hbase corpocessor 按照例子，disable,alter table ,enable如何看到效果

public class MyAggregationClient {

private static final byte[] TABLE_NAME = Bytes.toBytes("test11");
private static final byte[] CF = Bytes.toBytes("a");
public static void main(String[] args) throws Throwable {
Configuration customConf = new Configuration();
customConf.set("hbase.zookeeper.quorum",
"testmaster1");
//提高RPC通信时长
customConf.setLong("hbase.rpc.timeout", 600000);
//设置Scan缓存
customConf.setLong("hbase.client.scanner.caching", 1000);
Configuration configuration = HBaseConfiguration.create(customConf);
AggregationClient aggregationClient = new AggregationClient(
configuration);
Scan scan = new Scan();
//指定扫描列族，唯一值
scan.addFamily(CF);
//long rowCount = aggregationClient.rowCount(TABLE_NAME, null, scan);
long rowCount = aggregationClient.rowCount(TableName.valueOf("test11"), new LongColumnInterpreter(), scan);
System.out.println("row count is " + rowCount);
log.o

}

arsenduan · 发表于 2015-9-1 16:37:25

通过hbase shell直接看
参考下面内容

删除一个列族，alter，disable，enable
我们之前建了3个列族，但是发现member_id这个列族是多余的，因为他就是主键，所以我们要将其删除。
hbase(main):003:0>alter 'member',{NAME=>'member_id',METHOD=>'delete'}

ERROR: Table memberis enabled. Disable it first before altering.

报错，删除列族的时候必须先将表给disable掉。
hbase(main):004:0>disable 'member'
0 row(s) in 2.0390seconds
hbase(main):005:0>alter'member',NAME=>'member_id',METHOD=>'delete'
0 row(s) in 0.0560seconds
hbase(main):006:0>describe 'member'
DESCRIPTION                                                                                        ENABLED
{NAME => 'member', FAMILIES => [{NAME=> 'address', BLOOMFILTER => 'NONE', REPLICATION_SCOPE => '0',false
  VERSIONS => '3', COMPRESSION => 'NONE',TTL => '2147483647', BLOCKSIZE => '65536', IN_MEMORY => 'fa
lse', BLOCKCACHE => 'true'}, {NAME =>'info', BLOOMFILTER => 'NONE', REPLICATION_SCOPE => '0', VERSI
ONS => '3', COMPRESSION => 'NONE', TTL=> '2147483647', BLOCKSIZE => '65536', IN_MEMORY => 'false',
BLOCKCACHE => 'true'}]}
1 row(s) in 0.0230seconds
该列族已经删除，我们继续将表enable
hbase(main):008:0> enable 'member'
0 row(s) in 2.0420seconds

4.列出所有的表
hbase(main):028:0>list
TABLE
member
temp_table
2 row(s) in 0.0150seconds

5.drop一个表
hbase(main):029:0>disable 'temp_table'
0 row(s) in 2.0590seconds

hbase(main):030:0>drop 'temp_table'
0 row(s) in 1.1070seconds

6.查询表是否存在
hbase(main):021:0>exists 'member'
Table member doesexist
0 row(s) in 0.1610seconds

7.判断表是否enable
hbase(main):034:0>is_enabled 'member'
true
0 row(s) in 0.0110seconds

8.判断表是否disable
hbase(main):032:0>is_disabled 'member'
false
0 row(s) in 0.0110seconds

来源：

HBase Shell常用命令
http://www.aboutyun.com/thread-6151-1-1.html