frostfs-api/proto-docs/storagegroup.md

Protocol Documentation

Table of Contents

• storagegroup/types.proto

  • Messages
    • StorageGroup

• Scalar Value Types

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storagegroup/types.proto

Message StorageGroup

StorageGroup groups the information about the NeoFS storage group. The storage group consists of objects from single container.

Field	Type	Label	Description
ValidationDataSize	uint64		ValidationDataSize carries the total size of the payloads of the storage group members.
ValidationHash	bytes		ValidationHash carries homomorphic hash from the concatenation of the payloads of the storage group members. The order of concatenation is the same as the order of the members in the Members field.
ExpirationEpoch	uint64		ExpirationEpoch carries last NeoFS epoch number of the storage group lifetime.
Members	refs.ObjectID	repeated	Members carries the list of identifiers of the object storage group members. The list is strictly ordered.

Scalar Value Types

.proto Type	Notes	C++ Type	Java Type	Python Type
double		double	double	float
float		float	float	float
int32	Uses variable-length encoding. Inefficient for encoding negative numbers – if your field is likely to have negative values, use sint32 instead.	int32	int	int
int64	Uses variable-length encoding. Inefficient for encoding negative numbers – if your field is likely to have negative values, use sint64 instead.	int64	long	int/long
uint32	Uses variable-length encoding.	uint32	int	int/long
uint64	Uses variable-length encoding.	uint64	long	int/long
sint32	Uses variable-length encoding. Signed int value. These more efficiently encode negative numbers than regular int32s.	int32	int	int
sint64	Uses variable-length encoding. Signed int value. These more efficiently encode negative numbers than regular int64s.	int64	long	int/long
fixed32	Always four bytes. More efficient than uint32 if values are often greater than 2^28.	uint32	int	int
fixed64	Always eight bytes. More efficient than uint64 if values are often greater than 2^56.	uint64	long	int/long
sfixed32	Always four bytes.	int32	int	int
sfixed64	Always eight bytes.	int64	long	int/long
bool		bool	boolean	boolean
string	A string must always contain UTF-8 encoded or 7-bit ASCII text.	string	String	str/unicode
bytes	May contain any arbitrary sequence of bytes.	string	ByteString	str