space compression的意思|示意

Data compression utilities allow users to reduce the space required.

数据压缩程序可以使用户减少所需空间。

NULL values are stored with only three bytes, if value compression is active. You can expect space savings especially for numeric values.

如果激活值压缩，则null值的存储只需3个字节。

You can use the SQL statement in Listing 1 below to determine whether setting the table attribute value compression will save space for a table concerned by using the row format of value compression.

可以使用下面清单1中的sql语句来确定，通过设置表属性VALUE COMPRESSION，是否可以因使用值压缩的行格式而节省表的空间。

For example, you can use compression to save media space, use cloning to duplicate the archive for safety reasons, or restore the data onto another server instance.

比如，可以通过压缩来节约介质空间；或者出于安全的原因，通过克隆来复制存档；再或者将数据恢复到其他服务器实例中。

DB2 row compression was designed to reduce disk storage space requirements of database objects.

DB 2行压缩被设计用来减少数据库对象的磁盘存储空间需求。

Patterns in the data: the frequency of recurring patterns in the data determines how effective compression will be for a particular table space or partition.

数据中的模式：对于特定的表空间或分区，数据中重复出现的模式的出现频率将决定压缩的效果。