std::atomic<bool> Certifier::initialized {false}

private

Is certifier initialized.

◆ is_first_remote_transaction_certified

bool Certifier::is_first_remote_transaction_certified {true}

private

◆ last_conflict_free_transaction

Gtid Certifier::last_conflict_free_transaction

private

Last conflict free transaction identification.

◆ LOCK_certification_info

mysql_mutex_t Certifier::LOCK_certification_info

private

◆ LOCK_members

mysql_mutex_t Certifier::LOCK_members

private

◆ members

std::vector<std::string> Certifier::members

private

◆ negative_cert

ulonglong Certifier::negative_cert

private

◆ parallel_applier_last_committed_global

int64 Certifier::parallel_applier_last_committed_global

private

◆ parallel_applier_sequence_number

int64 Certifier::parallel_applier_sequence_number

private

◆ positive_cert

ulonglong Certifier::positive_cert

private

◆ same_member_message_discarded

bool Certifier::same_member_message_discarded

private

◆ stable_gtid_set

Gtid_set* Certifier::stable_gtid_set

private

◆ stable_gtid_set_lock

Checkable_rwlock* Certifier::stable_gtid_set_lock

private

Stable set and garbage collector variables.

◆ stable_tsid_map

Tsid_map* Certifier::stable_tsid_map

private

◆ views_sidno_group_representation

rpl_sidno Certifier::views_sidno_group_representation

private

The sidno used for view log events as seen by the group sid map.

◆ views_sidno_server_representation

rpl_sidno Certifier::views_sidno_server_representation

private

The sidno used for view log events as seen by the server sid map.

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

plugin/group_replication/include/certifier.h
plugin/group_replication/src/certifier.cc

Public Types

Public Member Functions

Static Public Attributes

Private Types

Private Member Functions

Private Attributes

Static Private Attributes

Member Typedef Documentation

◆ Certification_info

◆ ProtoCertificationInformationMap

Member Enumeration Documentation

◆ enum_update_status

Constructor & Destructor Documentation

◆ Certifier()

◆ ~Certifier()

Member Function Documentation

◆ add_gtid_to_group_gtid_executed()

◆ add_item()

◆ add_to_group_gtid_executed_internal()

◆ add_writeset_to_certification_info()

◆ certify()

◆ clear_certification_info()

◆ clear_incoming()

◆ clear_members()

◆ compress_packet()

◆ disable_conflict_detection()

◆ enable_conflict_detection()

◆ end_certification_result()

◆ extract_sidno()

◆ garbage_collect()

◆ garbage_collect_internal()

◆ generate_view_change_group_gtid()

◆ get_certification_info()

◆ get_certification_info_recovery_metadata()

◆ get_certification_info_size()

◆ get_certified_write_set_snapshot_version()

◆ get_group_gtid_set() [1/2]

◆ get_group_gtid_set() [2/2]

◆ get_group_stable_transactions_set_string()

◆ get_last_conflict_free_transaction()

◆ get_negative_certified()

◆ get_positive_certified()

◆ gtid_intervals_computation()

◆ handle_certifier_data()

◆ handle_view_change()

◆ increment_parallel_applier_sequence_number()

◆ initialize()

◆ initialize_server_gtid_set()

◆ initialize_server_gtid_set_after_distributed_recovery()

◆ intersect_members_gtid_executed_and_garbage_collect()

◆ is_conflict_detection_enable()

◆ is_initialized()

◆ set_certification_info()

◆ set_certification_info_part()

◆ set_certification_info_recovery_metadata()

◆ terminate()

◆ update_certified_transaction_count()

◆ update_stable_set()

◆ update_transaction_dependency_timestamps()

Member Data Documentation

◆ broadcast_thread

◆ certification_info

◆ CERTIFICATION_INFO_ERROR_NAME

◆ certification_info_tsid_map

◆ certifier_garbage_collection_block

◆ certifying_already_applied_transactions

◆ conflict_detection_enable

◆ group_gtid_executed

◆ group_gtid_extracted

◆ group_gtid_tsid_map

◆ group_gtid_tsid_map_group_sidno

◆ GTID_EXTRACTED_NAME

◆ gtid_generator

◆ incoming

◆ initialized

◆ is_first_remote_transaction_certified

◆ last_conflict_free_transaction

◆ LOCK_certification_info

◆ LOCK_members

◆ members