Unicenter CA-QuickFetch Getting Started

What Are the Features of Unicenter CA-QuickFetch?■■Unicenter CA-QuickFetch provides complete, reliable,automatic update detection. You can discontinue use of theLibrary Lookaside (LLA) for managing load modules.Unlike Library Lookaside, Unicenter CA-QuickFetch doesnot allocate a library with DISP=SHR the entire time that itis being managed. This allows for utilities, such as a librarycompress, to be performed without removing the libraryfrom management.What Are the Features of UnicenterCA-QuickFetch?Unicenter CA-QuickFetch offers the following features that helpreduce the amount of DASD I/O that is normally associatedwith program loading.The Unicenter CA-QuickFetch Virtual Storage AreaUnicenter CA-QuickFetch maintains its own virtual storage area.This area normally occupies one address space; however, youcan run multiple Unicenter CA-QuickFetch address spaces ifyou want to. For details on doing this, see Multiple AddressSpaces in this chapter.By default, Unicenter CA-QuickFetch manages all LNKLSTlibraries. In addition, it automatically determines which privatelibraries it should manage based on their loading activity. It thenuses a fetch activity list (see The Fetch Activity List in thischapter) to determine which modules from these libraries areaccessed most frequently. It can recognize modules with thesame name that are in different libraries. It maintains a copy ofthese modules in its virtual storage area. UnicenterCA-QuickFetch resolves requests for these modules bytransferring the modules from its own virtual storage to thevirtual storage of the program requestor.Product Overview 1–9