lcompact_community.yaml

http:
  # normally parent path of db path
  document_root: /dev/shm
  listening_ports: '8081'
setenv:
  DictZipBlobStore_zipThreads: 8
  StrSimpleEnvNameNotOverwrite: StringValue
  IntSimpleEnvNameNotOverwrite: 16384
  OverwriteThisEnv:
    #comment: overwrite is default to false
    overwrite: true
    value: force overwrite this env by overwrite true
Cache:
  clock-cache-default:
    class-needs-TBB: ClockCache
    class: LRUCache
    params:
      capacity: 0
      num_shard_bits: -1
      strict_capacity_limit: false
      metadata_charge_policy: kFullChargeCacheMetadata
  lru_cache:
    class: LRUCache
    params:
      capacity: 256G
      num_shard_bits: -1
      strict_capacity_limit: false
      high_pri_pool_ratio: 0.5
      use_adaptive_mutex: false
      metadata_charge_policy: kFullChargeCacheMetadata
Statistics:
  stat-strings: default
FilterPolicy:
  bloom_filter:
    class: BloomFilter
    params:
      bits_per_key: 10
      use_block_based_builder: false
MemTableRepFactory:
  cspp:
    class: cspp
    params:
      mem_cap: 256M
      use_vm: false
      token_use_idle: true
  skiplist:
    class: SkipList
    params:
      lookahead: 0
TableFactory:
  bb:
    class: BlockBasedTable
    params:
      checksum: kCRC32c
      block_size: 4K
      block_restart_interval: 16
      index_block_restart_interval: 1
      metadata_block_size: 4K
      use_raw_size_as_estimated_file_size: true
      enable_index_compression: true
      block_cache: "${lru_cache}"
      block_cache_compressed:
      persistent_cache:
      #filter_policy: "${bloom_filter}"
  dispatch:
    class: DispatcherTable
    params:
      default: bb
      readers:
        BlockBasedTable: bb
      level_writers:
      - bb
      - bb
      - bb
      - bb
      - bb
      - bb
      - bb
      - bb
      - bb
CFOptions:
  default:
    max_write_buffer_number: 4
    write_buffer_size: 128M
    target_file_size_base: 16M
    target_file_size_multiplier: 2
    table_factory: dispatch
    memtable_factory: "$cspp"
    #memtable_factory": "$skiplist"
    compression_per_level:
    - kNoCompression
    - kNoCompression
    - kZSTD
    - kZSTD
    - kZSTD
    - kZSTD
    - kZSTD
    - kZSTD
    level0_slowdown_writes_trigger: 20
    level0_stop_writes_trigger: 36
    level0_file_num_compaction_trigger: 4
    ttl: 0
DBOptions:
  dbo:
    #bytes_per_sync: 2M
    create_if_missing: true
    create_missing_column_families: true
    #db_paths: "/dev/shm/strings"
    max_background_compactions: 40
    max_subcompactions: 1
    max_level1_subcompactions: 7
    inplace_update_support: false
    WAL_size_limit_MB: 0
    statistics: "${stat-strings}"
    allow_mmap_reads: false
databases:
  strings:
    method: DB::Open
    params:
      db_options: "$dbo"
      column_families:
        default: "$default"
      #path is optional, if not defined, use name as path
      path: /dev/shm/strings
open: strings