cluster

package
v0.9.2 Latest Latest
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 Go to latest Published: Jul 24, 2015 License: MIT Imports: 21 Imported by: 0

Documentation

Index

Constants

View Source 
const (
	// DefaultWriteTimeout is the default timeout for a complete write to succeed.
	DefaultWriteTimeout = 5 * time.Second

	// DefaultShardWriterTimeout is the default timeout set on shard writers.
	DefaultShardWriterTimeout = 5 * time.Second
)
View Source 
const (
	MAX_MAP_RESPONSE_SIZE = 1024 * 1024 * 1024
)
View Source 
const MaxMessageSize = 1024 * 1024 * 1024 // 1GB

MaxMessageSize defines how large a message can be before we reject it

View Source 
const MuxHeader = 2

MuxHeader is the header byte used in the TCP mux.

Variables

View Source 
var (
	// ErrTimeout is returned when a write times out.
	ErrTimeout = errors.New("timeout")

	// ErrPartialWrite is returned when a write partially succeeds but does
	// not meet the requested consistency level.
	ErrPartialWrite = errors.New("partial write")

	// ErrWriteFailed is returned when no writes succeeded.
	ErrWriteFailed = errors.New("write failed")

	// ErrInvalidConsistencyLevel is returned when parsing the string version
	// of a consistency level.
	ErrInvalidConsistencyLevel = errors.New("invalid consistency level")
)

Functions

func ReadTLV added in v0.9.0 

func ReadTLV(r io.Reader) (byte, []byte, error)

ReadTLV reads a type-length-value record from r.

func WriteTLV added in v0.9.0 

func WriteTLV(w io.Writer, typ byte, buf []byte) error

WriteTLV writes a type-length-value record to w.

Types

type Config added in v0.9.0 

type Config struct {
	WriteTimeout       toml.Duration `toml:"write-timeout"`
	ShardWriterTimeout toml.Duration `toml:"shard-writer-timeout"`
}

Config represents the configuration for the the clustering service.

func NewConfig added in v0.9.0 

func NewConfig() Config

NewConfig returns an instance of Config with defaults.

type ConsistencyLevel added in v0.9.0 

type ConsistencyLevel int

ConsistencyLevel represent a required replication criteria before a write can be returned as successful 

const (
	// ConsistencyLevelAny allows for hinted hand off, potentially no write happened yet
	ConsistencyLevelAny ConsistencyLevel = iota

	// ConsistencyLevelOne requires at least one data node acknowledged a write
	ConsistencyLevelOne

	// ConsistencyLevelOne requires a quorum of data nodes to acknowledge a write
	ConsistencyLevelQuorum

	// ConsistencyLevelAll requires all data nodes to acknowledge a write
	ConsistencyLevelAll
)

func ParseConsistencyLevel added in v0.9.0 

func ParseConsistencyLevel(level string) (ConsistencyLevel, error)

type PointsWriter added in v0.9.0 

type PointsWriter struct {
	WriteTimeout time.Duration
	Logger       *log.Logger

	MetaStore interface {
		NodeID() uint64
		Database(name string) (di *meta.DatabaseInfo, err error)
		RetentionPolicy(database, policy string) (*meta.RetentionPolicyInfo, error)
		CreateShardGroupIfNotExists(database, policy string, timestamp time.Time) (*meta.ShardGroupInfo, error)
		ShardOwner(shardID uint64) (string, string, *meta.ShardGroupInfo)
	}

	TSDBStore interface {
		CreateShard(database, retentionPolicy string, shardID uint64) error
		WriteToShard(shardID uint64, points []tsdb.Point) error
	}

	ShardWriter interface {
		WriteShard(shardID, ownerID uint64, points []tsdb.Point) error
	}

	HintedHandoff interface {
		WriteShard(shardID, ownerID uint64, points []tsdb.Point) error
	}
	// contains filtered or unexported fields
}

PointsWriter handles writes across multiple local and remote data nodes.

func NewPointsWriter added in v0.9.0 

func NewPointsWriter() *PointsWriter

NewPointsWriter returns a new instance of PointsWriter for a node.

