---
title: "LakehouseStore"
description: "the value of the parameter the address of the lakehouse's store: the folder of files, the catalogue's database address without a password, and the prefix of the lakehouse catalogue's schemas, one for each plane"
section: concepts
address: /concepts/lakehousestore
contract: 0476e35e6e275db5
---

# LakehouseStore

the value of the parameter the address of the lakehouse's store: the folder of files, the catalogue's database address without a password, and the prefix of the lakehouse catalogue's schemas, one for each plane

[figure: LakehouseStore is a value at none scope. The drawing shows its fields and the objects that they point at.]

| property | value |
|---|---|
| kind | value |
| scope | none |
| key | none |
| store | none |
| family | record |



## Fields


| field | type | required | note |
|---|---|---|---|
| `folder` | `text` | yes | a folder on a laptop, a bucket on the three machines |
| `catalogue` | `address` | yes | the database that holds the lakehouse catalogue; the password comes from the secrets manager, never from here |
| `catalogue_prefix` | `text` | yes | one schema of the lakehouse catalogue for each plane under this prefix |
| `scratch` | `text` | no | the folder the engine spills to when a read exceeds its memory; a folder named tmp beside the store's folder when absent, never the working folder of the process (read 27 September: 24 GB of spill in the platform's own tree made a release dirty) |



## Routes that use it
No route takes or returns LakehouseStore directly. The record holds it, and the objects that point at it reach it.