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This module of Akka is marked as experimental, which means that it is in early access mode, which also means that it is not covered by commercial support. An experimental module doesn't have to obey the rule of staying binary compatible between minor releases. Breaking API changes may be introduced in minor releases without notice as we refine and simplify based on your feedback. An experimental module may be dropped in major releases without prior deprecation.

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#######################################################
# Akka Persistence Query Reference Configuration File #
#######################################################

# This is the reference config file that contains all the default settings.
# Make your edits in your application.conf in order to override these settings.

#//#query-leveldb
# Configuration for the LeveldbReadJournal
akka.persistence.query.journal.leveldb {
  # Implementation class of the LevelDB ReadJournalProvider
  class = "akka.persistence.query.journal.leveldb.LeveldbReadJournalProvider"
  
  # Absolute path to the write journal plugin configuration entry that this 
  # query journal will connect to. That must be a LeveldbJournal or SharedLeveldbJournal.
  # If undefined (or "") it will connect to the default journal as specified by the
  # akka.persistence.journal.plugin property.
  write-plugin = ""
  
  # The LevelDB write journal is notifying the query side as soon as things
  # are persisted, but for efficiency reasons the query side retrieves the events 
  # in batches that sometimes can be delayed up to the configured `refresh-interval`.
  refresh-interval = 3s
  
  # How many events to fetch in one query (replay) and keep buffered until they
  # are delivered downstreams.
  max-buffer-size = 100
}
#//#query-leveldb