• HBase操作(Shell与Java API)


     
     

    转: http://blog.csdn.net/u013980127/article/details/52443155

    下面代码在Hadoop 2.6.4 + Hbase 1.2.2 + centos 6.5 + jdk 1.8上运行通过。

    HBase操作

    一般操作

    命令说明
    status 显示集群状态. 选项:‘summary’, ‘simple’, or ‘detailed’. 默认值:‘summary’. 
    hbase> status 
    hbase> status ‘simple’ 
    hbase> status ‘summary’ 
    hbase> status ‘detailed’
    version 显示版本。
    hbase> version
    whoami 显示当前用户与组。
    hbase> whoami

    表管理

    1. alter

    修改表结构必须先disable

    Shell:

    语法:alter 't1', {NAME => 'f1'}, {NAME => 'f2', METHOD => 'delete'}
    必须指定列族。示例:
    表t1的列族f1,修改或增加VERSIONS为5
    
    hbase> alter ‘t1’, NAME => ‘f1’, VERSIONS => 5
    
    也可以同时修改多个列族:
    
    hbase> alter ‘t1’, ‘f1’, {NAME => ‘f2’, IN_MEMORY => true}, {NAME => ‘f3’, VERSIONS => 5}
    
    删除表t1的f1列族:
    
    hbase> alter ‘t1’, NAME => ‘f1’, METHOD => ‘delete’
    或
    hbase> alter ‘t1’, ‘delete’ => ‘f1’
    
    也可以修改table-scope属性,例如MAX_FILESIZE, READONLY,
    MEMSTORE_FLUSHSIZE, DEFERRED_LOG_FLUSH等。
    例如,修改region的最大大小为128MB:
    
    hbase> alter ‘t1’, MAX_FILESIZE => ‘134217728’
    
    也可以设置表的coprocessor属性:
    
    hbase> alter ‘t1’,
    ‘coprocessor’=>’hdfs:///foo.jar|com.foo.FooRegionObserver|1001|arg1=1,arg2=2’
    
    可以设置复数个coprocessor,这时会自动添加序列以唯一标示coprocessor。
    
    coprocessor属性设置语法:
    [coprocessor jar file location] | class name | [priority] | [arguments]
    
    也可以设置configuration给表或列族:
    
    hbase> alter ‘t1’, CONFIGURATION => {‘hbase.hregion.scan.loadColumnFamiliesOnDemand’ => ‘true’}
    hbase> alter ‘t1’, {NAME => ‘f2’, CONFIGURATION => {‘hbase.hstore.blockingStoreFiles’ => ’10’}}
    
    也可以移除table-scope属性:
    
    hbase> alter ‘t1’, METHOD => ‘table_att_unset’, NAME => ‘MAX_FILESIZE’
    
    hbase> alter ‘t1’, METHOD => ‘table_att_unset’, NAME => ‘coprocessor$1’
    
    可以通过一个命令进行多项修改:
    
    hbase> alter ‘t1’, { NAME => ‘f1’, VERSIONS => 3 },
    { MAX_FILESIZE => ‘134217728’ }, { METHOD => ‘delete’, NAME => ‘f2’ },
    OWNER => ‘johndoe’, METADATA => { ‘mykey’ => ‘myvalue’ }
    
    

    Java实现:

    /**
     * 修改表结构,增加列族
     *
     * @param tableName 表名
     * @param family    列族
     *
     * @throws IOException
     */
    public static void putFamily(String tableName, String family) throws IOException {
        try (Connection connection = ConnectionFactory.createConnection(configuration);
             Admin admin = connection.getAdmin()
        ) {
            TableName tblName = TableName.valueOf(tableName);
            if (admin.tableExists(tblName)) {
                admin.disableTable(tblName);
                HColumnDescriptor cf = new HColumnDescriptor(family);
                admin.addColumn(TableName.valueOf(tableName), cf);
                admin.enableTable(tblName);
            } else {
                log.warn(tableName + " not exist.");
            }
        }
    }
    
    # 调用示例
    putFamily("blog", "note");
    

      

    2. create

    创建表。

    Shell:

    语法:
    create 'table', { NAME => 'family', VERSIONS => VERSIONS } [, { NAME => 'family', VERSIONS => VERSIONS }]
    
