As Mike said, the directory in a PDS/E is huge. And using a V2 version of the PDS/E if you are z/OS V2.1 and above makes sense.
A PDSE can be created with JCL, TSO/E, and ISPF, just like a PDS, and can be processed with the same access methods. PDSE data sets are stored only on DASD, not on tape. The directory can expand automatically as needed, up to the addressing limit of 522,236 members. It also has an index, which provides a fast search for member names. Space from deleted or moved members is automatically reused for new members, so you do not have to compress a PDSE to remove wasted space. Each member of a PDSE can have up to 15,728,639 records. A PDSE can have a maximum of 123 extents. When a directory of a PDSE is in use, it is kept in processor storage for fast access. As for adding more storage to it. Have you seen a message that says the dataset is full? If so, the best option is to create a new one with a larger (bigger primary and secondary) space and then copy the original to the new one. With today's storage arrays, I am not sure it makes sense to keep datasets too constrained. Review your file and see what it will require. Is it always written to with NEW members? Or are you always replacing members? For the A PDS/E should work just fine with replacing members. If you are always adding more members, then you need to ensure sufficient space for the activity of the file. If you have a more specific issue, please provide the error messages (complete message and text) and any additional concerns. There are a couple of Share presentations on PDS/Es. PDSE Nuts and Bolts Speaker: Thomas Reed /IBM Corporation SHARE Seattle 2015 Session: 16956 Using PDSEs in your SYSPLEX: Best Practices and Troubleshooting Speaker: Thomas Reed /IBM Corporation SHARE San Francisco Session:12981 And from www.ibm.com Knowledge center https://www.ibm.com/support/knowledgecenter/zosbasics/com.ibm.zos.zconcepts/zconcepts_166.htm Hope this helps Lizette > -----Original Message----- > From: IBM Mainframe Discussion List [mailto:[email protected]] On > Behalf Of gsg > Sent: Monday, April 18, 2016 1:56 PM > To: [email protected] > Subject: Resize PDS/PDSE > > Beside Serena-StarTools, is there any other products that can be used to > resize(add tracks/cylinders) a PDS or PDSE or add directory blocks etc..? ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
