mysqlctl

package
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 Go to latest Published: Feb 14, 2015 License: BSD-3-Clause Imports: 45 Imported by: 0

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Index

Constants

View Source 
const (
	SnapshotManifestFile = "snapshot_manifest.json"
	SnapshotURLPath      = "/snapshot"
)
View Source 
const (
	// BINLOG_CHECKSUM_ALG_OFF indicates that checksums are supported but off.
	BINLOG_CHECKSUM_ALG_OFF = 0
	// BINLOG_CHECKSUM_ALG_UNDEF indicates that checksums are not supported.
	BINLOG_CHECKSUM_ALG_UNDEF = 255
)
View Source 
const (
	// MysqlWaitTime is the default number of seconds to wait for mysql
	MysqlWaitTime = 120 * time.Second
)
View Source 
const (
	SlaveStartDeadline = 30
)

Variables

View Source 
var (
	ErrNotSlave  = errors.New("no slave status")
	ErrNotMaster = errors.New("no master status")
)

Functions

func ConcurrentMap 

func ConcurrentMap(concurrency, n int, fun MapFunc) error

ConcurrentMap applies fun in a concurrent manner on integers from 0 to n-1 (they are assumed to be indexes of some slice containing items to be processed). The first error returned by a fun application will returned (subsequent errors will only be logged). It will use concurrency goroutines.

func MySQLReplicationLag 

func MySQLReplicationLag(mysqld *Mysqld) health.Reporter

MySQLReplicationLag lag returns a reporter that reports the MySQL replication lag.

func NewGoogleBinlogEvent 

func NewGoogleBinlogEvent(buf []byte) blproto.BinlogEvent

func NewMariadbBinlogEvent 

func NewMariadbBinlogEvent(buf []byte) blproto.BinlogEvent

func RegisterFlags 

func RegisterFlags()

RegisterFlags registers the command line flags for specifying the values of a mycnf config file. See NewMycnfFromFlags to get the supported modes.

func SnapshotDir 

func SnapshotDir(uid uint32) string

SnapshotDir returns the default directory for a tablet's snapshots

func TabletDir 

func TabletDir(uid uint32) string

TabletDir returns the default directory for a tablet

func TopLevelDirs 

func TopLevelDirs() []string

TopLevelDirs returns the list of directories in the toplevel tablet directory that might be located in a different place.

Types

type FakeMysqlDaemon 

type FakeMysqlDaemon struct {
	// MasterAddr will be returned by GetMasterAddr(). Set to "" to return
	// ErrNotSlave, or to "ERROR" to return an error.
	MasterAddr string

	// MysqlPort will be returned by GetMysqlPort(). Set to -1 to
	// return an error.
	MysqlPort int

	// Replicating is updated when calling StopSlave
	Replicating bool

	// CurrentSlaveStatus is returned by SlaveStatus
	CurrentSlaveStatus *proto.ReplicationStatus

	// Schema that will be returned by GetSchema. If nil we'll
	// return an error.
	Schema *proto.SchemaDefinition

	// DbaConnectionFactory is the factory for making fake dba connections
	DbaConnectionFactory func() (dbconnpool.PoolConnection, error)

	// DbAppConnectionFactory is the factory for making fake db app connections
	DbAppConnectionFactory func() (dbconnpool.PoolConnection, error)
}

FakeMysqlDaemon implements MysqlDaemon and allows the user to fake everything.

func (*FakeMysqlDaemon) GetDbConnection 

func (fmd *FakeMysqlDaemon) GetDbConnection(dbconfigName dbconfigs.DbConfigName) (dbconnpool.PoolConnection, error)

GetDbConnection is part of the MysqlDaemon interface

func (*FakeMysqlDaemon) GetMasterAddr 

func (fmd *FakeMysqlDaemon) GetMasterAddr() (string, error)

GetMasterAddr is part of the MysqlDaemon interface

func (*FakeMysqlDaemon) GetMysqlPort 

func (fmd *FakeMysqlDaemon) GetMysqlPort() (int, error)