    示例:
    
    hbase> create ‘t1’, {NAME => ‘f1’, VERSIONS => 5}
    hbase> create ‘t1’, {NAME => ‘f1’}, {NAME => ‘f2’}, {NAME => ‘f3’}
    hbase> # The above in shorthand would be the following:
    hbase> create ‘t1’, ‘f1’, ‘f2’, ‘f3’
    hbase> create ‘t1’, {NAME => ‘f1’, VERSIONS => 1, TTL => 2592000, BLOCKCACHE => true}
    hbase> create ‘t1’, {NAME => ‘f1’, CONFIGURATION => {‘hbase.hstore.blockingStoreFiles’ => ’10’}}
    
    

    Java示例:

    /**
     * 创建表
     *
     * @param tableName   表名
     * @param familyNames 列族
     *
     * @throws IOException
     */
    public static void createTable(String tableName, String[] familyNames) throws IOException {
    
        try (Connection connection = ConnectionFactory.createConnection(configuration);
             Admin admin = connection.getAdmin()
        ) {
            TableName table = TableName.valueOf(tableName);
            if (admin.tableExists(table)) {
                log.info(tableName + " already exists");
            } else {
                HTableDescriptor hTableDescriptor = new HTableDescriptor(table);
                for (String family : familyNames) {
                    hTableDescriptor.addFamily(new HColumnDescriptor(family));
                }
                admin.createTable(hTableDescriptor);
            }
        }
    }
    
    # 调用例
    createTable("blog", new String[]{"author", "contents"});

    3. describe

    查询表结构

    hbase> describe ‘t1’

    4. disable

    无效化指定表

    hbase> disable ‘t1’

    5. disable_all

    无效化(正则)匹配的表

    hbase> disable_all ‘t.*’

    6. is_disabled

    验证指定的表是否是无效的

    hbase> is_disabled ‘t1’

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    7. drop

    删除表。表必须是无效的。

    Shell:

    hbase> drop ‘t1’
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    Java实现:

    /**
     * 删除表
     *
     * @param tableName 表名
     *
     * @throws IOException
     */
    public static void dropTable(String tableName) throws IOException {
    
        try (Connection connection = ConnectionFactory.createConnection(configuration);
             Admin admin = connection.getAdmin()
        ) {
    
            TableName table = TableName.valueOf(tableName);
            if (admin.tableExists(table)) {
                admin.disableTable(table);
                admin.deleteTable(table);
            }
        }
    }
    
    #调用例
    dropTable("blog");

    8. drop_all

    删除所有正则匹配的表。

    hbase> drop_all ‘t.*’
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    9. enable

    使指定表有效化。

    hbase> enable ‘t1’
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    10. enable_all

    使正则匹配的所有表有效。

    hbase> enable_all ‘t.*’
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    11. is_enabled

    验证指定表是否有效

    hbase> is_enabled ‘t1’
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    12. exists

    指定表是否存在。

    hbase> exists ‘t1’
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    13. list

    列出HBase中所有表,可以通过正则过滤。

    hbase> list
    hbase> list ‘abc.*’
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    14. show_filters

    显示所有过滤器。

    hbase> show_filters
    
    hbase(main):066:0> show_filters
    DependentColumnFilter                                                           
    KeyOnlyFilter                                                                   
    ColumnCountGetFilter                                                            
    SingleColumnValueFilter                                                         
    PrefixFilter                                                                    
    SingleColumnValueExcludeFilter                                                  
    FirstKeyOnlyFilter                                                              
    ColumnRangeFilter                                                               
    TimestampsFilter                                                                
    FamilyFilter                                                                    
    QualifierFilter                                                                 
    ColumnPrefixFilter                                                              
    RowFilter                                                                       
    MultipleColumnPrefixFilter                                                      
    InclusiveStopFilter                                                             
    PageFilter                                                                      
    ValueFilter                                                                     
    ColumnPaginationFilter  

    15. alter_status

    获取alter执行的状态。 
    语法:alter_status ‘tableName’

    hbase> alter_status ‘t1’
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    16. alter_async

    异步执行alter,通过alter_status获取执行状态。

    数据操作

    1. count

    统计表的行数。

    Shell:

