tikv

package
v0.0.0-...-815d2fd Latest Latest
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 Go to latest Published: Jul 15, 2016 License: Apache-2.0 Imports: 35 Imported by: 0

Documentation

Overview

Package tikv provides tcp connection to kvserver.

Index

Constants

View Source 
const (
	// NoJitter makes the backoff sequence strict exponential.
	NoJitter = 1 + iota
	// FullJitter applies random factors to strict exponential.
	FullJitter
	// EqualJitter is also randomized, but prevents very short sleeps.
	EqualJitter
	// DecorrJitter increases the maximum jitter based on the last random value.
	DecorrJitter
)

Variables

This section is empty.

Functions

func NewBackoff 

func NewBackoff(retry, base, cap, jitter int) func() error

NewBackoff creates a backoff func which implements exponential backoff with optional jitters. See http://www.awsarchitectureblog.com/2015/03/backoff.html

func NewMockTikvStore 

func NewMockTikvStore() kv.Storage

NewMockTikvStore creates a mocked tikv store.

Types

type Client 

type Client interface {
	// Close should release all data.
	Close() error
	// SendKVReq sends kv request.
	SendKVReq(addr string, req *kvrpcpb.Request) (*kvrpcpb.Response, error)
	// SendCopReq sends coprocessor request.
	SendCopReq(addr string, req *coprocessor.Request) (*coprocessor.Response, error)
}

Client is a client that sends RPC. It should not be used after calling Close().

type Conn 

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

Conn is a simple wrapper of net.Conn.

func NewConnection 

func NewConnection(addr string, netTimeout int) (*Conn, error)

NewConnection creates a Conn with network timeout..

func NewConnectionWithSize 

func NewConnectionWithSize(addr string, netTimeout int, readSize int, writeSize int) (*Conn, error)

NewConnectionWithSize creates a Conn with network timeout and read/write buffer size.

func (*Conn) BufioReader 

func (c *Conn) BufioReader() *bufio.Reader

BufioReader returns a bufio.Reader for writing.

func (*Conn) Close 

func (c *Conn) Close()

Close closes the net.Conn.

func (*Conn) Flush 

func (c *Conn) Flush() error

Flush writes buffered data to net.Conn.

func (*Conn) Write 

func (c *Conn) Write(p []byte) (int, error)

Write writes data to the bufio.Writer.

type CopClient 

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

CopClient is coprocessor client.

func (*CopClient) Send 

func (c *CopClient) Send(req *kv.Request) kv.Response

Send builds the request and gets the coprocessor iterator response.

func (*CopClient) SupportRequestType 

func (c *CopClient) SupportRequestType(reqType, subType int64) bool

SupportRequestType checks whether reqType is supported.

type Driver 

type Driver struct {
}

Driver implements engine Driver.

func (Driver) Open 

func (d Driver) Open(path string) (kv.Storage, error)

Open opens or creates an TiKV storage with given path. Path example: tikv://etcd-node1:port,etcd-node2:port/pd-path?cluster=1

type Pool 

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

Pool is a TCP connection pool that maintains connections with a specific addr.

func NewPool 

func NewPool(addr string, capability int, f createConnFunc) *Pool

NewPool creates a Pool.

func (*Pool) Close 

func (p *Pool) Close()

Close closes the pool.

func (*Pool) GetConn 

func (p *Pool) GetConn() (*Conn, error)

GetConn takes a connection out of the pool.

func (*Pool) PutConn 

func (p *Pool) PutConn(c *Conn)

PutConn puts a connection back to the pool.

type Pools 

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

Pools maintains connections with multiple addrs.

func NewPools 

func NewPools(capability int, f createConnFunc) *Pools

NewPools creates a Pools. It maintains a Pool for each address, and each Pool has the same capability.

func (*Pools) Close 

func (p *Pools) Close()

Close closes the pool.

func (*Pools) GetConn 

func (p *Pools) GetConn(addr string) (*Conn, error)

GetConn takes a connection out of the pool by addr.

func (*Pools) PutConn 

func (p *Pools) PutConn(c *Conn)

PutConn puts a connection back to the pool.

type Region 

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

Region stores region info. Region is a readonly class.

func (*Region) Clone 

func (r *Region) Clone() *Region

Clone returns a copy of Region.

func (*Region) Contains 

func (r *Region) Contains(key []byte) bool

Contains checks whether the key is in the region, for the maximum region endKey is empty. startKey <= key < endKey.

func (*Region) EndKey 

func (r *Region) EndKey() []byte

EndKey returns EndKey.

func (*Region) GetAddress 

func (r *Region) GetAddress() string

GetAddress returns address.

func (*Region) GetContext 

func (r *Region) GetContext() *kvrpcpb.Context

GetContext constructs kvprotopb.Context from region info.

func (*Region) GetID 

func (r *Region) GetID() uint64

GetID returns id.

func (*Region) NextPeer 

func (r *Region) NextPeer() (*metapb.Peer, error)

NextPeer picks next peer as leader, if out of range return error.

func (*Region) StartKey 

func (r *Region) StartKey() []byte

StartKey returns StartKey.

func (*Region) VerID 

func (r *Region) VerID() RegionVerID

VerID returns the Region's RegionVerID.

type RegionCache 

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

RegionCache caches Regions loaded from PD.

func NewRegionCache 

func NewRegionCache(pdClient pd.Client) *RegionCache

NewRegionCache creates a RegionCache.

func (*RegionCache) DropRegion 

func (c *RegionCache) DropRegion(id RegionVerID)

DropRegion removes a cached Region.

func (*RegionCache) GetRegion 

func (c *RegionCache) GetRegion(key []byte) (*Region, error)

GetRegion find in cache, or get new region.

func (*RegionCache) GetRegionByVerID 

func (c *RegionCache) GetRegionByVerID(id RegionVerID) *Region

GetRegionByVerID finds a Region by Region's verID.

func (*RegionCache) GroupKeysByRegion 

func (c *RegionCache) GroupKeysByRegion(keys [][]byte) (map[RegionVerID][][]byte, RegionVerID, error)

GroupKeysByRegion separates keys into groups by their belonging Regions. Specially it also returns the first key's region which may be used as the 'PrimaryLockKey' and should be committed ahead of others.

func (*RegionCache) NextPeer 

func (c *RegionCache) NextPeer(id RegionVerID)

NextPeer picks next peer as new leader, if out of range of peers delete region.

func (*RegionCache) UpdateLeader 

func (c *RegionCache) UpdateLeader(regionID RegionVerID, leaderID uint64)

UpdateLeader update some region cache with newer leader info.

type RegionVerID 

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

RegionVerID is a unique ID that can identify a Region at a specific version.

type Scanner 

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

Scanner support tikv scan

func (*Scanner) Close 

func (s *Scanner) Close()

Close close iterator.

func (*Scanner) Key 

func (s *Scanner) Key() kv.Key

Key return key.

func (*Scanner) Next 

func (s *Scanner) Next() error

Next return next element.

func (*Scanner) Valid 

func (s *Scanner) Valid() bool

Valid return valid.

func (*Scanner) Value 

func (s *Scanner) Value() []byte

Value return value.

Source Files

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Directories

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