agent

type ActiveSeries interface {
	Ref() chunks.HeadSeriesRef
	Labels() labels.Labels
	LastSampleTimestamp() int64
}

type DB struct {
	// contains filtered or unexported fields
}

type DeletedSeries interface {
	Ref() chunks.HeadSeriesRef
	Labels() labels.Labels
}

type Options struct {
	// Segments (wal files) max size.
	// WALSegmentSize <= 0, segment size is default size.
	// WALSegmentSize > 0, segment size is WALSegmentSize.
	WALSegmentSize int

	// WALCompression configures the compression type to use on records in the WAL.
	WALCompression compression.Type

	// StripeSize is the size (power of 2) in entries of the series hash map. Reducing the size will save memory but impact performance.
	StripeSize int

	// TruncateFrequency determines how frequently to truncate data from the WAL.
	TruncateFrequency time.Duration

	// Shortest and longest amount of time data can exist in the WAL before being
	// deleted.
	MinWALTime, MaxWALTime int64

	// NoLockfile disables creation and consideration of a lock file.
	NoLockfile bool

	// OutOfOrderTimeWindow specifies how much out of order is allowed, if any.
	OutOfOrderTimeWindow int64

	// EnableSTAsZeroSample represents 'created-timestamp-zero-ingestion' feature flag.
	// If true, ST, if non-empty and earlier than sample timestamp, will be stored
	// as a zero sample before the actual sample.
	//
	// The zero sample is best-effort, only debug log on failure is emitted.
	// NOTE(bwplotka): This feature might be deprecated and removed once PROM-60
	// is implemented.
	EnableSTAsZeroSample bool

	// EnableSTStorage determines whether agent DB should write a Start Timestamp (ST)
	// per sample to WAL.
	// Controlled by the `--enable-feature=st-storage` CLI flag; when enabled, ST is
	// persisted to the WAL for samples that include a non-zero start timestamp in
	// supported record types.
	EnableSTStorage bool

	// CheckpointFromInMemorySeries changes checkpoint implementation to use only in-memory series data when building a checkpoint.
	// This prevents re-reading the previous checkpoint and segments from disk.
	CheckpointFromInMemorySeries bool

	// CheckpointBatchSize specifies a size of a single WAL log entry chunk to be flushed.
	//
	// Has no effect if CheckpointFromInMemorySeries is false.
	CheckpointBatchSize int
}