[HDFS-8923] Add -source flag to balancer usage message

• Type: Bug
• Status: Resolved
• Priority: Trivial
• Resolution: Fixed
• Fix Version/s: 2.8.0, 3.0.0-alpha1
• Component/s: balancer & mover, documentation
• Hadoop Flags: Reviewed
• Assignee: Chris Trezzo
• Reporter: Chris Trezzo
• Created: 19/Aug/15 17:52
• Updated: 30/Aug/16 01:29
• Resolved: 19/Feb/16 02:41

Description

HDFS-8826 added a -source flag to the balancer, but the usage message still needs to be updated. See current usage message in trunk:

   private static final String USAGE = "Usage: hdfs balancer"
       + "\n\t[-policy <policy>]\tthe balancing policy: "
       + BalancingPolicy.Node.INSTANCE.getName() + " or "
       + BalancingPolicy.Pool.INSTANCE.getName()
       + "\n\t[-threshold <threshold>]\tPercentage of disk capacity"
       + "\n\t[-exclude [-f <hosts-file> | <comma-separated list of hosts>]]"
       + "\tExcludes the specified datanodes."
       + "\n\t[-include [-f <hosts-file> | <comma-separated list of hosts>]]"
       + "\tIncludes only the specified datanodes."
       + "\n\t[-idleiterations <idleiterations>]"
       + "\tNumber of consecutive idle iterations (-1 for Infinite) before "
       + "exit."
       + "\n\t[-runDuringUpgrade]"
       + "\tWhether to run the balancer during an ongoing HDFS upgrade."
       + "This is usually not desired since it will not affect used space "
       + "on over-utilized machines.";

Issue Links

• depends upon: HDFS-8826 Balancer may not move blocks efficiently in some cases
• is duplicated by: HDFS-9750 Document -source option for balancer