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Set the size of the client location cache. Raising this value can boost performance in very large databases where clients access data in a near-random pattern. Defaults to 100000.

Set the maximum number of watches allowed to be outstanding on a database connection. Increasing this number could result in increased resource usage. Reducing this number will not cancel any outstanding watches. Defaults to 10000 and cannot be larger than 1000000.

Specify the machine ID that was passed to fdbserver processes running on the same machine as this client, for better location-aware load balancing.

Specify the datacenter ID that was passed to fdbserver processes running in the same datacenter as this client, for better location-aware load balancing.

Snapshot read operations will see the results of writes done in the same transaction. This is the default behavior.

Snapshot read operations will not see the results of writes done in the same transaction. This was the default behavior prior to API version 300.

Sets the maximum escaped length of key and value fields to be logged to the trace file via the LOG_TRANSACTION option. This sets the `transaction_logging_max_field_length` option of each transaction created by this database. See the transaction option description for more information.

Set a timeout in milliseconds which, when elapsed, will cause each transaction automatically to be cancelled. This sets the `timeout` option of each transaction created by this database. See the transaction option description for more information. Using this option requires that the API version is 610 or higher.

Set a maximum number of retries after which additional calls to `onError` will throw the most recently seen error code. This sets the `retry_limit` option of each transaction created by this database. See the transaction option description for more information.

Set the maximum amount of backoff delay incurred in the call to `onError` if the error is retryable. This sets the `max_retry_delay` option of each transaction created by this database. See the transaction option description for more information.

Set the maximum transaction size in bytes. This sets the `size_limit` option on each transaction created by this database. See the transaction option description for more information.

The read version will be committed, and usually will be the latest committed, but might not be the latest committed in the event of a simultaneous fault and misbehaving clock.

Deprecated. Addresses returned by get_addresses_for_key include the port when enabled. As of api version 630, this option is enabled by default and setting this has no effect.

Allows `get` operations to read from sections of keyspace that have become unreadable because of versionstamp operations. This sets the `bypass_unreadable` option of each transaction created by this database. See the transaction option description for more information.

Use configuration database.

An integer between 0 and 100 (default is 0) expressing the probability that a client will verify it can't read stale data whenever it detects a recovery.