GetMysqlPort is part of the MysqlDaemon interface

func (*FakeMysqlDaemon) GetSchema 

func (fmd *FakeMysqlDaemon) GetSchema(dbName string, tables, excludeTables []string, includeViews bool) (*proto.SchemaDefinition, error)

GetSchema is part of the MysqlDaemon interface

func (*FakeMysqlDaemon) SlaveStatus 

func (fmd *FakeMysqlDaemon) SlaveStatus() (*proto.ReplicationStatus, error)

SlaveStatus is part of the MysqlDaemon interface

func (*FakeMysqlDaemon) StartSlave 

func (fmd *FakeMysqlDaemon) StartSlave(hookExtraEnv map[string]string) error

StartSlave is part of the MysqlDaemon interface

func (*FakeMysqlDaemon) StopSlave 

func (fmd *FakeMysqlDaemon) StopSlave(hookExtraEnv map[string]string) error

StopSlave is part of the MysqlDaemon interface

type MapFunc 

type MapFunc func(index int) error

type Mycnf 

type Mycnf struct {
	// ServerId is the unique id for this server.
	// Used to create a bunch of named directories.
	ServerId uint32

	// MysqlPort is the port for the MySQL server running on this machine.
	// It is mainly used to communicate with topology server.
	MysqlPort int

	// DataDir is where the table files are
	// (used by vt software for Clone)
	DataDir string

	// InnodbDataHomeDir is the data directory for innodb.
	// (used by vt software for Clone)
	InnodbDataHomeDir string

	// InnodbLogGroupHomeDir is the logs directory for innodb.
	// (used by vt software for Clone)
	InnodbLogGroupHomeDir string

	// SocketFile is the path to the local mysql.sock file.
	// (used by vt software to check server is running)
	SocketFile string

	// ErrorLogPath is the path to store error logs at.
	// (unused by vt software for now)
	ErrorLogPath string

	// SlowLogPath is the slow query log path
	// (unused by vt software for now)
	SlowLogPath string

	// RelayLogPath is the path of the relay logs
	// (unused by vt software for now)
	RelayLogPath string

	// RelayLogIndexPath is the file name for the relay log index
	// (unused by vt software for now)
	RelayLogIndexPath string

	// RelayLogInfoPath is the file name for the relay log info file
	// (unused by vt software for now)
	RelayLogInfoPath string

	// BinLogPath is the base path for binlogs
	// (used by vt software for binlog streaming and rowcache invalidation)
	BinLogPath string

	// MasterInfoFile is the master.info file location.
	// (unused by vt software for now)
	MasterInfoFile string

	// PidFile is the mysql.pid file location
	// (used by vt software to check server is running)
	PidFile string

	// TmpDir is where to create temporary tables
	// (unused by vt software for now)
	TmpDir string

	// SlaveLoadTmpDir is where to create tmp files for replication
	// (unused by vt software for now)
	SlaveLoadTmpDir string
	// contains filtered or unexported fields
}

Mycnf is a memory structure that contains a bunch of interesting parameters to start mysqld. It can be used to generate standard my.cnf files from a server id and mysql port. It can also be populated from an existing my.cnf, or by command line parameters. command line parameters.

func NewMycnf 

func NewMycnf(uid uint32, mysqlPort int) *Mycnf

NewMycnf fills the Mycnf structure with vt root paths and derived values. This is used to fill out the cnfTemplate values and generate my.cnf. uid is a unique id for a particular tablet - it must be unique within the tabletservers deployed within a keyspace, lest there be collisions on disk. mysqldPort needs to be unique per instance per machine.

func NewMycnfFromFlags 

func NewMycnfFromFlags(uid uint32) (mycnf *Mycnf, err error)

NewMycnfFromFlags creates a Mycnf object from the command line flags.

Multiple modes are supported:

  • at least mycnf_server_id is set on the command line --> then we read all parameters from the command line, and not from any my.cnf file.
  • mycnf_server_id is not passed in, but mycnf-file is passed in --> then we read that mycnf file
  • mycnf_server_id and mycnf-file are not passed in: --> then we use the default location of the my.cnf file for the provided uid and read that my.cnf file.

