Alternate Index

Alternate index is used to access a vsam file by using alternate key.file processing is very fast.

Alternate Index is used to access the records from the file using alternate key, when there is no primary key avaliable. But using this index accessing the records is slow. Because, alternate index format is Alternate key and primary key. So by using alternate key we will get primary key from the Alternate Index file, from there we will search the file using the primary key. Using Alternate Index the accessing is slow.

  1 User has rated as useful.

  

Login to rate this answer.