DataStax Enterprise C# Driver

DataStax Enterprise C# Driver

AggregateMetadata Class

AlreadyExistsException Class

AtomicMonotonicTimestampGenerator Class

AtomicMonotonicWinApiTimestampGenerator Class

AuthenticationException Class

BatchStatement Class

BatchType Enumeration

BigIntegerTypeAdapter Class

BoundStatement Class

BusyPoolException Class

CassandraConnectionStringBuilder Class

ClientOptions Class

ColumnDesc Class

ColumnTypeCode Enumeration

CompressionType Enumeration

Configuration Class

ConsistencyLevel Enumeration

ConstantReconnectionPolicy Class

ConstantSpeculativeExecutionPolicy Class

CqlColumn Class

CustomColumnInfo Class

DataCollectionMetadata Class

DataCollectionMetadata.SortOrder Enumeration

DCAwareRoundRobinPolicy Class

DecimalTypeAdapter Class

DefaultRetryPolicy Class

Diagnostics Class

DowngradingConsistencyRetryPolicy Class

DriverException Class

DriverInternalError Class

DseCluster Class

DseClusterBuilder Class

DseConfiguration Class

DseLoadBalancingPolicy Class

Duration Structure

DynamicCompositeTypeAdapter Class

EC2MultiRegionTranslator Class

ExecutionException Class

ExecutionInfo Class

ExponentialReconnectionPolicy Class

Extensions Class

FallthroughRetryPolicy Class

FixedReconnectionPolicy Class

FunctionFailureException Class

FunctionMetadata Class

HostDistance Enumeration

HostsEventArgs Class

HostsEventArgs.Kind Enumeration

HostsEventHandler Delegate

IAddressTranslator Interface

IAuthenticator Interface

IAuthProvider Interface

ICluster Interface

IColumnInfo Interface

IdempotenceAwareRetryPolicy Class

IDseCluster Interface

IDseSession Interface

IExecutionProfile Interface

IExecutionProfileBuilder Interface

IExecutionProfileOptions Interface

IExtendedRetryPolicy Interface

IFrameCompressor Interface

IInitializer Interface

ILoadBalancingPolicy Interface

IndexMetadata Class

IndexMetadata.IndexKind Enumeration

InvalidConfigurationInQueryException Class

InvalidQueryException Class

InvalidTypeException Class

IReconnectionPolicy Interface

IReconnectionSchedule Interface

IRetryPolicy Interface

IsBootstrappingException Class

ISession Interface

ISessionState Interface

ISpeculativeExecutionPlan Interface

ISpeculativeExecutionPolicy Interface

IStatement Interface

ITimestampGenerator Interface

ITypeAdapter Interface

KeyspaceMetadata Class

KeyType Enumeration

ListColumnInfo Class

LocalDate Class

LocalTime Class

LoggingRetryPolicy Class

MapColumnInfo Class

MaterializedViewMetadata Class

MetadataSyncOptions Class

MetricsExtensions Class

MonitorReportingOptions Class

NoHostAvailableException Class

NoneAuthProvider Class

NoSpeculativeExecutionPolicy Class

NullTypeAdapter Class

OperationTimedOutException Class

OverloadedException Class

PlainTextAuthProvider Class

PoolingOptions Class

PreparedQueryNotFoundException Class

PreparedStatement Class

ProtocolErrorException Class

ProtocolOptions Class

ProtocolVersion Enumeration

QueryExecutionException Class

QueryOptions Class

QueryProtocolOptions Class

QueryProtocolOptions.QueryFlags Enumeration

QueryTimeoutException Class

QueryTrace Class

QueryTrace.Event Class

QueryValidationException Class

ReadFailureException Class

ReadTimeoutException Class

RegularStatement Class

ReplicationStrategies Class

RequestInvalidException Class

RetryDecision Class

RetryDecision.RetryDecisionType Enumeration

RetryLoadBalancingPolicy Class

RetryLoadBalancingPolicyEventArgs Class

RoundRobinPolicy Class

RoutingKey Class

RowSetMetadata Class

SchemaChangedEventArgs Class

SchemaChangedEventArgs.Kind Enumeration

SchemaChangedEventHandler Delegate

ServerErrorException Class

SetColumnInfo Class

SimpleStatement Class

SocketOptions Class

SSLOptions Class

Statement Class

SyntaxError Class

TableColumn Class

TableMetadata Class

TableOptions Class

TimeUuid Structure

TokenAwarePolicy Class

ToManyConnectionsPerHost Class

TraceRetrievalException Class

TruncateException Class

TupleColumnInfo Class

TypeAdapters Class

UdtColumnInfo Class

UdtMap(T) Class

UdtMappingDefinitions Class

UnauthorizedException Class

UnavailableException Class

WriteFailureException Class

WriteTimeoutException Class

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ConsistencyLevel Enumeration

Consistency refers to how up-to-date and synchronized a row of Cassandra data is on all of its replicas. When selecting, the consistency level specifies how many replicas must respond to a read request before returning data to the client application. When updating, inserting or deleting the consistency level specifies the number of replicas on which the write must succeed before returning an acknowledgment to the client application.

Namespace: Dse
Assembly: Dse (in Dse.dll) Version: 2.9.0

Syntax

C#

public enum ConsistencyLevel

Members

	Member name	Value	Description
	Any	0	Writing: A write must be written to at least one node. If all replica nodes for the given row key are down, the write can still succeed after a hinted handoff has been written. If all replica nodes are down at write time, an ANY write is not readable until the replica nodes for that row have recovered.
	One	1	Returns a response from the closest replica, as determined by the snitch.
	Two	2	Returns the most recent data from two of the closest replicas.
	Three	3	Returns the most recent data from three of the closest replicas.
	Quorum	4	Reading: Returns the record with the most recent timestamp after a quorum of replicas has responded regardless of data center. Writing: A write must be written to the commit log and memory table on a quorum of replica nodes.
	All	5	Reading: Returns the record with the most recent timestamp after all replicas have responded. The read operation will fail if a replica does not respond. Writing: A write must be written to the commit log and memory table on all replica nodes in the cluster for that row.
	LocalQuorum	6	Reading: Returns the record with the most recent timestamp once a quorum of replicas in the current data center as the coordinator node has reported. Writing: A write must be written to the commit log and memory table on a quorum of replica nodes in the same data center as the coordinator node. Avoids latency of inter-data center communication.
	EachQuorum	7	Reading: Returns the record once a quorum of replicas in each data center of the cluster has responded. Writing: Strong consistency. A write must be written to the commit log and memtable on a quorum of replica nodes in all data centers.
	Serial	8	Allows reading the current (and possibly uncommitted) state of data without proposing a new addition or update. If a SERIAL read finds an uncommitted transaction in progress, it will commit the transaction as part of the read.
	LocalSerial	9	Same as Serial, but confined to the data center.
	LocalOne	10	Similar to One but only within the DC the coordinator is in.

See Also

Reference

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