func (*PointsWriter) Close added in v0.9.0 

func (w *PointsWriter) Close() error

func (*PointsWriter) MapShards added in v0.9.0 

func (w *PointsWriter) MapShards(wp *WritePointsRequest) (*ShardMapping, error)

MapShards maps the points contained in wp to a ShardMapping. If a point maps to a shard group or shard that does not currently exist, it will be created before returning the mapping.

func (*PointsWriter) Open added in v0.9.0 

func (w *PointsWriter) Open() error

func (*PointsWriter) WritePoints added in v0.9.0 

func (w *PointsWriter) WritePoints(p *WritePointsRequest) error

WritePoints writes across multiple local and remote data nodes according the consistency level.

type RemoteMapper added in v0.9.2 

type RemoteMapper struct {
	MetaStore interface {
		Node(id uint64) (ni *meta.NodeInfo, err error)
	}
	// contains filtered or unexported fields
}

RemoteMapper implements the tsdb.Mapper interface. It connects to a remote node, sends a query, and interprets the stream of data that comes back.

func NewRemoteMaper added in v0.9.2 

func NewRemoteMaper(nodeID, shardID uint64, stmt string, chunkSize int) *RemoteMapper

NewRemoteMaper returns a new remote mapper.

func (*RemoteMapper) Close added in v0.9.2 

func (r *RemoteMapper) Close()

Close the response body

func (*RemoteMapper) NextChunk added in v0.9.2 

func (r *RemoteMapper) NextChunk() (interface{}, error)

NextChunk returns the next chunk read from the remote node to the client.

func (*RemoteMapper) Open added in v0.9.2 

func (r *RemoteMapper) Open() error

Open connects to the remote node and starts receiving data.

func (*RemoteMapper) TagSets added in v0.9.2 

func (r *RemoteMapper) TagSets() []string

type Service added in v0.9.0 

type Service struct {
	Listener net.Listener

	MetaStore interface {
		ShardOwner(shardID uint64) (string, string, *meta.ShardGroupInfo)
	}

	TSDBStore interface {
		CreateShard(database, policy string, shardID uint64) error
		WriteToShard(shardID uint64, points []tsdb.Point) error
	}

	Logger *log.Logger
	// contains filtered or unexported fields
}

Service processes data received over raw TCP connections.

func NewService added in v0.9.0 

func NewService(c Config) *Service

NewService returns a new instance of Service.

func (*Service) Close added in v0.9.0 

func (s *Service) Close() error

Close shuts down the listener and waits for all connections to finish.

func (*Service) Open added in v0.9.0 

func (s *Service) Open() error

Open opens the network listener and begins serving requests.

func (*Service) SetLogger added in v0.9.0 

func (s *Service) SetLogger(l *log.Logger)

SetLogger sets the internal logger to the logger passed in.

type ShardMapper added in v0.9.2 

type ShardMapper struct {
	MetaStore interface {
		NodeID() uint64
		Node(id uint64) (ni *meta.NodeInfo, err error)
	}

	TSDBStore interface {
		CreateMapper(shardID uint64, query string, chunkSize int) (tsdb.Mapper, error)
	}
}

ShardMapper is responsible for providing mappers for requested shards. It is responsible for creating those mappers from the local store, or reaching out to another node on the cluster.

func NewShardMapper added in v0.9.2 

func NewShardMapper() *ShardMapper

NewShardMapper returns a mapper of local and remote shards.

func (*ShardMapper) CreateMapper added in v0.9.2 

func (r *ShardMapper) CreateMapper(sh meta.ShardInfo, stmt string, chunkSize int) (tsdb.Mapper, error)

CreateMapper returns a Mapper for the given shard ID.

type ShardMapping added in v0.9.0 

type ShardMapping struct {
	Points map[uint64][]tsdb.Point    // The points associated with a shard ID
	Shards map[uint64]*meta.ShardInfo // The shards that have been mapped, keyed by shard ID
}

ShardMapping contains a mapping of a shards to a points.

