Hadoop Operations

Appendix A. Deprecated Configuration Properties

In Apache Hadoop 2.0 and CDH4, a large swath of configuration properties were deprecated and replaced with properties that have more accurate names. Although the original property names continue to work for standard (non-HA, nonfederated) HDFS deployments and MRv1, users of these versions are encouraged to switch to the new properties. For those who wish to use new features such as HDFS high availability, the new properties must be used. Table A-1 lists the Apache Hadoop 1.0/CDH3 property name and its new Apache Hadoop 2.0/CDH4 counterpart. Property names are ordered by the original name to make reference easier.

Table A-1. Deprecated property names and their replacements

Original Property Name	New Property Name
StorageId	dfs.datanode.StorageId
create.empty.dir.if.nonexist	mapreduce.jobcontrol.createdir.ifnotexist
dfs.access.time.precision	dfs.namenode.accesstime.precision
dfs.backup.address	dfs.namenode.backup.address
dfs.backup.http.address	dfs.namenode.backup.http-address
dfs.balance.bandwidthPerSec	dfs.datanode.balance.bandwidthPerSec
dfs.block.size	dfs.blocksize
dfs.client.buffer.dir	fs.client.buffer.dir
dfs.data.dir	dfs.datanode.data.dir
dfs.datanode.max.xcievers	dfs.datanode.max.transfer.threads
dfs.df.interval	fs.df.interval
dfs.http.address	dfs.namenode.http-address
dfs.https.address	dfs.namenode.https-address
dfs.https.client.keystore.resource	dfs.client.https.keystore.resource
dfs.https.need.client.auth	dfs.client.https.need-auth
dfs.max-repl-streams	dfs.namenode.replication.max-streams ...