    该操作执行的时间可能会比较长 (运行mapreduce执行统计 '$HADOOP_HOME/bin/hadoop jar hbase.jar rowcount'). 
    默认每1000行(可以指定步数)显示当前总行数。Scan
    caching默认开启,默认大小为10,也可以设置:
    
    hbase> count ‘t1’
    hbase> count ‘t1’, INTERVAL => 100000
    hbase> count ‘t1’, CACHE => 1000
    hbase> count ‘t1’, INTERVAL => 10, CACHE => 1000
    
    也可以通过表的引用执行:
    
    hbase> t.count
    hbase> t.count INTERVAL => 100000
    hbase> t.count CACHE => 1000
    hbase> t.count INTERVAL => 10, CACHE => 1000
    
    

    Java实现:

    /**
     * 统计行数
     *
     * @param tableName 表名
     *
     * @return 行数
     *
     * @throws IOException
     */
    public static long count(String tableName) throws IOException {
    
        final long[] rowCount = {0};
    
        try (Connection connection = ConnectionFactory.createConnection(configuration);
             Table table = connection.getTable(TableName.valueOf(tableName))
        ) {
            Scan scan = new Scan();
            scan.setFilter(new FirstKeyOnlyFilter());
            ResultScanner resultScanner = table.getScanner(scan);
            resultScanner.forEach(result -> {
                rowCount[0] += result.size();
            });
        }
        System.out.println("行数: " + rowCount[0]);
        return rowCount[0];
    }
    
    #调用示例
    count("blog");

    2. delete

    删除指定数据。

    Shell:

    语法:delete 'table', 'rowkey',  'family:column' [, 'timestamp']
    删除t1表的r1行、c1列并且时间戳为ts1的数据:
    
    hbase> delete ‘t1’, ‘r1’, ‘c1’, ts1
    
    也可以通过表引用调用该命令:
    
    hbase> t.delete ‘r1’, ‘c1’, ts1
    
    

    Java实现:

    /**
     * 删除指定数据
     * <p>
     * columns为空, 删除指定列族的全部数据;
     * family为空时, 删除指定行键的全部数据;
     * </p>
     *
     * @param tableName 表名
     * @param rowKey    行键
     * @param family    列族
     * @param columns   列集合
     *
     * @throws IOException
     */
    public static void deleteData(String tableName, String rowKey, String family, String[] columns)
            throws IOException {
        try (Connection connection = ConnectionFactory.createConnection(configuration);
             Table table = connection.getTable(TableName.valueOf(tableName))
        ) {
            Delete delete = new Delete(Bytes.toBytes(rowKey));
    
            if (null != family && !"".equals(family)) {
                if (null != columns && columns.length > 0) { // 删除指定列
                    for (String column : columns) {
                        delete.addColumn(Bytes.toBytes(family), Bytes.toBytes(column));
                    }
                } else { // 删除指定列族
                    delete.addFamily(Bytes.toBytes(family));
                }
            } else { // 删除指定行
                // empty, nothing to do
            }
            table.delete(delete);
        }
    }
    
    # 调用示例
    deleteData("blog", "rk12", "author", new String[] { "name", "school" });
    deleteData("blog", "rk11", "author", new String[] { "name" });
    deleteData("blog", "rk10", "author", null);
    deleteData("blog", "rk9", null, null);

    3. deleteall

    删除行。

    语法:deleteall 'tableName', 'rowkey' [, 'column', 'timestamp']
    
    hbase> deleteall ‘t1’, ‘r1’
    hbase> deleteall ‘t1’, ‘r1’, ‘c1’
    hbase> deleteall ‘t1’, ‘r1’, ‘c1’, ts1
    
    也可以通过表引用调用该命令:
    
    hbase> t.deleteall ‘r1’
    hbase> t.deleteall ‘r1’, ‘c1’
    hbase> t.deleteall ‘r1’, ‘c1’, ts1
    
    

    4. get

    获取某行数据。

    Shell:

