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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’
1
7. drop
删除表。表必须是无效的。
Shell:
hbase> drop ‘t1’
- 1
- 1
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.*’
- 1
- 1
9. enable
使指定表有效化。
hbase> enable ‘t1’
- 1
- 1
10. enable_all
使正则匹配的所有表有效。
hbase> enable_all ‘t.*’
- 1
- 1
11. is_enabled
验证指定表是否有效
hbase> is_enabled ‘t1’
- 1
- 1
12. exists
指定表是否存在。
hbase> exists ‘t1’
- 1
- 1
13. list
列出HBase中所有表,可以通过正则过滤。
hbase> list
hbase> list ‘abc.*’
- 1
- 2
- 1
- 2
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’
- 1
- 1
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 serverhbase> 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’ |