RegisterCommandLineFlags should have been called before calling this, otherwise we'll panic.

func ReadMycnf 

func ReadMycnf(cnfFile string) (mycnf *Mycnf, err error)

ReadMycnf will read an existing my.cnf from disk, and create a Mycnf object.

type MysqlDaemon 

type MysqlDaemon interface {
	// GetMasterAddr returns the mysql master address, as shown by
	// 'show slave status'.
	GetMasterAddr() (string, error)

	// GetMysqlPort returns the current port mysql is listening on.
	GetMysqlPort() (int, error)

	// replication related methods
	StartSlave(hookExtraEnv map[string]string) error
	StopSlave(hookExtraEnv map[string]string) error
	SlaveStatus() (*proto.ReplicationStatus, error)

	// Schema related methods
	GetSchema(dbName string, tables, excludeTables []string, includeViews bool) (*proto.SchemaDefinition, error)

	// GetDbConnection returns a connection to be able to talk to the database.
	// It accepts a dbconfig name to determine which db user it the connection should have.
	GetDbConnection(dbconfigName dbconfigs.DbConfigName) (dbconnpool.PoolConnection, error)
}

MysqlDaemon is the interface we use for abstracting Mysqld.

type MysqlFlavor 

type MysqlFlavor interface {
	// VersionMatch returns true if the version string (from SELECT VERSION())
	// represents a server that this flavor knows how to talk to.
	VersionMatch(version string) bool

	// MasterPosition returns the ReplicationPosition of a master.
	MasterPosition(mysqld *Mysqld) (proto.ReplicationPosition, error)

	// SlaveStatus returns the ReplicationStatus of a slave.
	SlaveStatus(mysqld *Mysqld) (*proto.ReplicationStatus, error)

	// PromoteSlaveCommands returns the commands to run to change
	// a slave into a master.
	PromoteSlaveCommands() []string

	// StartReplicationCommands returns the commands to start replicating from
	// a given master and position as specified in a ReplicationStatus.
	StartReplicationCommands(params *mysql.ConnectionParams, status *proto.ReplicationStatus) ([]string, error)

	// ParseGTID parses a GTID in the canonical format of this MySQL flavor into
	// a proto.GTID interface value.
	ParseGTID(string) (proto.GTID, error)

	// ParseReplicationPosition parses a replication position in the canonical
	// format of this MySQL flavor into a proto.ReplicationPosition struct.
	ParseReplicationPosition(string) (proto.ReplicationPosition, error)

	// SendBinlogDumpCommand sends the flavor-specific version of the
	// COM_BINLOG_DUMP command to start dumping raw binlog events over a slave
	// connection, starting at a given GTID.
	SendBinlogDumpCommand(mysqld *Mysqld, conn *SlaveConnection, startPos proto.ReplicationPosition) error

	// MakeBinlogEvent takes a raw packet from the MySQL binlog stream connection
	// and returns a BinlogEvent through which the packet can be examined.
	MakeBinlogEvent(buf []byte) blproto.BinlogEvent

	// WaitMasterPos waits until slave replication reaches at least targetPos.
	WaitMasterPos(mysqld *Mysqld, targetPos proto.ReplicationPosition, waitTimeout time.Duration) error

	// EnableBinlogPlayback prepares the server to play back events from a binlog stream.
	// Whatever it does for a given flavor, it must be idempotent.
	EnableBinlogPlayback(mysqld *Mysqld) error

	// DisableBinlogPlayback returns the server to the normal state after playback is done.
	// Whatever it does for a given flavor, it must be idempotent.
	DisableBinlogPlayback(mysqld *Mysqld) error
}

MysqlFlavor is the abstract interface for a flavor.

type Mysqld 

type Mysqld struct {
	TabletDir   string
	SnapshotDir string
	// contains filtered or unexported fields
}

Mysqld is the object that represents a mysqld daemon running on this server.

func NewMysqld 

func NewMysqld(dbaName, appName string, config *Mycnf, dba, app, repl *mysql.ConnectionParams) *Mysqld

