Struct CheckpointInfo 

pub struct CheckpointInfo {
    pub sst_files: usize,
    pub blob_files: usize,
    pub total_bytes: u64,
    pub version_id: u64,
    pub seqno: SeqNo,
}

Summary of a checkpoint produced by AbstractTree::create_checkpoint.

All byte counts are logical file sizes — hard links share the underlying inode storage, so a checkpoint’s marginal disk usage is typically zero until the original files are compacted away.

Fields

sst_files: usize

Number of SST files captured.

blob_files: usize

Number of blob (value-log) files captured. Always 0 for a standard Tree.

total_bytes: u64

Sum of the logical file sizes of every file the checkpoint captured: the SSTs, the blob files, and the .restrict-bound sidecar that belongs to a tight-space-restricted SST (per-table state, written beside its table, that a restore needs to recover the exact bound). Tree-level metadata — the manifest, the version pointer, the config — is NOT counted: this figure describes the captured data, not the whole directory.

It measures the same SET of files as StorageStats::used_bytes, which reports them PHYSICALLY, so the two differ by exactly the bytes a tight-space reclaim punched out and agree everywhere else.

version_id: u64

The version ID embedded in the checkpoint’s current pointer.

seqno: SeqNo

Lower-bound visible-seqno watermark for the snapshot.

Captured from the tree’s visible_seqno generator BEFORE AbstractTree::current_version. Following the standard “lowest-excluded” watermark convention, info.seqno = N means every record with seqno < N was committed at sample time and is therefore guaranteed to be present in the snapshot. Records with seqno == N may or may not be included (writers can hold a record in the memtable for an instant before publishing the next watermark); records with seqno > N may also be present (writers can advance the counter between sample and version snapshot, and those keys still land in the captured memtable).

PITR consumers MUST use seqno < info.seqno as the inclusion gate. Using <= (treating this as a max-included ceiling) could move a recovery cutoff past data still needed from WAL or replication; the field is a strict lower-exclusive watermark, not a max-included ceiling.

Trait Implementations

impl Clone for CheckpointInfo

fn clone(&self) -> CheckpointInfo

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for CheckpointInfo

impl Debug for CheckpointInfo

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

Formats the value using the given formatter.