Module config 

This module contains global configuration constants for RainDB.

These values usually correspond to configurable options for LevelDB (in its options.h file). To get to an MVP and iterate, we keep static values here. These may be made configurable in future versions.

Enums

TableFileCompressionType

The compression types available for blocks within a table file.

Constants

GROUP_COMMIT_SMALL_WRITE_THRESHOLD_BYTES 🔒

The upper threshold for a write to be considered a small write.

ITERATION_READ_BYTES_PERIOD 🔒

The approximate period in bytes between sampling the data read during iteration.

L0_COMPACTION_TRIGGER 🔒

Level-0 compaction is started when we hit this many files.

L0_SLOWDOWN_WRITES_TRIGGER 🔒

Soft limit on the number of level-0 files.

L0_STOP_WRITES_TRIGGER 🔒

Maximum number of level-0 files.

MAX_GROUP_COMMIT_SIZE_BYTES 🔒

The overall maximum group commit batch size.

MAX_MEM_COMPACT_LEVEL 🔒

Maximum level to which a newly compacted memtable is pushed if it does not create an overlap in keys.

MAX_NUM_LEVELS 🔒

The maximum number of SSTable levels that is allowed.

PREFIX_COMPRESSION_RESTART_INTERVAL 🔒

The number of keys between restart points when prefix compressing keys.

SEEK_DATA_SIZE_THRESHOLD_KIB 🔒

The number of kibibytes that are allowed for a single seek of a table file.

SIZE_OF_U32_BYTES 🔒

The size of a u32 in bytes.

SMALL_WRITE_ADDITIONAL_GROUP_COMMIT_SIZE_BYTES 🔒

The allowable additional bytes to add to a group commit where the first writer is doing a small write.

TABLE_FILE_COMPRESSION_TYPE 🔒

The compression type to use for blocks within a table file.