On Wed, 3 Oct 2018 07:30:09 +0200, Peter Hunkeler wrote: >>Are you sure space is reclaimed for deleted members if the data set is open >>by LNKLST? > >Interesting question. Easy to test for someone with a sandbox system (I don't >have any such to play with). Well, one could test with STEPLIB but that does >not tell anything, if there was special code in PDSE processing to recognize >the data set is in linklist usage (I doubt there is, but who knows?) >I would assume that the space is reclaimed not matter whether the data set is >open or not. > Can't space be reclaimed even from an open data set provided that the members are DISCONNECTed by STOW?
o But DISCONNECT makes the pseudo-TTR invalid, so the directory must be searched again for the member. LLA would provide no benefit. o Absent DISCONNECT, the space would not be reclaimed. o Indexed PDSE directories may provide some of the performance benefit of LLA If a programmer reads the (simulated?) PDS directory of a PDSE as PS, does that create a connection to every member returned? -- gil ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
