ApiHdfsReplicationArguments Data Model

Replication arguments for HDFS.

Properties
name data type description
sourceService ApiServiceRef The service to replicate from.
sourcePath string The path to replicate.
destinationPath string The destination to replicate to.
mapreduceServiceName string The mapreduce service to use for the replication job.
schedulerPoolName string Name of the scheduler pool to use when submitting the MapReduce job. Currently supports the capacity and fair schedulers. The option is ignored if a different scheduler is configured.
userName string The user which will execute the MapReduce job. Required if running with Kerberos enabled.
sourceUser string The user which will perform operations on source cluster. Required if running with Kerberos enabled.
numMaps number The number of mappers to use for the mapreduce replication job.
dryRun boolean Whether to perform a dry run. Defaults to false.
bandwidthPerMap number The maximum bandwidth (in MB) per mapper in the mapreduce replication job.
abortOnError boolean Whether to abort on a replication failure. Defaults to false.
removeMissingFiles boolean Whether to delete destination files that are missing in source. Defaults to false.
preserveReplicationCount boolean Whether to preserve the HDFS replication count. Defaults to false.
preserveBlockSize boolean Whether to preserve the HDFS block size. Defaults to false.
preservePermissions boolean Whether to preserve the HDFS owner, group and permissions. Defaults to false. Starting from V10, it also preserves ACLs. Defaults to null (no preserve). ACLs is preserved if both clusters enable ACL support, and replication ignores any ACL related failures.
logPath string The HDFS path where the replication log files should be written to.
skipChecksumChecks boolean Whether to skip checksum based file validation during replication. Defaults to false.
skipListingChecksumChecks boolean Whether to skip checksum based file comparison during replication. Defaults to false.
skipTrash boolean Whether to permanently delete destination files that are missing in source. Defaults to null.
replicationStrategy ReplicationStrategy The strategy for distributing the file replication tasks among the mappers of the MR job associated with a replication. Default is ReplicationStrategy#STATIC.
preserveXAttrs boolean Whether to preserve XAttrs, default to false This is introduced in V10. To preserve XAttrs, both CDH versions should be >= 5.2. Replication fails if either cluster does not support XAttrs.
exclusionFilters array of string Specify regular expression strings to match full paths of files and directories matching source paths and exclude them from the replication. Optional. Available since V11.
raiseSnapshotDiffFailures boolean

Example

{
  "sourceService" : {
    "peerName" : "...",
    "clusterName" : "...",
    "serviceName" : "..."
  },
  "sourcePath" : "...",
  "destinationPath" : "...",
  "mapreduceServiceName" : "...",
  "schedulerPoolName" : "...",
  "userName" : "...",
  "sourceUser" : "...",
  "numMaps" : 12345,
  "dryRun" : true,
  "bandwidthPerMap" : 12345,
  "abortOnError" : true,
  "removeMissingFiles" : true,
  "preserveReplicationCount" : true,
  "preserveBlockSize" : true,
  "preservePermissions" : true,
  "logPath" : "...",
  "skipChecksumChecks" : true,
  "skipListingChecksumChecks" : true,
  "skipTrash" : true,
  "replicationStrategy" : "STATIC",
  "preserveXAttrs" : true,
  "exclusionFilters" : [ "...", "..." ],
  "raiseSnapshotDiffFailures" : true
}