The Google say "The number of data sets that you can concatenate with sequential concatenation is variable. It is governed by the maximum size of the TIOT option. The system programmer controls the TIOT size with the option ALLOCxx member of SYS1.PARMLIB. The smallest TIOT value allows 819 single-unit DD statements or 64 DD statements having the maximum number of units. See z/OS MVS Initialization and Tuning Reference."
"A sequential concatenation can include sequential data sets, PDS members, PDSE members, and UNIX files. With sequential concatenation, the system treats a PDS, PDSE, or UNIX member as if it were a sequential data set. The system treats a striped extended-format data set as if it were a single-volume data set. Rule: You cannot concatenate VSAM data sets." -- http://www.ibm.com/support/knowledgecenter/SSLTBW_2.1.0/com.ibm.zos.v2r1.idad400/seqcat.htm Charles -----Original Message----- From: IBM Mainframe Discussion List [mailto:[email protected]] On Behalf Of Mitch Mccluhan Sent: Monday, August 22, 2016 11:42 AM To: [email protected] Subject: Re: Limit on the number of concatenated datasets Joe, There is one, yes. I believe it is 256. Advice from everyone else? ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
