lmdbbs

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

type Options struct {
	// Path is the directory where the LMDB blockstore resides. If it doesn't
	// exist, it will be created.
	Path string

	// ReadOnly, if true, opens this blockstore in read-only mode.
	ReadOnly bool

	// NoSync disables flushing system buffers to disk immediately when
	// committing transactions.
	NoSync bool

	// +++ DB sizing fields. +++ //
	// InitialMmapSize is the initial mmap size passed to LMDB when
	// creating/opening the environment.
	InitialMmapSize int64

	// MmapGrowthStepFactor determines the next map size when a write fails. The
	// current size is multiplied by the factor, and rounded up to the next
	// value divisible by os.Getpagesize(), to obtain the new map size, which is
	// applied with mdb_env_set_mapsize.
	MmapGrowthStepFactor float64

	// MmapGrowthStepMax is the maximum step size by which we'll grow the mmap.
	MmapGrowthStepMax int64

	// MaxReaders is the maximum amount of concurrent reader slots that exist
	// in the lock table. By default 254.
	MaxReaders int

	// RetryDelay is a fixed delay to wait before a transaction that errored
	// with MDB_READERS_FULL will be reattempted. Contention due to incorrect
	// sizing of MaxReaders will thus lead to a system slowdown via
	// backpressure, instead of a straight out error.
	// Jittered by RetryJitter (default: +/-20%).
	RetryDelay time.Duration
}