Package org.apache.hadoop.hdfs.server.federation.resolver.order

@Private @Evolving package org.apache.hadoop.hdfs.server.federation.resolver.order
A federated location can be resolved to multiple subclusters. This package takes care of the order in which this multiple destinations should be used.
  • Class
    Description
    AvailableSpaceResolver
    Order the destinations based on available space.
    DestinationOrder
    Order of the destinations when we have multiple of them.
    HashFirstResolver
    Variation of HashResolver that only uses the first level of the path.
    HashResolver
    Order the destinations based on consistent hashing.
    LeaderFollowerResolver
    LEADER_FOLLOWER can be used in cross-cluster disaster tolerance, and the order of namespaces is always "leader,follower,follower...".
    LocalResolver
    The local subcluster (where the writer is) should be tried first.
    OrderedResolver
    Policy that decides which should be the first location accessed given multiple destinations.
    RandomResolver
    Order the destinations randomly.
    RouterResolver<K,V>
    The order resolver that depends upon the Router service.