Lakehouse

Lakehouse is the top level container.

Object Definition Schema

Schema ID: 0

Field Name	Protobuf Type	Description	Required?	Default
id	string	A unique UUID of the lakehouse	Yes
major_version	uint32	The major version of the format	Yes	0
order	uint32	The order of the B-epsilon tree	Yes	128
namespace_name_max_size_bytes	uint32	The maximum size of a namespace name in bytes	Yes	100
table_name_max_size_bytes	uint32	The maximum size of a table name in bytes	Yes	100
view_name_max_size_bytes	uint32	The maximum size of a view name in bytes	Yes	100
node_file_max_size_bytes	uint64	The maximum size of a node file in bytes	Yes	1048576 (1MB)
properties	map	Free form user-defined key-value string properties	Yes
txn_ttl_millis	uint64	The default maximum time duration that a transaction is valid after began in millisecond	Yes	604800000 (7 days)
txn_isolation_level	IsolationLevel	The default isolation level of a transaction	Yes	SNAPSHOT

Note

An update to some of the fields would entail a potentially expensive change of the TrinityLake tree. For example, changing the maximum object size or file size would entail re-encode all the keys in the tree.