metadata.md

title
Array Metadata

Main Structure

The metadata is a folder called __meta located here:

my_array                            # array folder
   |  ...
   |_ __meta                        # metadata folder
         |_ <timestamped_name>      # metadata file
         |_ ...
         |_ <timestamped_name>.vac  # vacuum file
         |_ ...

The metadata folder can contain any number of timestamped:

• metadata files
• vacuum files
• Note: the timestamped names do not include the format version.

Metadata File

The metadata file consists of a single generic tile, containing multiple entries with the following data:

Field	Type	Description
Key length	uint32_t	The length of the key.
Key	uint8_t[]	The key.
Deletion	uint8_t	1/0 if it is a deletion/insertion.
Value type	uint8_t	The value data type. Present only if del is 0.
Number of values	uint32_t	The number of values. Present only if del is 0.
Value	uint8_t[]	The value. Present only if del is 0.