Barracuda文件格式和Antelope的區別

Barracuda文件格式和Antelope的區別

/** There are currently two InnoDB fileformats which are used to group

features with similar restrictions anddependencies. Using an enum allows

switch statements to give a compilerwarning when a new one is introduced. */

enum innodb_file_formats_enum {

/**Antelope File Format: InnoDB/MySQL up to 5.1.

Thisformat includes REDUNDANT and COMPACT row formats */

UNIV_FORMAT_A =0,



/**Barracuda File Format: Introduced in InnoDB plugin for 5.1:

Thisformat includes COMPRESSED and DYNAMIC row formats. It

includesthe ability to create secondary indexes from data that

isnot on the clustered index page and the ability to store more

dataoff the clustered index page. */

UNIV_FORMAT_B =1

};

Barracuda文件格式由innodb5.1引入，包括compressed和dynamic文件格式。Barracuda與Antelope的區別在於barracuda可以在不在聚集索引頁的數據上創建二級索引，並且能存更多數據在溢出頁。