NewMysqld creates a Mysqld object based on the provided configuration and connection parameters. dbaName and appName are the base for stats exports, use 'Dba' and 'App', except in tests

func (*Mysqld) Addr 

func (mysqld *Mysqld) Addr() string

Addr returns the fully qualified host name + port for this instance.

func (*Mysqld) ApplySchemaChange 

func (mysqld *Mysqld) ApplySchemaChange(dbName string, change *proto.SchemaChange) (*proto.SchemaChangeResult, error)

ApplySchemaChange will apply the schema change to the given database.

func (*Mysqld) BinlogInfo 

func (mysqld *Mysqld) BinlogInfo(pos proto.ReplicationPosition) (fileName string, filePos uint, err error)
mysql> SHOW BINLOG INFO FOR 5\G
*************************** 1. row ***************************
Log_name: vt-0000041983-bin.000001
Pos: 1194
Server_ID: 41983

BinlogInfo returns the filename and position for a Google MySQL group_id. This command only exists in Google MySQL.

func (*Mysqld) BreakSlaves 

func (mysqld *Mysqld) BreakSlaves() error

Force all slaves to error and stop. This is extreme, but helpful for emergencies and tests. Insert a row, block the propagation of its subsequent delete and reinsert it. This forces a failure on slaves only.

func (*Mysqld) CheckReplication 

func (mysqld *Mysqld) CheckReplication(timeCheck int64) error

CheckReplication checks for the magic row inserted under controlled reparenting.

func (*Mysqld) Close 

func (mysqld *Mysqld) Close()

Close will close this instance of Mysqld. It will wait for all dba queries to be finished.

func (*Mysqld) Cnf 

func (mysqld *Mysqld) Cnf() *Mycnf

Cnf returns the mysql config for the daemon

func (*Mysqld) CreateSnapshot 

func (mysqld *Mysqld) CreateSnapshot(logger logutil.Logger, dbName, sourceAddr string, allowHierarchicalReplication bool, concurrency int, serverMode bool, hookExtraEnv map[string]string) (snapshotManifestUrlPath string, slaveStartRequired, readOnly bool, err error)

This function runs on the machine acting as the source for the clone.

Check master/slave status and determine restore needs. If this instance is a slave, stop replication, otherwise place in read-only mode. Record replication position. Shutdown mysql Check paths for storing data

Depending on the serverMode flag, we do the following: serverMode = false: 

Compress /vt/vt_[0-9a-f]+/data/vt_.+
Compute hash (of compressed files, as we serve .gz files here)
Place in /vt/clone_src where they will be served by http server (not rpc)
Restart mysql

serverMode = true: 

Make symlinks for /vt/vt_[0-9a-f]+/data/vt_.+ to innodb files
Compute hash (of uncompressed files, as we serve uncompressed files)
Place symlinks in /vt/clone_src where they will be served by http server
Leave mysql stopped, return slaveStartRequired, readOnly

func (*Mysqld) DemoteMaster 

func (mysqld *Mysqld) DemoteMaster() (rp proto.ReplicationPosition, err error)

DemoteMaster will gracefully demote a master mysql instance to read only. If the master is still alive, then we need to demote it gracefully make it read-only, flush the writes and get the position

func (*Mysqld) DisableBinlogPlayback 

func (mysqld *Mysqld) DisableBinlogPlayback() error

DisableBinlogPlayback returns the server to the normal state after streaming. Whatever it does for a given flavor, it must be idempotent.

func (*Mysqld) EnableBinlogPlayback 

func (mysqld *Mysqld) EnableBinlogPlayback() error

EnableBinlogPlayback prepares the server to play back events from a binlog stream. Whatever it does for a given flavor, it must be idempotent.

func (*Mysqld) ExecuteMysqlCommand 

func (mysqld *Mysqld) ExecuteMysqlCommand(sql string) error

ExecuteMysqlCommand executes some SQL commands using a mysql command line interface process

func (*Mysqld) ExecuteSuperQuery 

func (mysqld *Mysqld) ExecuteSuperQuery(query string) error

ExecuteSuperQuery allows the user to execute a query as a super user.

