alluxio.job.replicate

Interface ReplicationHandler

All Known Implementing Classes:

DefaultReplicationHandler

public interface ReplicationHandler

Interface for adjusting the replication level of blocks.

Method Summary

Modifier and Type	Method and Description
long	evict(alluxio.AlluxioURI uri, long blockId, int numReplicas) Decreases the block replication level by a target number of replicas.
long	replicate(alluxio.AlluxioURI uri, long blockId, int numReplicas) Increases the block replication level by a target number of replicas.

Method Detail

evict

long evict(alluxio.AlluxioURI uri,
           long blockId,
           int numReplicas)
    throws alluxio.exception.AlluxioException,
           IOException

Decreases the block replication level by a target number of replicas.

Parameters:

uri - URI of the file the block belongs to

blockId - ID of the block

numReplicas - how many replicas to remove

Returns:

the ID of the replicate job

Throws:

alluxio.exception.AlluxioException - if an Alluxio error is encountered

IOException - if a non-Alluxio error is encountered

replicate

long replicate(alluxio.AlluxioURI uri,
               long blockId,
               int numReplicas)
        throws alluxio.exception.AlluxioException,
               IOException

Increases the block replication level by a target number of replicas.

Parameters:

uri - URI of the file the block belongs to

blockId - ID of the block

numReplicas - how many replicas to add

Returns:

the ID of the replicate job

Throws:

alluxio.exception.AlluxioException - if an Alluxio error is encountered

IOException - if a non-Alluxio error is encountered