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- From: heinrich@yvax.byu.edu (Ed Heinrich - The LOKI Group, Inc.)
- Newsgroups: vmsnet.internals
- Subject: re: PATCH on ALPHA ?
- Message-ID: <1992Sep2.075848.905@yvax.byu.edu>
- Date: 2 Sep 92 14:58:48 GMT
- References: <00960015.DDB2E380.11192@WKUVX1.BITNET>
- Organization: Brigham Young University
- Lines: 93
-
- In article <00960015.DDB2E380.11192@WKUVX1.BITNET>, Hunter Goatley <goathunter@WKUVX1.BITNET> writes:
- > <MILLER@TGV.COM> writes:
- >>
- >>
- >>We generally distribute patches as DCL files to avoid problems like that.
- >>On those occations when I need to read someone a patch over the phone
- >>I have them read it back to me before they perform an update. Then I ask
- >>them to rerun patch and examine the new binary values before they run the
- >>new image. With Patch we can have a fix out to the customer within an hour
- >>instead of the day or two it takes to ship a new tape.
- >>
- > Exactly. When I used to work for Clyde Digital (now Raxco), PATCH and
- > I became very good friends. Not that the code had so many major
- > problems, but rather that a lot of customers liked to have their own
- > [...]
- > ago, and is part of the reason I left there.)
- >
- > By using PATCH to update an image:
- >
- > o the customer had the fix or modification within minutes;
- > o as the developer, I didn't have to go back to the sources for
- > the released product and make a change to them;
- > o I didn't have to release the current, not-even-in-alpha-test
- > version of the product that already included the change;
- > o I didn't have to worry about having five or six different images
- > that all did mostly the same thing. The patches were easily
- > categorized and customer support could dole out the appropriate
- > patch to any customer who needed/wanted it.
- >
- > By using REPLACE instead of DEPOSIT, we and the customer were assured
- > that they were patching the right place. I don't remember ever having
- > a customer screw up a patch---even one that had been read to him over
- > the phone or FAXed to him. Granted, that's pretty amazing, but.... 8-)
- >
- >>Has any one else here had any problems using Patch?
- >>
-
- I have to agree w/ both Bruce and Hunter. For software companies that
- have large customer bases PATCH is invaluable. The cost of creating
- new distribution tapes (including cost of a TK-50, operator time,
- overnight shipping, etc.) has been estimated by one comapny I worked
- for to be $45 per hour - the cost of distributing a patch command
- file is much lower. In addition, many system managers WILL apply a
- patch if they are told it fixes a potential crash-related bug, they
- may not, however, rush to do a full installation if you send them a
- patched distribution kit. (I know of some shops that only schedule
- product upgrades during Christmas week when the plant is closed, but
- they will apply a PATCH when they receive it).
-
- I think that the risk of a misapplied patch is LOW enough - assuming
- the author of the patch is competent, AND USES REPLACE - to justify it's use.
- In my experience bad patches have not been a problem, the only problems I
- know of came as the result of a site having PATCH defined as a foreign
- command to another utility and this was fixed by having our patch command
- files always define PATCH to be the DEC image.
-
- As Hunter points out, there are times PATCH can be used to tweak a
- product to a particular customer's requirements and that alone can
- make it useful. Although I have gotten away from the pratice and now
- use a hidden qualifier, I used to have debugging code included in
- products that was turned off. If a customer had problems that could
- not be reproduced in-house, I would give them a patch to enable that
- debugging code.
-
- >
- > I never had any problems using PATCH, but it doesn't surprise me that
- > a lot of people don't like it.
- >
- I think the real issue with PATCH is that a lot of people really don't
- understand it. It is a very powerful tool if used properly. To someone
- who is neither familiar with Macro-32 nor with the particular application,
- it may appear to be some sort of cryptic voodoo....
-
- The question of use vs. abuse of PATCH needs to be managed. Companies
- need to insure that PATCHES are reflected in source code changes as
- soon as the patches are cut to avoid issuing subsequent releases with the
- same bugs. (I used to work for a company that supported RSX-based
- applications. A friend of mine was transfered into a different group
- and given the listings to read to learn the application. After a day,
- he went to the Project Leader and told him, "THIS CAN'T WORK. THE SOURCE
- CODE HAS TOO MANY BUGS TO EVER WORK". The Project Leader said, "Oh yeah,
- I forgot to give you all the ZAPs". ZAP being the RSX equilivent of PATCH.)
-
- For companies, such as TGV, that make the extra effort to resolve
- problems at a customer's site ASAP, patch is an effective tool to have
- available and can make the difference between a one hour resolution
- time and a week's time.
-
- *+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*
- Ed Heinrich
- The LOKI Group, Inc.
- HEINRICH@yvax.byu.EDU
- *+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*
-