    语法:
    get 'tableName', 'rowkey',[,....]
    选项包括:列集合、时间戳、时间范围或版本
    示例:
    
    hbase> get ‘t1’, ‘r1’
    hbase> get ‘t1’, ‘r1’, {TIMERANGE => [ts1, ts2]}
    hbase> get 'blog', 'rk1', 'author:name'
    hbase>get 'blog', 'rk1', { COLUMN => 'author:name' }
    hbase> get ‘t1’, ‘r1’, {COLUMN => ‘c1’, TIMESTAMP => ts1}
    hbase> get ‘t1’, ‘r1’, {COLUMN => ‘c1’, TIMERANGE => [ts1, ts2], VERSIONS => 4}
    hbase> get ‘t1’, ‘r1’, {COLUMN => ‘c1’, TIMESTAMP => ts1, VERSIONS => 4}
    hbase> get ‘t1’, ‘r1’, {FILTER => “ValueFilter(=, ‘binary:abc’)”}
    hbase> get ‘t1’, ‘r1’, ‘c1’
    hbase> get ‘t1’, ‘r1’, ‘c1’, ‘c2’
    hbase> get ‘t1’, ‘r1’, [‘c1’, ‘c2’]
    
    也可以在列上指定FORMATTER,默认toStringBinary。
    可以使用org.apache.hadoop.hbase.util.Bytes中预定义的方法 (例如:toInt, toString) ;
    也可以自定义方法:'c(MyFormatterClass).format'。
    例如 cf:qualifier1 and cf:qualifier2:
    
    hbase> get ‘t1’, ‘r1’ {COLUMN => [‘cf:qualifier1:toInt’,
    ‘cf:qualifier2:c(org.apache.hadoop.hbase.util.Bytes).toInt’] }
    
    注:只能在列上指定FORMATTER,不能针对列族的所有列。
    
    表的引用(通过get_table or
    create_table获得引用)也可以使用get命令,例如
    t是表t1的引用(t = get_table 't1'),则:
    
    hbase> t.get ‘r1’
    hbase> t.get ‘r1’, {TIMERANGE => [ts1, ts2]}
    hbase> t.get ‘r1’, {COLUMN => ‘c1’}
    hbase> t.get ‘r1’, {COLUMN => [‘c1’, ‘c2’, ‘c3’]}
    hbase> t.get ‘r1’, {COLUMN => ‘c1’, TIMESTAMP => ts1}
    hbase> t.get ‘r1’, {COLUMN => ‘c1’, TIMERANGE => [ts1, ts2], VERSIONS => 4}
    hbase> t.get ‘r1’, {COLUMN => ‘c1’, TIMESTAMP => ts1, VERSIONS => 4}
    hbase> t.get ‘r1’, {FILTER => “ValueFilter(=, ‘binary:abc’)”}
    hbase> t.get ‘r1’, ‘c1’
    hbase> t.get ‘r1’, ‘c1’, ‘c2’
    hbase> t.get ‘r1’, [‘c1’, ‘c2’]
    
    

    Java实现:

    /**
     * 获取指定数据
     * <p>
     * column为空, 检索指定列族的全部数据;
     * family为空时, 检索指定行键的全部数据;
     * </p>
     *
     * @param tableName 表名
     * @param rowKey    行键
     * @param family    列族
     * @param columns   列名集合
     *
     * @throws IOException
     */
    public static void getData(String tableName, String rowKey, String family, String[] columns)
            throws IOException {
    
        try (Connection connection = ConnectionFactory.createConnection(configuration);
             Table table = connection.getTable(TableName.valueOf(tableName))
        ) {
            Get get = new Get(Bytes.toBytes(rowKey));
            Result result = table.get(get);
            if (null != family && !"".equals(family)) {
                if (null != columns && columns.length > 0) { // 表里指定列族的列值
                    for (String column : columns) {
                        byte[] rb = result.getValue(Bytes.toBytes(family), Bytes.toBytes(column));
                        System.out.println(Bytes.toString(rb));
                    }
                } else { // 指定列族的所有值
                    Map<byte[], byte[]> columnMap = result.getFamilyMap(Bytes.toBytes(family));
                    for (Map.Entry<byte[], byte[]> entry : columnMap.entrySet()) {
                        System.out.println(Bytes.toString(entry.getKey())
                                + " "
                                + Bytes.toString(entry.getValue()));
                    }
                }
            } else { // 指定行键的所有值
                Cell[] cells = result.rawCells();
                for (Cell cell : cells) {
                    System.out.println("family => " + Bytes.toString(cell.getFamilyArray(), cell.getFamilyOffset(), cell.getFamilyLength()) + "
    "
                            + "qualifier => " + Bytes.toString(cell.getQualifierArray(), cell.getQualifierOffset(), cell.getQualifierLength()) + "
    "
                            + "value => " + Bytes.toString(cell.getValueArray(), cell.getValueOffset(), cell.getValueLength()));
                }
            }
    
