> -----Ursprungligt meddelande----- > Från: IBM Mainframe Discussion List > [mailto:ibm-m...@bama.ua.edu] För Paul Gilmartin > Skickat: den 11 september 2009 17:24 > Till: IBM-MAIN@bama.ua.edu > Ämne: Re: SV: CLIST/REXX Library Formats > > On Fri, 11 Sep 2009 10:35:48 -0400, P S wrote: > > >On Fri, Sep 11, 2009 at 10:19 AM, Thomas Berg wrote: > >> <SNIP> > >> Somewhat OT: I have the experience that VB files (lrecl>1000 at > >> least) have *much* worse prestanda than FB files in the > ISPF editor. > >> Anyone with the same or other experience ? > > > >"prestanda" is Swedish for "performance" (to save the rest > of you from > >having to look it up!) > > > Is this comparing RECFM=VB to RECFM=FB with equivalent data length? > I have long believed that this is because ISPF (and XEDIT) > really don't understand variable length records; rather they > pad each record with blanks on input to the maximum length; > proceed as for FB; then strip trailing blanks on SAVE. > Further evidence: it's surprisingly easy to overflow > available REGION with a fairly small (on DASD) RECFM=VB file > with only one very long record and many short records. >
(Sorry for mixing in swedish, I'm somewhat tired today.) If You with "data length" mean actual, existing data, not the "LRECL" of the dataset; then Yes. I'm using VB 32756/32760 as a way to "catch all" needs. When I then have 1000 rows in an existing member (this is a PDSE), it take someting like 3 seconds to repeat a row. (Line command R.) Then length of the data in a row is max 80 bytes. This makes it somewhat unusable when You want/need to work fast. Which I normally do. Regards, Thomas Berg __________________________________________ Thomas Berg Specialist IT-U SWEDBANK ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
