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Status Not under consideration
Workspace IBM Java SDK for z/OS
Created by Guest
Created on May 15, 2025

RELATED IDEAS

zFile API write-lock on VSAM at record level for high concurrent VSAM write access to different records

Our product (zExplorer server on z/OS) is using VSAM for book-keeping our metadata of dataset ENQ. The VSAM needs to support high level of concurrent of write (and read) access from different users, servers from different sysplex VMs, to different (in most cases) or same records.

Currently zFile API for VSAM has locking done at VSAM level, causing a race contention for the concurrent write attempts due to exclusive locking attempt per write. It's helpful if the locking could be done at record level, so the contention could be improved especially for concurrent writes to different records.

There is a reference of Record Level Sharing VSAM feature that may be related to our requirement https://www.ibm.com/docs/en/zos/2.4.0?topic=sharing-vsam-record-level

Thank you.

Idea priority Medium
  • Guest
    Aug 7, 2025
    .ZFile allows access to use RLS via the mode string. Otherwise it is outside the scope of any product to control access to a data set on a record level other than DFSMS.
    Reply

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