loki/docs/sources/configure/examples/yaml/7-Schema-Migration-Snippet.yaml

schema_config:
  configs:
    # Starting from 2018-04-15 Loki should store indexes on BoltDB with the v11 schema
    # using daily periodic tables and chunks on filesystem.
    # The index tables will be prefixed with "index_".
  - from: "2018-04-15"
    store: boltdb-shipper
    object_store: filesystem
    schema: v11
    index:
        period: 24h
        prefix: index_

  # Starting from 2023-6-15 Loki should store indexes on TSDB with the v12 schema
  # using daily periodic tables and chunks on AWS S3.
  - from: "2023-06-15"
    store: tsdb
    object_store: s3
    schema: v12
    index:
        period: 24h
        prefix: index_