func (*Mysqld) ExecuteSuperQueryList 

func (mysqld *Mysqld) ExecuteSuperQueryList(queryList []string) error

ExecuteSuperQueryList alows the user to execute queries as a super user.

func (*Mysqld) FindSlaves 

func (mysqld *Mysqld) FindSlaves() ([]string, error)

Get IP addresses for all currently connected slaves.

func (*Mysqld) FindVtDatabases 

func (mysqld *Mysqld) FindVtDatabases() ([]string, error)

func (*Mysqld) GetColumns 

func (mysqld *Mysqld) GetColumns(dbName, table string) ([]string, error)

GetColumns returns the columns of table.

func (*Mysqld) GetDbConnection 

func (mysqld *Mysqld) GetDbConnection(dbconfigName dbconfigs.DbConfigName) (dbconnpool.PoolConnection, error)

GetDbConnection returns a connection from the pool chosen by dbconfigName. Recycle needs to be called on the result.

func (*Mysqld) GetMasterAddr 

func (mysqld *Mysqld) GetMasterAddr() (string, error)

func (*Mysqld) GetMysqlPort 

func (mysqld *Mysqld) GetMysqlPort() (int, error)

func (*Mysqld) GetPermissions 

func (mysqld *Mysqld) GetPermissions() (*proto.Permissions, error)

func (*Mysqld) GetPrimaryKeyColumns 

func (mysqld *Mysqld) GetPrimaryKeyColumns(dbName, table string) ([]string, error)

GetPrimaryKeyColumns returns the primary key columns of table.

func (*Mysqld) GetSchema 

func (mysqld *Mysqld) GetSchema(dbName string, tables, excludeTables []string, includeViews bool) (*proto.SchemaDefinition, error)

GetSchema returns the schema for database for tables listed in tables. If tables is empty, return the schema for all tables.

func (*Mysqld) IPAddr 

func (mysqld *Mysqld) IPAddr() string

IPAddr returns the IP address for this instance

func (*Mysqld) Init 

func (mysqld *Mysqld) Init(mysqlWaitTime time.Duration, bootstrapArchive string, skipSchema bool) error

Init will create the default directory structure for the mysqld process, generate / configure a my.cnf file, unpack a skeleton database, and create some management tables.

func (*Mysqld) IsReadOnly 

func (mysqld *Mysqld) IsReadOnly() (bool, error)

func (*Mysqld) MasterPosition 

func (mysqld *Mysqld) MasterPosition() (rp proto.ReplicationPosition, err error)

func (*Mysqld) OnTerm 

func (mysqld *Mysqld) OnTerm(f func())

OnTerm registers a function to be called if mysqld terminates for any reason other than a call to Mysqld.Shutdown(). This only works if mysqld was actually started by calling Start() on this Mysqld instance.

func (*Mysqld) PreflightSchemaChange 

func (mysqld *Mysqld) PreflightSchemaChange(dbName string, change string) (*proto.SchemaChangeResult, error)

PreflightSchemaChange will apply the schema change to a fake database that has the same schema as the target database, see if it works.

func (*Mysqld) PromoteSlave 

func (mysqld *Mysqld) PromoteSlave(setReadWrite bool, hookExtraEnv map[string]string) (replicationStatus *proto.ReplicationStatus, waitPosition proto.ReplicationPosition, timePromoted int64, err error)

PromoteSlave will promote a mysql slave to master. setReadWrite: set the new master in read-write mode.

replicationState: info slaves need to reparent themselves waitPosition: slaves can wait for this position when restarting replication timePromoted: this timestamp (unix nanoseconds) is inserted into _vt.replication_log to verify the replication config

func (*Mysqld) ReparentPosition 

func (mysqld *Mysqld) ReparentPosition(slavePosition proto.ReplicationPosition) (rs *proto.ReplicationStatus, waitPosition proto.ReplicationPosition, reparentTime int64, err error)

