hbase-shell/src/main/ruby/shell/commands/balance_rsgroup.rb

# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements.  See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership.  The ASF licenses this file
# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
# with the License.  You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#

module Shell
  module Commands
    class BalanceRsgroup < Command
      def help
        <<-EOF
Balance a RegionServer group

Example:

  hbase> balance_rsgroup 'my_group'

EOF
      end

      def command(group_name)
        # Returns true if balancer was run, otherwise false.
        ret = rsgroup_admin.balance_rs_group(group_name)
        if ret
          puts 'Ran the balancer.'
        else
          puts "Couldn't run the balancer."
        end
        ret
      end
    end
  end
end