[Info-vax] Example of random access by record number on an RMS fixed record size, relative organization file?

[Johnny Billquist]

On 2023-09-22 00:06, gah4 wrote:
> On Thursday, September 21, 2023 at 2:02:39 PM UTC-7, David Jones wrote:
>> On Thursday, September 21, 2023 at 2:20:44 PM UTC-4, gah4 wrote:
>   
>>>> If the requirement is some type of keyed file, then just use a keyed file type.
>>> OS/360 has a keyed file type, but I believe it does a linear search.
>>> I suspect it is used for the index of ISAM.
> 
>> My recollection is that RMS indexed files are more akin to IBM VSAM file structure,
>> ISAM came earlier.
> 
> VSAM is supposed to have started with OS/VS about 1973.
> That would have been in time for VMS.

Well, RMS didn't start with VMS. But I think RMS was at, or after 1973 
anyway...

   Johnny