Thanks, Tom, searching support.sas.com for 'extended format dataset' I found the following SAS note (from July 2003) which still seems to be valid:
<quote> In Version 8 of the SAS System, extended sequential data set format cannot be read or written using EXCP (Execute Channel Program) processing on disk. As a result, SAS data libraries in that format are not supported. This is not a SAS issue. IBM has made a deliberate design and decision not to provide EXCP support for extended sequential data sets on disk. Since SAS uses EXCP to process direct access bound libraries, the direct access bound libraries may not reside in extended format sequential data sets. Consequently, a direct access bound library may occupy at most 64K tracks on any given volume. </quote> So the maximum for SAS libraries would be around 210 GB? Anybody ever encountered a SAS library similarly large? (Mine max out at some 15GB). Thanks again Robert > Tom Harper > Gesendet: Dienstag, 17. April 2007 15:20 > > > Robert, > > If the application can support it, starting with z/OS > 1.7 you can have data sets larger than 65535 tracks per volume. > > Tom Harper > NEON Enterprise Software, Inc. > > -----Original Message----- > Robert Bardos > Sent: Tuesday, April 17, 2007 7:24 AM > > Fellow IBM-MAINers, > > a question regarding maximum dataset size (for a SAS library where > "SAS library" nowadays uses to be a PS dataset with RECFM=FS and > BLKSIZE=27648) popped up on SAS-L. > > I found some paragraphs in 'Using Data Sets' which say > > - multivolume datasets can extend to a maximum of 59 volumes > - maximum tracks per volume per dataset: 65535 tracks > > I didn't find however any remark mentioning maximum > size in bytes. > > Doing the math, > at a blocksize of 27648 that would make 2 blocks per track. > All in all 59 x 65535 x 2 x 27648 bytes or > 213,805,578,240 bytes. > > Would that be the correct (theoretical) maximum dataset > size for a > dataset with aforementioned characteristics? > > > TIA > > Robert Bardos > Ansys AG, Zurich, Switzerland ---------------------------------------------------------------------- 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
