FYI - here's an APAR describing the new function: http://www-01.ibm.com/support/docview.wss?uid=isg1OA25204
What is interesting to me is that it looks like the word containing the record length *does not* add 4 for the length of the prefix word itself. This is astonishing, since it is otherwise identical to the Extended Logical Record Interface (XLRI) added in 1.10. The 1.10 "Macro Instructions for Datasets" manual says: "Extended Logical Record Interface (XLRI): When the GET macro is used in XLRI mode, the address returned in register 1 points to a fullword record length value. The 3 low-order bytes of the fullword indicate the length of the complete logical record plus 4 bytes for the fullword." Kirk Wolf Dovetailed Technologies http://dovetail.com On Wed, Sep 9, 2009 at 11:22 AM, Paul Gilmartin <[email protected]>wrote: > On Wed, 9 Sep 2009 12:59:34 -0300, Clark Morris wrote: > >>> > > >>> Sigh. Conway's law strikes again. > >> > >>Yeah - why IBM didn't make FILEDATA=RECORD have the same format as VB > really upsets me. This new one basically prefixes a logical record with a > fullword length in the range of 0..1677215 instead of VB's LLBB (where BB is > usually x'0000'). <sigh> > > > >Given the length of some open system records, 16 meg is a big > >improvement over 32K(take a look at the size of an average JPEG let > >alone TIFF graphics) but I think that it probably is too small for the > >future. Calculate the size of a RAW format picture on a 24 megapixel > >camera. Data size has grown over the years and we have outgrown the > >1960's record and blocksize limitations. > > > Yeah - why IBM didn't make FILEDATA=RECORD have the same format as VBS > really upsets me. > > What access method are they thinking of that supports 16 MiB records? > > -- gil > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to [email protected] with the message: GET IBM-MAIN INFO > Search the archives at http://bama.ua.edu/archives/ibm-main.html > ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
