我如何使用HBASE Shell创建预分割和压缩或其他选项的表格 [英] How can I use the HBASE Shell to create a table with pre splitting and compression or other options

问题描述

在HBase shell中，帮助文件告诉我们有几种允许的语法来创建表：

  create' tableName'，{NAME => 'colFamily'，版本=> 5} 
创建'tableName'，{NAME => 'cf1'}，{NAME => 'cf2'} 
创建'tableName'，'cf1'，'cf2'，'cf3'
创建'tableName'，'cf1'，{SPLITS => ['10'，'20'，'30'，'40']} 
  

我想创建一个表，在其中指定Split和一些表选项，如COMPRESSION =>'SNAPPY'和VERSIONS，但我似乎无法弄清楚语法或找到有用的文档。

<在实验之后最终变得清晰的是，Shell语法将接受一系列Column Family字典，而SPLIT字典实际上是它自己的动物（这是有道理的它修改了整个表格，而不仅仅是一个特定的列族。

因此，另一个有用的示例是：

  create'tableName'，{NAME =>'colFam'，VERSIONS => 2，COMPRESSION =>'SNAPPY'}，
 {SPLITS => ['333'，'666'，'FOO']} 
  

请注意，split字典是分开的从列家字典中;大概我们仍然可以输入一组列然后以Splits字典结尾。

In the HBase shell, the help file shows us that there are several allowable syntaxes for creating a table:

 create 'tableName', {NAME => 'colFamily', VERSIONS => 5 }
 create 'tableName', {NAME => 'cf1'}, {NAME => 'cf2'}
 create 'tableName', 'cf1', 'cf2', 'cf3'
 create 'tableName', 'cf1', {SPLITS => ['10','20','30','40']}

I want to make a table where I specify both a Split and a some table options, like COMPRESSION => 'SNAPPY' and VERSIONS, but I can't seem to figure out the syntax or find useful documentation.

解决方案

What eventually became clear after experimentation was that the Shell syntax will accept a set of Column Family dictionaries, and the SPLIT dictionary is really its own animal (which makes sense as it modifies the whole table, not just a particular column family.

So an additional useful example to have would be:

 create 'tableName', {NAME => 'colFam', VERSIONS => 2, COMPRESSION => 'SNAPPY'}, 
    {SPLITS => ['333','666','FOO']}

Note that the splits dictionary is separate from the column family dictionary; presumably we could still enter a set of column families and then end with the Splits dictionary.

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