[Node-DuckDB API](./node-duckdb.md) > [IDuckDBOptionsConfig](./node-duckdb.iduckdboptionsconfig.md) ## IDuckDBOptionsConfig interface Options object type for the DuckDB class Signature: ```typescript export interface IDuckDBOptionsConfig ``` ## Properties | Property | Type | Description | | ------------------------------------------------------------------------------------- | --------------------------------------------------- | --------------------------------------------------------------------------------------------- | | [accessMode?](./node-duckdb.iduckdboptionsconfig.accessmode.md) | [AccessMode](./node-duckdb.accessmode.md) | (Optional) Access Mode | | [checkPointWALSize?](./node-duckdb.iduckdboptionsconfig.checkpointwalsize.md) | number | (Optional) Checkpoint Write Ahead Log Size (in bytes) | | [collation?](./node-duckdb.iduckdboptionsconfig.collation.md) | string | (Optional) Collation | | [defaultNullOrder?](./node-duckdb.iduckdboptionsconfig.defaultnullorder.md) | [OrderByNullType](./node-duckdb.orderbynulltype.md) | (Optional) Default order for Null values | | [defaultOrderType?](./node-duckdb.iduckdboptionsconfig.defaultordertype.md) | [OrderType](./node-duckdb.ordertype.md) | (Optional) Default Order | | [maximumMemory?](./node-duckdb.iduckdboptionsconfig.maximummemory.md) | number | (Optional) Maximum memory limit for the databse (in bytes) | | [temporaryDirectory?](./node-duckdb.iduckdboptionsconfig.temporarydirectory.md) | string | (Optional) Location of the temporary directory | | [useDirectIO?](./node-duckdb.iduckdboptionsconfig.usedirectio.md) | boolean | (Optional) Whether to use Direct IO | | [useTemporaryDirectory?](./node-duckdb.iduckdboptionsconfig.usetemporarydirectory.md) | boolean | (Optional) Whether to use temporary directory to store data that doesn't fit in memory |