Note that the data of the files in a DIRCONTROL directory are NOT paged to/from CP paging areas; When referenced, CP directly pages them in from the SFS minidisks (when the dataspace is constrcuted, the SFS server tells CP which page in the dataspace corresponds to which minidisk block). The storage used by the FST's will be backed by CP's paging area's.
A reason to only place only seldom changed files in a DIRC is that each time a file is changed, an ACCESS of the DIRC will cause a new dataspace being created. The ultimate, bad, result for a DIRC that is frequently changed is that every user of it would have its own copy. QUERY ACCESSORS dirid (DATASPACE will tell you how many different levels are active at a given time. 2007/7/16, Michael Coffin <[EMAIL PROTECTED]>:
Hi DK, Wow, so if I have a DIRCONTROL directory with 100Gb of data, I'd need to have enough storage (main, expanded and paging) for the ENTIRE 100Gb + FSTs? Darn, I can't see how Dataspaces could be effectively used except in situations where you have very small directories/contents and/or very large total storage. I do see the advantage of the XC machines "sharing" the contents, and in using the paging I/O routines - but the OVERALL price would just be too high for what I had intended it for. Maybe I can do this for just a few smaller but often referenced directories. Michael Coffin, President MC Consulting Company, Inc. 57 Tamarack Drive Stoughton, Massachusetts 02072
-- Kris Buelens, IBM Belgium, VM customer support
