GRPCTransportFactory is the default TransportFactory, using GRPC.

InitSenderForLocalTestCluster initializes a TxnCoordSender that can be used with LocalTestCluster.

MakeTxnMetrics returns a TxnMetrics struct that contains metrics whose windowed portions retain data for approximately histogramWindow.

NewDBServer allocates and returns a new DBServer.

NewDistSender returns a batch.Sender instance which connects to the Cockroach cluster via the supplied gossip instance.

NewLeaseHolderCache creates a new leaseHolderCache of the given size.

NewRangeDescriptorCache returns a new RangeDescriptorCache which uses the given RangeDescriptorDB as the underlying source of range descriptors.

NewRangeIterator creates a new RangeIterator.

NewReplicaSlice creates a ReplicaSlice from the replicas listed in the range descriptor and using gossip to lookup node descriptors.

NewTxnCoordSender creates a new TxnCoordSender for use from a KV distributed DB instance.

SenderTransportFactory wraps a client.Sender for use as a KV Transport.

Ascending means Next() will advance towards keys that compare higher.

Descending means Next() will advance towards keys that compare lower.

BatchCall contains a response and an RPC error (note that the response contains its own roachpb.Error, which is separate from BatchCall.Err), and is analogous to the net/rpc.Call struct.

A DBServer provides an HTTP server endpoint serving the key-value API.

A DistSender provides methods to access Cockroach's monolithic, distributed key value store.

DistSenderConfig holds configuration and auxiliary objects that can be passed to NewDistSender.

DistSenderMetrics is the set of metrics for a given distributed sender.

DistSenderTestingKnobs is a part of the context used to control parts of the system.

EvictionToken holds eviction state between calls to LookupRangeDescriptor.

A LeaseHolderCache is a cache of replica descriptors keyed by range ID.

RangeDescriptorCache is used to retrieve range descriptors for arbitrary keys.

A RangeIterator provides a mechanism for iterating over all ranges in a key span.

ReplicaInfo extends the Replica structure with the associated node descriptor.

A SendOptions structure describes the algorithm for sending RPCs to one or more replicas, depending on error conditions and how many successful responses are required.

A TxnCoordSender is an implementation of client.Sender which wraps a lower-level Sender (either a storage.Stores or a DistSender) to which it sends commands.

TxnMetrics holds all metrics relating to KV transactions.

RangeDescriptorDB is a type which can query range descriptors from an underlying datastore.

Transport objects can send RPCs to one or more replicas of a range.

A ReplicaSlice is a slice of ReplicaInfo.

ScanDirection determines the semantics of RangeIterator.Next() and RangeIterator.NeedAnother().

TransportFactory encapsulates all interaction with the RPC subsystem, allowing it to be mocked out for testing.