Redistributes HBase regions by closing them

hbase_redistribute_regions.rb

def redistribute_regions(table_name)
  admin = HBaseAdmin.new(HBaseConfiguration.new())
  t = HTable.new(table_name.to_java_string)
  t.getRegionsInfo().each do |r, addr|
    puts "closing region #{r.getRegionNameAsString()}"
    admin.closeRegion(r.getRegionNameAsString().to_java_string, [].to_java)
  end
end


def enable_regions(table_name)
  admin = HBaseAdmin.new(HBaseConfiguration.new())
  t = HTable.new(table_name.to_java_string)
  t.getRegionsInfo().each do |r, addr|
    puts "enabling region #{r.getRegionNameAsString()}"
    enable_region r.getRegionNameAsString().to_s
  end
end


def disable_regions(table_name)
  admin = HBaseAdmin.new(HBaseConfiguration.new())
  t = HTable.new(table_name.to_java_string)
  t.getRegionsInfo().each do |r, addr|
    puts "disabling region #{r.getRegionNameAsString()}"
    disable_region r.getRegionNameAsString().to_s
  end
end