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→VSAM Data Access Techniques: LSR, NSR - Local Shared vs. Non-Shared :CITATION |
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|url=https://www.ibm.com/support/knowledgecenter/SSGMCP_5.6.0/tuning/dfht3c00200.html
|title=Local shared resources (LSR) or nonshared resources}}</ref>
* Global Shared Resources (GSR)<ref name=VSAM.GSR>{{cite web |website=IBM.com (IBM Knowledge Center)
|url=https://www.ibm.com/support/knowledgecenter/SSLTBW_2.3.0/com.ibm.zos.v2r3.idad400/share.htm
|quote=describes considerations for sharing VSAM data sets for NSR or LSR/GSR
|title=Sharing VSAM Data Sets}}</ref>
* Non-Shared Resources (NSR), which is optimised for sequential access. NSR access has historically been easier to use than LSR for batch programs.<ref name=VSAM.LSRorNSR/>
* Distributed File Management (DFM), an implementation of a [[Distributed Data Management Architecture]] server, enables programs on remote computers to create, manage, and access VSAM files.
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