July 30, 2014
Find :HELP for what you don't know exists
Last week we presented a reprise of advice about using the VSTORE command while making backups. It's good practice; you can read about the details of why and a little bit of how-to in articles here, and also here.
But since VSTORE is an MPE command, our article elicited a friendly call from Vesoft's Vladimir Volokh. He was able to make me see that a great deal of what drives MPE/iX and MPE's powers can remain hidden -- the attribute we ascribed to VSTORE. "Hidden, to some managers running HP 3000s, is the VSTORE command of MPE/iX to employ in system backup verification." We even have a category here on the blog called Hidden Value. It's been one of our features since our first issue, almost 19 years ago.
Finding help for commands is a straightforward search, if those commands are related to the commands you know. But how deep are the relationships that are charted by the MPE help system? To put it another way, it's not easy to go looking for something that you don't know is there. Take VSTORE, for example. HP's HELP files include a VSTORE command entry. But you'll only find that command if you know it's there in the operating environment. The "related commands" part of the entry of STORE, identifying the existence of VSTORE, is at the very bottom of the file.
Vladimir said, "Yes, at the bottom. And nobody reads to the bottom." He's also of the belief that fewer people than ever are reading anything today. I agree, but I'd add we're failing in our habits to read in the long form, all the way beyond a few paragraphs. The Millennial Generation even has an acronymn for this poor habit: TLDR, for Too Long, Didn't Read. It's a byproduct of life in the Web era.
But finding help on VSTORE is also a matter of a search across the Web, where you'll find archived manuals on the 5.0 MPE/iX where it was last documented. There's where the Web connects us better than ever. What's more, the power of the Internet now gives us the means to ask Vladimir about MPE's commands and the MPEX improvements. Vladimir reads and uses email from his personal email address. It's not a new outlet, but it's a place to ask for help that you don't know exists. That's because like his product MPEX, Vladimir's help can be conceptual.Hold down the right-most or left-most mouse button and you'll see contextual help in plenty of applications. MPE commands don't have this feature, and while they don't seem to need it, conceptual help is missing, too. There's :HELP for many subjects, but conceptual help involves skipping over those TLDR habits.
Our original article about VSTORE used the command in context with a primer on when to create a System Load Tape. Do a VSTORE when you make an SLT, said Vladimir as well as our ally Brian Edminster. Creating context is high-order programming, something we can do more easily with our wetware than with software. It's about seeing relationships, connecting the dots.
"You can't ask for help for something you don't know exists," is how Vladimir posed the problem of contextual help in the MPE interface. Go to the %HELP of MPEX and you'll get related commands right away. For example, typing %HELP STORE will allows you to choose from the following topics:
1. %MPEXSTORE, MPEX command
2. MPE's :RESTORE help text
3. MPE's :STORE help text
4. MPE's :VSTORE help text
5. STORED, a file attribute variable
In comparison, you might not be aware of VSTORE's relationship to backups by using HP's :HELP files.
How did we learn about those %HELP options? The Internet led us to a 19-year-old technical paper written by Paul Taffel while he was in the Vesoft stables. The paper, hosted at Gainsborough Software, details the improvements to MPEX as a result of integrating the (then-new) Posix interface of MPE. Two-thirds of the way through an article of 2,800 lines, there's that %HELP information. (There's even a little joke about typing %HELP SENTENCE, and another about %HELP DELI in MPEX.)
It's all out there, somewhere, these opportunities to learn what you even don't know exists, but need to know. And you'd want to learn about efficient and effective use of MPE because? Well, because an HP 3000 might be a key part of your datacenter longer than expected -- and your best expert has already typed his final :BYE. In that 19-year-old article, Taffel expressed Vesoft's ideal about questions from the community.
We at VESOFT really encourage you to contact us with your favorite "I'd like to do this but I can't" problem. MPEX has evolved largely as a result of the continued suggestions of our many thousands of users, and we hope to continue this process as long as you continue to come up with new problems.
After that message, there's a contact phone number for Vesoft, the one that still reaches the company's offices, unchanged after decades. But there's also current email to follow by this year for contextual help, by dropping a note into Vladimir's inbox. Your reply might include a call, a sample of MPE help that's so well hidden you don't know you need it.
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VSTORE is for checking the ability of MPE/iX to read the files on a STORE tape, not usually the SLT. It doesn't compare the files on tape to the ones on disk. I always use it on a different tape drive than the one used to do the STORE. CHECKSLT.MPEXL.TELESUP is used for checking the validity of an SLT tape. It is specific to the version of MPE/iX it is on. So, it has to match the version of MPE/iX that the SLT was created on.
Posted by: Paul Edwards | Jul 31, 2014 1:46:34 PM
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