Return a replication state that will reparent a slave to the correct master for a specified position.

func (*Mysqld) ResolveTables 

func (mysqld *Mysqld) ResolveTables(dbName string, tables []string) ([]string, error)

ResolveTables returns a list of actual tables+views matching a list of regexps

func (*Mysqld) RestartSlave 

func (mysqld *Mysqld) RestartSlave(replicationStatus *proto.ReplicationStatus, waitPosition proto.ReplicationPosition, timeCheck int64) error

RestartSlave tells a mysql slave that is has a new master

func (*Mysqld) RestoreFromSnapshot 

func (mysqld *Mysqld) RestoreFromSnapshot(logger logutil.Logger, snapshotManifest *SnapshotManifest, fetchConcurrency, fetchRetryCount int, dontWaitForSlaveStart bool, hookExtraEnv map[string]string) error

This piece runs on the presumably empty machine acting as the target in the create replica action.

validate target (self) shutdown_mysql() create temp data directory /vt/target/vt_<keyspace> copy compressed data files via HTTP verify hash of compressed files uncompress into /vt/vt_<target-uid>/data/vt_<keyspace> start_mysql() clean up compressed files

func (*Mysqld) SetReadOnly 

func (mysqld *Mysqld) SetReadOnly(on bool) error

func (*Mysqld) Shutdown 

func (mysqld *Mysqld) Shutdown(waitForMysqld bool, mysqlWaitTime time.Duration) error

Shutdown will stop the mysqld daemon that is running in the background.

waitForMysqld: should the function block until mysqld has stopped? This can actually take a *long* time if the buffer cache needs to be fully flushed - on the order of 20-30 minutes.

If a mysqlctld address is provided in a flag, Shutdown will run remotely.

func (*Mysqld) SlaveStatus 

func (mysqld *Mysqld) SlaveStatus() (*proto.ReplicationStatus, error)

func (*Mysqld) SnapshotSourceEnd 

func (mysqld *Mysqld) SnapshotSourceEnd(slaveStartRequired, readOnly, deleteSnapshot bool, hookExtraEnv map[string]string) error

func (*Mysqld) Start 

func (mysqld *Mysqld) Start(mysqlWaitTime time.Duration) error

Start will start the mysql daemon, either by running the 'mysqld_start' hook, or by running mysqld_safe in the background. If a mysqlctld address is provided in a flag, Start will run remotely.

func (*Mysqld) StartReplicationCommands 

func (mysqld *Mysqld) StartReplicationCommands(status *proto.ReplicationStatus) ([]string, error)

func (*Mysqld) StartSlave 

func (mysqld *Mysqld) StartSlave(hookExtraEnv map[string]string) error

func (*Mysqld) StopSlave 

func (mysqld *Mysqld) StopSlave(hookExtraEnv map[string]string) error

func (*Mysqld) Teardown 

func (mysqld *Mysqld) Teardown(force bool) error

Teardown will shutdown the running daemon, and delete the root directory.

func (*Mysqld) ValidateCloneTarget 

func (mysqld *Mysqld) ValidateCloneTarget(hookExtraEnv map[string]string) error

func (*Mysqld) ValidateSnapshotPath 

func (mysqld *Mysqld) ValidateSnapshotPath() error

Helper function to make sure we can write to the local snapshot area, before we actually do any action (can be used for both partial and full snapshots)

func (*Mysqld) WaitBlpPosition 

func (mysqld *Mysqld) WaitBlpPosition(bp *blproto.BlpPosition, waitTimeout time.Duration) error

WaitBlpPosition will wait for the filtered replication to reach at least the provided position.

func (*Mysqld) WaitForSlave 

func (mysqld *Mysqld) WaitForSlave(maxLag int) (err error)

func (*Mysqld) WaitForSlaveStart 

func (mysqld *Mysqld) WaitForSlaveStart(slaveStartDeadline int) error

func (*Mysqld) WaitMasterPos 

func (mysqld *Mysqld) WaitMasterPos(targetPos proto.ReplicationPosition, waitTimeout time.Duration) error

type SlaveConnection 

type SlaveConnection struct {
	*mysql.Connection
	// contains filtered or unexported fields
}

