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Both Virtual Software Systems' products presented here are mainframe software and require the IBM VM operating system running at first level.
VPARS is a product designed to ease testing for the IBM TPF (Transaction Processing Facility) environment, while VTAPE is a tape simulation product that can be used by any operating systems running under VM.
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VPARS is a software enhancement to VM that allows multiple virtual machines to transparently share a TPF (Transaction Processing facilty) database. Although the TPF records that are modified are maintained on a VPARS database, it appears to each TPF system that it is actually writing to the TPF base. This provides record isolation between virtual machines that are sharing a TPF system. All levels of TPF and ACP are supported by VPARS.
Multi-level (or "concatenated") VPARS databases allow several VPARS databases to be searched for TPF input records. The primary VPARS database is normally a read-write database. The rest are always read-only. Several users can share a read-only VPARS database. This may reduce the number of records required on each user's read/write VPARS database, since a shortload or longload (or any other data) can be written to a database which is then shared read-only among several VPARS users. The primary database can also be a read-only database.
Do you run VM on a mainframe?
Do you have fewer tape drives than your users need, but don't want to buy more?
Does waiting for tapes to be mounted cause a bottleneck?
Are you spending time converting MVS or DOS/VSE jobs to use disk files instead of tapes?
Would you like to test software that uses 3480 and 3490 tape drives, but don't want to buy the drives?
Are you a software developer who would like an easier way to do faster and more thorough testing on your software that uses tape?
Would you like to test your tape management and tape backup software much more quickly?
Do you get tapes from outside sources that have inconsistent labels? Would you like an easy, foolproof way to organize them?
Do you use tapes only once in a while, and sometimes have trouble locating them?
Then check out Virtual Tape!
Virtual Tape is not a tape management system, but a complete implementation of tape drives and tapes in software.
