Setting Up ELIB Data Sets › ELIB Data Sets

ELIB Data Sets

An Endevor LIB (ELIB) is a high performance alternative to OS partitioned data sets under CA Endevor SCM. You can organize CA Endevor SCM base, delta, and listing libraries as ELIB data sets. Three concepts are important when working with ELIBs. These concepts are page size, record format, and target directory page.

• Page size: Specifies the size of the control interval used by ELIB for storage. All blocking is internal to ELIB and not available to operating system utilities. You cannot reblock an ELIB data set. If reblocking is necessary you must reallocate the data set and copy members into it.
• Record format: ELIB data sets store members in compressed format with the record length stored at the front of each record. This allows members of different record lengths to be stored in one ELIB data set.
• Target directory pages: ELIB locates members by going directly to one of its directory pages. If enough directory pages are allocated to avoid overflow, performance is enhanced.

  ELIB data sets allow you to allocate additional directory pages spontaneously, using the BC1PNLIB utility.

CA Endevor SCM provides three utilities for use when setting up and maintaining ELIB data sets. The following lists these utilities and the purpose of each:

BC1PNLIB

Set up, maintain, and print information about ELIB data sets.

BC1PNLST

Print information about ELIB data sets.

BC1PNCPY

Copy library members from and to ELIB data sets, and to copy members from and to any CA Endevor SCM library format.

Note: The ELIB utilities BC1PNLIB, BC1PNCPY and BC1PNLST cannot be executed within a CA Endevor SCM processor.