Redis.include( MeRedis )
# zip key crumbs user, card, card_preview, zips integer crumbs to base62,
# for keys starting with card_preview prefix compress values with Zlib
# for keys starting with user or card compress values with ActiveRecordJSONCompressor
Redis.configure(
  hash_max_ziplist_entries: 256,
  zip_crumbs: %i[user card card_preview], # -> { user: :u, card: :c, card_preview: :c0 }
  integers_to_base62: true,
  compress_namespaces: {
      :card_preview => MeRedis::ZipValues::ZlibCompressor,
      %i[user card] => ActiveRecordJSONCompressor
  }
)

# key zipping directly like this:
Redis.configure(
  hash_max_ziplist_entries: 256,
  zip_crumbs: { user: :u, card: :c, card_preview: :cp],
  integers_to_base62: true,
)

Redis.include( MeRedis ) # or Redis.prepend( MeRedis::ZipValues )
# don't zip keys just values,
# for keys started with :user, :card, :card_preview
# compress all values with default compressor
# default compressor is ZlibCompressor if you prepend ZipValues module or include  whole MeRedis module,
# otherwise it is EmptyCompressor which doesn't compress anything
Redis.configure(
  hash_max_ziplist_entries: 256,
  compress_namespaces: %i[user card card_preview]
)