func NewShardMapping added in v0.9.0 

func NewShardMapping() *ShardMapping

NewShardMapping creates an empty ShardMapping

func (*ShardMapping) MapPoint added in v0.9.0 

func (s *ShardMapping) MapPoint(shardInfo *meta.ShardInfo, p tsdb.Point)

MapPoint maps a point to shard

type ShardWriter added in v0.9.0 

type ShardWriter struct {
	MetaStore interface {
		Node(id uint64) (ni *meta.NodeInfo, err error)
	}
	// contains filtered or unexported fields
}

ShardWriter writes a set of points to a shard.

func NewShardWriter added in v0.9.0 

func NewShardWriter(timeout time.Duration) *ShardWriter

NewShardWriter returns a new instance of ShardWriter.

func (*ShardWriter) Close added in v0.9.0 

func (w *ShardWriter) Close() error

func (*ShardWriter) WriteShard added in v0.9.0 

func (w *ShardWriter) WriteShard(shardID, ownerID uint64, points []tsdb.Point) error

type WritePointsRequest added in v0.9.0 

type WritePointsRequest struct {
	Database         string
	RetentionPolicy  string
	ConsistencyLevel ConsistencyLevel
	Points           []tsdb.Point
}

WritePointsRequest represents a request to write point data to the cluster

func (*WritePointsRequest) AddPoint added in v0.9.0 

func (w *WritePointsRequest) AddPoint(name string, value interface{}, timestamp time.Time, tags map[string]string)

AddPoint adds a point to the WritePointRequest with field name 'value'

type WriteShardRequest added in v0.9.0 

type WriteShardRequest struct {
	// contains filtered or unexported fields
}

WriteShardRequest represents the a request to write a slice of points to a shard

func (*WriteShardRequest) AddPoint added in v0.9.0 

func (w *WriteShardRequest) AddPoint(name string, value interface{}, timestamp time.Time, tags map[string]string)

func (*WriteShardRequest) AddPoints added in v0.9.0 

func (w *WriteShardRequest) AddPoints(points []tsdb.Point)

func (*WriteShardRequest) MarshalBinary added in v0.9.0 

func (w *WriteShardRequest) MarshalBinary() ([]byte, error)

MarshalBinary encodes the object to a binary format.

func (*WriteShardRequest) Points added in v0.9.0 

func (w *WriteShardRequest) Points() []tsdb.Point

func (*WriteShardRequest) SetShardID added in v0.9.0 

func (w *WriteShardRequest) SetShardID(id uint64)

func (*WriteShardRequest) ShardID added in v0.9.0 

func (w *WriteShardRequest) ShardID() uint64

func (*WriteShardRequest) UnmarshalBinary added in v0.9.0 

func (w *WriteShardRequest) UnmarshalBinary(buf []byte) error

UnmarshalBinary populates WritePointRequest from a binary format.

type WriteShardResponse added in v0.9.0 

type WriteShardResponse struct {
	// contains filtered or unexported fields
}

WriteShardResponse represents the response returned from a remote WriteShardRequest call

func (*WriteShardResponse) Code added in v0.9.0 

func (w *WriteShardResponse) Code() int

func (*WriteShardResponse) MarshalBinary added in v0.9.0 

func (w *WriteShardResponse) MarshalBinary() ([]byte, error)

MarshalBinary encodes the object to a binary format.

func (*WriteShardResponse) Message added in v0.9.0 

func (w *WriteShardResponse) Message() string

func (*WriteShardResponse) SetCode added in v0.9.0 

func (w *WriteShardResponse) SetCode(code int)

func (*WriteShardResponse) SetMessage added in v0.9.0 

func (w *WriteShardResponse) SetMessage(message string)

func (*WriteShardResponse) UnmarshalBinary added in v0.9.0 

func (w *WriteShardResponse) UnmarshalBinary(buf []byte) error

UnmarshalBinary populates WritePointRequest from a binary format.

Source Files

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Directories

Path Synopsis
Package internal is a generated protocol buffer package.
 Package internal is a generated protocol buffer package.

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