        }
    }
    
    # 调用示例
    getData("blog", "rk1", null, null);
    getData("blog", "rk1", "author", null);
    getData("blog", "rk1", "author", new String[] { "name", "school" });

    5. get_counter

    获取计数器的值。

    语法:get_counter 'tableName', 'row', 'column'
    示例:
    
    hbase> get_counter ‘t1’, ‘r1’, ‘c1’
    
    同样,也可以在表引用上使用:
    
    hbase> t.get_counter ‘r1’, ‘c1’
    
    

    6. incr

    计数器

    Shell:

    语法:incr 'tableName', 'row', 'column', value
    例如:表t1的r1行c1列增加1(可省略),或10:
    
    hbase> incr ‘t1’, ‘r1’, ‘c1’
    hbase> incr ‘t1’, ‘r1’, ‘c1’, 1
    hbase> incr ‘t1’, ‘r1’, ‘c1’, 10
    
    同样,也可以在表引用上使用
    
    hbase> t.incr ‘r1’, ‘c1’
    hbase> t.incr ‘r1’, ‘c1’, 1
    hbase> t.incr ‘r1’, ‘c1’, 10
    
    

    Java实现:

    /**
     * 计数器自增
     *
     * @param tableName 表名
     * @param rowKey    行键
     * @param family    列族
     * @param column    列
     * @param value     增量
     *
     * @throws IOException
     */
    public static void incr(String tableName, String rowKey, String family, String column,
                            long value) throws IOException {
        try (Connection connection = ConnectionFactory.createConnection(configuration);
             Table table = connection.getTable(TableName.valueOf(tableName))
        ) {
            long count = table.incrementColumnValue(Bytes.toBytes(rowKey), Bytes.toBytes(family),
                    Bytes.toBytes(column), value);
            System.out.println("增量后的值: " + count);
        }
    }
    
    #调用示例
    incr("scores", "lisi", "courses", "eng", 2);

    7. put

    插入数据。

    Shell:

    语法:put 'table','rowkey','family:column','value'[,'timestamp']
    例如:插入表t1,行r1,列c1,时间戳ts1
    
    hbase> put ‘t1’, ‘r1’, ‘c1’, ‘value’, ts1
    
    
    同样,也可以在表引用上使用
    
    hbase> t.put ‘r1’, ‘c1’, ‘value’, ts1
    
    

    Java实现:

    /**
     * 插入数据
     *
     * @param tableName 表名
     * @param rowKey    行键
     * @param familys   列族信息(Key: 列族; value: (列名, 列值))
     */
    public static void putData(String tableName, String rowKey, Map<String, Map<String, String>> familys)
            throws IOException {
    
        try (Connection connection = ConnectionFactory.createConnection(configuration);
             Table table = connection.getTable(TableName.valueOf(tableName))
        ) {
            Put put = new Put(Bytes.toBytes(rowKey));
    
            for (Map.Entry<String, Map<String, String>> family : familys.entrySet()) {
                for (Map.Entry<String, String> column : family.getValue().entrySet()) {
                    put.addColumn(Bytes.toBytes(family.getKey()),
                            Bytes.toBytes(column.getKey()), Bytes.toBytes(column.getValue()));
                }
            }
            table.put(put);
        }
    }
    
    # 调用例
    // 行键1
    Map<String, Map<String, String>> map1 = new HashMap<>();
    // 列族author的列值
    Map<String, String> author1 = new HashMap<>();
    author1.put("name", "张三");
    author1.put("school", "MIT");
    map1.put("author", author1);
    // 列族contents的列值
    Map<String, String> contents1 = new HashMap<>();
    contents1.put("content", "吃饭了吗?");
    map1.put("contents", contents1);
    putData("blog", "rk1", map1);

    8. scan

    扫描全表。

    语法:scan 'table' [, {COLUMNS => [ 'family:column', .... , LIMIT => num} ]
    可以使用以下限定词:
    TIMERANGE, FILTER, LIMIT, STARTROW, STOPROW, TIMESTAMP, MAXLENGTH,
    , COLUMNS, CACHE。
    如果没有限定词,则扫描全表。
    列族的列指定为空时,扫描列族中全部数据('col_family:')。
    指定过滤条件有两种方式:
    1. 使用过滤字符串 – 详细见[HBASE-4176 JIRA](https://issues.apache.org/jira/browse/HBASE-4176)
    2. 使用过滤器的整个包名称。
    
