If you are using carto "named maps", you need to persist your redist database.

[aarontract]

PSA - If you are using named maps to create layers, you need to persist your redist database. I dont think many people use them.

We are playing around with cartodb on a legacy project that using carto.js V3, and it uses named maps heavily. For some reason named maps are stored on the redis database, not PostgreSQL.

If you go to the redis section:
https://cartodb.readthedocs.io/en/latest/install.html

_"By default redis server is configured to only have periodic snapshotting to disk. If stopped or restarted some data stored in redis since the last snahpshot can be lost. In CARTO redis is not just a simple cache storage. It stores information that need to be persisted.

For data safety, make sure to have proper values of save, appendonly and appendfsync config attributes. For more information check http://redis.io/topics/persistence"_

There are 3 redist dbs, 0 (name maps, created layers), 5(sessions), 8(limits)