HBase创建表参数说明

HBase创建表参数

> create_namespace 'dimensoft'

> create 'dimensoft:user', 'info'

> describe 'dimensoft:user'

DESCRIPTION
'dimensoft:user', //namespace:tableName
{
NAME => 'info', //列族

DATA_BLOCK_ENCODING => 'NONE', //数据块编码方式设置
//参见：http://hbase.apache.org/book.html#data.block.encoding.enable

BLOOMFILT => 'ROW', //参见：http://hbase.apache.org/book.html#bloom.filters.when

REPLICATION_SCOPE => '0', //配置HBase集群replication时需要将该参数设置为1.

//参见：http://blog.cloudera.com/blog/2012/08/hbase-replication-operational-overview/?utm_source=tuicool
'REPLICATION_SCOPE is a column-family level attribute
user has to alter each column family with the alter command as
shown above, for all the column families he wants to replicate.'

VERSIONS => '1', //设置保存的版本数

COMPRESSION => 'NONE', //设置压缩算法

MIN_VERSIONS => '0', //最小存储版本数

TTL => 'FOREVER', //参见：http://hbase.apache.org/book.html#ttl
'ColumnFamilies can set a TTL length in seconds, and HBase
reached. This applies to all versions of a row - even the current one.
The TTL time encoded in the HBase for the row is specified in
UTC.'

KEEP_DELETED_CELLS => 'false', //参见：http://hbase.apache.org/book.html#cf.keep.deleted

BLOCKSIZE => '65536', //设置HFile数据块大小（默认64kb）

IN_MEMORY => 'false',//设置激进缓存，优先考虑将该列族放入块缓存中，
//针对随机读操作相对较多的列族可以设置该属性为true

BLOCKCACHE => 'true' //数据块缓存属性
}