    示例如下:
    
    hbase> scan ‘.META.’
    hbase> scan ‘.META.’, {COLUMNS => ‘info:regioninfo’}
    hbase> scan ‘t1’, {COLUMNS => [‘c1’, ‘c2’], LIMIT => 10, STARTROW => ‘xyz’}
    hbase> scan ‘t1’, {COLUMNS => ‘c1’, TIMERANGE => [1303668804, 1303668904]}
    hbase> scan ‘t1’, {FILTER => “(PrefixFilter (‘row2’) AND
    (QualifierFilter (>=, ‘binary:xyz’))) AND (TimestampsFilter ( 123, 456))”}
    hbase> scan ‘t1’, {FILTER =>
    org.apache.hadoop.hbase.filter.ColumnPaginationFilter.new(1, 0)}
    
    CACHE_BLOCKS:切换block caching,默认可用。
    示例:
    
    hbase> scan ‘t1’, {COLUMNS => [‘c1’, ‘c2’], CACHE_BLOCKS => false}
    
    
    RAW:扫描返回所有数据 (包括delete markers和uncollected deleted)。
    该选项不能和指定COLUMNS共用。默认disable。
    示例:
    
    hbase> scan ‘t1’, {RAW => true, VERSIONS => 10}
    
    默认使用toStringBinary格式化,scan支持对列的自定义格式化。
    FORMATTER约定:
    
    1. 使用org.apache.hadoop.hbase.util.Bytes的方法(例如toInt, toString);
    2. 使用自定义类的方法例如'c(MyFormatterClass).format'。
    
    例如 cf:qualifier1 和 cf:qualifier2:
    hbase> scan ‘t1’, {COLUMNS => [‘cf:qualifier1:toInt’,
    ‘cf:qualifier2:c(org.apache.hadoop.hbase.util.Bytes).toInt’] }
    
    注:只能指定列的FORMATTER,不能指定列族中所有列的FORMATTER。
    
    可以使用表的引用调用该方法:
    
    hbase> t = get_table ‘t’
    hbase> t.scan
    
    

    Java实现:

    /**
     * 全表扫描
     *
     * @param tableName 表名
     *
     * @throws IOException
     */
    public static void scan(String tableName) throws IOException {
        try (Connection connection = ConnectionFactory.createConnection(configuration);
             Table table = connection.getTable(TableName.valueOf(tableName))
        ) {
            Scan scan = new Scan();
            ResultScanner resultScanner = table.getScanner(scan);
            for (Result result : resultScanner) {
                List<Cell> cells = result.listCells();
                for (Cell cell : cells) {
                    System.out.println("row => " + Bytes.toString(CellUtil.cloneRow(cell)) + "
    "
                            + "family => " + Bytes.toString(CellUtil.cloneFamily(cell)) + "
    "
                            + "qualifier => " + Bytes.toString(CellUtil.cloneQualifier(cell)) + "
    "
                            + "value => " + Bytes.toString(CellUtil.cloneValue(cell)));
                }
            }
        }
    }
    
    # 调用示例
    scan("blog");

    9. truncate

    无效、删除并重新创建表。

    Shell:

    hbase>truncate ‘t1’
    • 1
    • 1

    Java示例:

