Struct CollectionMetadata 

pub struct CollectionMetadata {
    pub version: MetadataVersion,
    pub name: String,
    pub created_at: u64,
    pub updated_at: u64,
    pub document_count: u64,
    pub total_size_bytes: u64,
    pub wal_config: Option<CollectionWalConfig>,
}

Collection metadata stored on disk.

This struct contains all persistent metadata for a collection, including statistics, operational state, and WAL configuration.

Storage limit: 1MB total serialized size

Fields

version: MetadataVersion

Metadata format version

name: String

Collection name

created_at: u64

Creation timestamp (Unix timestamp)

updated_at: u64

Last modification timestamp

document_count: u64

Number of documents in the collection

total_size_bytes: u64

Total size of all documents (bytes)

wal_config: Option<CollectionWalConfig>

WAL configuration for this collection

Implementations

impl CollectionMetadata

pub fn new(name: String) -> Self

Create new metadata for a collection

pub fn upgrade_to_current(&mut self) -> Result<(), String>

Upgrade metadata to the current version if needed

This method handles forward migration of metadata from older versions to the current version. It modifies the metadata in-place.

pub const fn needs_upgrade(&self) -> bool

Check if metadata needs upgrade to current version

pub fn touch(&mut self)

pub fn add_document(&mut self, size_bytes: u64)

Increment document count and size

pub fn remove_document(&mut self, size_bytes: u64)

Decrement document count and size

pub fn update_document_size(&mut self, old_size: u64, new_size: u64)

Update document size (for modifications)

Trait Implementations

impl Clone for CollectionMetadata

fn clone(&self) -> CollectionMetadata

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for CollectionMetadata

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for CollectionMetadata

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for CollectionMetadata

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.