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Sets the maximum number of requests processed by an IO worker per flush.  Default: 128 

Return: CASS_OK if successful, otherwise an error occurred


=head3 cluster_set_write_bytes_high_water_mark

 my $int_CassError = $cass->cluster_set_write_bytes_high_water_mark($num_bytes);

Sets the high water mark for the number of bytes outstanding on a connection. Disables writes to a connection if the number of bytes queued exceed this value.  Default: 64 KB 

Return: CASS_OK if successful, otherwise an error occurred


=head3 cluster_set_write_bytes_low_water_mark

 my $int_CassError = $cass->cluster_set_write_bytes_low_water_mark($num_bytes);

Sets the low water mark for number of bytes outstanding on a connection. After exceeding high water mark bytes, writes will only resume once the number of bytes fall below this value.  Default: 32 KB 

Return: CASS_OK if successful, otherwise an error occurred


=head3 cluster_set_pending_requests_high_water_mark

 my $int_CassError = $cass->cluster_set_pending_requests_high_water_mark($num_requests);

Sets the high water mark for the number of requests queued waiting for a connection in a connection pool. Disables writes to a host on an IO worker if the number of requests queued exceed this value.  Default: 128 * max_connections_per_host 

Return: CASS_OK if successful, otherwise an error occurred


=head3 cluster_set_pending_requests_low_water_mark

 my $int_CassError = $cass->cluster_set_pending_requests_low_water_mark($num_requests);

Sets the low water mark for the number of requests queued waiting for a connection in a connection pool. After exceeding high water mark requests, writes to a host will only resume once the number of requests fall below this value.  Default: 64 * max...

Return: CASS_OK if successful, otherwise an error occurred


=head3 cluster_set_connect_timeout

 $cass->cluster_set_connect_timeout($timeout_ms);

Sets the timeout for connecting to a node.  Default: 5000 milliseconds 

Return: undef


=head3 cluster_set_request_timeout

 $cass->cluster_set_request_timeout($timeout_ms);

Sets the timeout for waiting for a response from a node.  Default: 12000 milliseconds 

Return: undef


=head3 cluster_set_credentials

 $cass->cluster_set_credentials($username, $password);

Sets credentials for plain text authentication. 

Return: undef


=head3 cluster_set_load_balance_round_robin

 $cass->cluster_set_load_balance_round_robin();

Configures the cluster to use round-robin load balancing.  The driver discovers all nodes in a cluster and cycles through them per request. All are considered 'local'. 

Return: undef


=head3 cluster_set_load_balance_dc_aware

 my $int_CassError = $cass->cluster_set_load_balance_dc_aware($local_dc, $used_hosts_per_remote_dc, $allow_remote_dcs_for_local_cl);

Configures the cluster to use DC-aware load balancing. For each query, all live nodes in a primary 'local' DC are tried first, followed by any node from other DCs.  Note: This is the default, and does not need to be called unless switching an existin...

Return: CASS_OK if successful, otherwise an error occurred


=head3 cluster_set_token_aware_routing

 $cass->cluster_set_token_aware_routing($enabled);

Configures the cluster to use Token-aware request routing, or not.  Default is cass_true (enabled).  This routing policy composes the base routing policy, routing requests first to replicas on nodes considered 'local' by the base load balancing polic...

Return: undef


=head3 cluster_set_tcp_nodelay

 $cass->cluster_set_tcp_nodelay($enable);

Enable/Disable Nagel's algorithm on connections.  Default: cass_false (disabled). 

Return: undef


=head3 cluster_set_tcp_keepalive

 $cass->cluster_set_tcp_keepalive($enable, $delay_secs);

Enable/Disable TCP keep-alive  Default: cass_false (disabled). 

Return: undef


=head2 Session

=head3 session_new

 my $obj_CassSession = $cass->session_new();

Creates a new session. 

Return: obj_CassSession