    工具

    命令说明
    assign 分配region,如果region已经被分配,将强制重新分配。
    hbase> assign ‘REGION_NAME’
    balancer 触发集群均衡器。
    hbase> balancer
    balance_switch 切换均衡器。
    hbase> balance_switch true
    hbase> balance_switch false
    close_region 关闭region。
    hbase>close_region 'REGIONNAME', 'SERVER_NAME'
    compact Compact all regions in a table:
    hbase> compact ‘t1’
    Compact an entire region:
    hbase> compact ‘r1’
    Compact only a column family within a region:
    hbase> compact ‘r1’, ‘c1’
    Compact a column family within a table:
    hbase> compact ‘t1’, ‘c1’
    flush Flush all regions in passed table or pass a region row to flush an individual region. 
    For example:
    hbase> flush ‘TABLENAME’
    hbase> flush ‘REGIONNAME’
    major_compact Compact all regions in a table:
    hbase> major_compact ‘t1’
    Compact an entire region:
    hbase> major_compact ‘r1’
    Compact a single column family within a region:
    hbase> major_compact ‘r1’, ‘c1’
    Compact a single column family within a table:
    hbase> major_compact ‘t1’, ‘c1’
    move 随机移动到某region server
    hbase> move ‘ENCODED_REGIONNAME’
    移动region到指定的server
    hbase>move 'ENCODED_REGIONNAME', 'SERVER_NAME'
    split Split entire table or pass a region to split individual region. With the second parameter, you can specify an explicit split key for the region.
    Examples:
    split ‘tableName’
    split ‘regionName’ # format: ‘tableName,startKey,id’
    split ‘tableName’, ‘splitKey’
    split ‘regionName’, ‘splitKey’
    unassign Unassign a region. Unassign will close region in current location and then reopen it again. Pass ‘true’ to force the unassignment (‘force’ will clear all in-memory state in master before the reassign. If results in double assignment use hbck -fix to resolve. To be used by experts). Use with caution. For expert use only.
    Examples:
    hbase> unassign ‘REGIONNAME’
    hbase> unassign ‘REGIONNAME’, true
    hlog_roll Roll the log writer. That is, start writing log messages to a new file. The name of the regionserver should be given as the parameter. A ‘server_name’ is the host, port plus startcode of a regionserver. For example:
    host187.example.com,60020,1289493121758 (find servername in master ui or when you do detailed status in shell)
    hbase>hlog_roll
    zk_dump Dump status of HBase cluster as seen by ZooKeeper. Example:
    hbase>zk_dump

    集群复制

    命令说明
    add_peer Add a peer cluster to replicate to, the id must be a short and the cluster key is composed like this:
    hbase.zookeeper.quorum:hbase.zookeeper.property.clientPort:zookeeper.znode.parent This gives a full path for HBase to connect to another cluster.Examples:
    hbase>add_peer ‘1’, “server1.cie.com:2181:/hbase”
    hbase>add_peer ‘2’, “zk1,zk2,zk3:2182:/hbase-prod”
    remove_peer Stops the specified replication stream and deletes all the meta information kept about it. Examples:
    hbase> remove_peer ‘1’
    list_peers List all replication peer clusters.
    hbase> list_peers
    enable_peer Restarts the replication to the specified peer cluster, continuing from where it was disabled. Examples:
    hbase> enable_peer ‘1’
    disable_peer Stops the replication stream to the specified cluster, but still keeps track of new edits to replicate.Examples: 
    hbase> disable_peer ‘1’
    start_replication Restarts all the replication features. The state in which each stream starts in is undetermined. 
    WARNING: start/stop replication is only meant to be used in critical load situations. Examples:
    hbase> start_replication
    stop_replication Stops all the replication features. The state in which each stream stops in is undetermined. 
    WARNING: start/stop replication is only meant to be used in critical load situations. Examples: 
    hbase> stop_replication

    权限控制

    命令说明
    grant 授予用户指定权限. 
    语法:集合’RWXCA’中任意个字符。
    READ(‘R’)
    WRITE(‘W’)
    EXEC(‘X’)
    CREATE(‘C’)
    ADMIN(‘A’)
    例如:
    hbase> grant ‘bobsmith’, ‘RWXCA’
    hbase> grant ‘bobsmith’, ‘RW’, ‘t1’, ‘f1’, ‘col1’
    revoke 移除用户权限。
    语法:revoke
    hbase> revoke ‘bobsmith’, ‘t1’, ‘f1’, ‘col1’
    user_permission 显示用户权限。
    语法:user_permission ‘table’
    hbase> user_permission ‘table1’

    参考

    1. HBase shell scan 模糊查询

    2. HBase 5种写入数据方式

    3. HBase 常用Shell命令

    4. hbase 1.1.4增删查改demo

    5. java 获取 hbase数据 springdatahadoop – hbasetemplate

    6. HBase shell commands

    7. HBase Maven Dependency

    8. HBase内置过滤器的一些总结

    9. HBase(0.96以上版本)过滤器Filter详解及实例代码

    10. HBase java 统计表行数

    11. HBase之计数器

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  • 原文地址:https://www.cnblogs.com/seaspring/p/6504935.html
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