SlaveConnection represents a connection to mysqld that pretends to be a slave connecting for replication. Each such connection must identify itself to mysqld with a server ID that is unique both among other SlaveConnections and among actual slaves in the topology.

func NewSlaveConnection 

func NewSlaveConnection(mysqld *Mysqld) (*SlaveConnection, error)

NewSlaveConnection creates a new slave connection to the mysqld instance. It uses a pools.IDPool to ensure that the server IDs used to connect are unique within this process. This is done with the assumptions that:

  1. No other processes are making fake slave connections to our mysqld.
  2. No real slave servers will have IDs in the range 1-N where N is the peak number of concurrent fake slave connections we will ever make.

func (*SlaveConnection) Close 

func (sc *SlaveConnection) Close()

Close closes the slave connection, which also signals an ongoing dump started with StartBinlogDump() to stop and close its BinlogEvent channel. The ID for the slave connection is recycled back into the pool.

func (*SlaveConnection) StartBinlogDump 

func (sc *SlaveConnection) StartBinlogDump(startPos proto.ReplicationPosition) (<-chan blproto.BinlogEvent, error)

StartBinlogDump requests a replication binlog dump from the master mysqld and then immediately returns a channel on which received binlog events will be sent. The stream will continue, waiting for new events if necessary, until the connection is closed, either by the master or by calling SlaveConnection.Close(). At that point, the channel will also be closed.

type SnapshotFile 

type SnapshotFile struct {
	Path      string
	Size      int64
	Hash      string
	TableName string
}

SnapshotFile describes a file to serve. 'Path' is the path component of the URL. SnapshotManifest.Addr is the host+port component of the URL. If path ends in '.gz', it is compressed. Size and Hash are computed on the Path itself if TableName is set, this file belongs to that table

type SnapshotFiles 

type SnapshotFiles []SnapshotFile

func (SnapshotFiles) Len 

func (s SnapshotFiles) Len() int

sort.Interface we sort by descending file size

func (SnapshotFiles) Less 

func (s SnapshotFiles) Less(i, j int) bool

func (SnapshotFiles) Swap 

func (s SnapshotFiles) Swap(i, j int)

type SnapshotManifest 

type SnapshotManifest struct {
	Addr string // this is the address of the tabletserver, not mysql

	DbName string
	Files  SnapshotFiles

	ReplicationStatus *proto.ReplicationStatus
	MasterPosition    proto.ReplicationPosition
}

a SnapshotManifest describes multiple SnapshotFiles and where to get them from.

func ReadSnapshotManifest 

func ReadSnapshotManifest(filename string) (*SnapshotManifest, error)

type SplitStrategy 

type SplitStrategy struct {
	// PopulateBlpCheckpoint will drive the population of the blp_checkpoint table
	PopulateBlpCheckpoint bool

	// DontStartBinlogPlayer will delay starting the binlog replication
	DontStartBinlogPlayer bool

	// SkipSetSourceShards will not set the source shards at the end of restore
	SkipSetSourceShards bool
}

SplitStrategy is the configuration for a split clone.

func NewSplitStrategy 

func NewSplitStrategy(logger logutil.Logger, argsStr string) (*SplitStrategy, error)

func (*SplitStrategy) String 

func (strategy *SplitStrategy) String() string

Source Files

View all Source files

Directories

Path Synopsis
Package gorpcmysqlctlclient contains the go rpc version of the mysqlctl client protocol.
 Package gorpcmysqlctlclient contains the go rpc version of the mysqlctl client protocol.
Package gorpcmysqlctlserver contains the Go RPC implementation of the server side of the remote execution of mysqlctl commands.
 Package gorpcmysqlctlserver contains the Go RPC implementation of the server side of the remote execution of mysqlctl commands.
Package mysqlctlclient contains the generic client side of the remote mysqlctl protocol.
 Package mysqlctlclient contains the generic client side of the remote mysqlctl protocol.

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