Thread View: comp.sys.mac.databases
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Started by Robert_S._Fukuda
Sat, 07 Nov 1992 09:04
4D 2.2.3 multi-user
Author: Robert_S._Fukuda
Date: Sat, 07 Nov 1992 09:04
Date: Sat, 07 Nov 1992 09:04
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I have built an application using 4D 2.2.3. I have been using it in single-user
mode and would like to start using it in multi-user mode so that I could have
someone else working in the application at the same time. So, I have a few questions
about 4D in multi-user mode...
1. Will the application run using system 7's file sharing capabilities? Does a
mac have to essentially become a file server for 4D to work or can the mac
which has the application run the application simultaneously with another user
on the network?
2. How much of a performance drop will occur using the network? How much of a
difference would using ethernet make?
3. Will I have to re-write sections of code to make things work in multi-user?
4. Any other problems that you can tell me about?
Thanks in advance!
Bob
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Re: 4D 2.2.3 multi-user
Author: Paul E. Jacoby
Date: Mon, 09 Nov 1992 14:15
Date: Mon, 09 Nov 1992 14:15
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In article <1992Nov07.010408.95067@bmug.org> Robert_S._Fukuda@bmug.org writes: >[4D 2.2.3 single-user app in multi-user] >1. Will the application run using system 7's file sharing capabilities? Does a >mac have to essentially become a file server for 4D to work or can the mac >which has the application run the application simultaneously with another user >on the network? You can run with the database file on another machine using System 7's FileSharing. Works basically the same as having a dedicated AppleShare fileserver (with the inherent user-limits built into FileSharing). >2. How much of a performance drop will occur using the network? How much of a >difference would using ethernet make? You will probably be suprised at how much things slow down. It can be pretty horrid. If you end up changing any code, it will probably be to improve performance! Ethernet helps some, but the 4D Server is really going to be the most help. >3. Will I have to re-write sections of code to make things work in multi-user? No, not specifically. You may need to tweak heavily for performance enhancements, and may find yourself changing code which uses automatic relations as a result. You also might want to take a look at any code you have which deletes records or updates items like a sequence number. These are places that the LOCKED() command can come in handy. Take a wander through the language guide, paying attention to the multi-user notes found on commands which behave differently in multi-user mode. >4. Any other problems that you can tell me about? Just performance...it is loads of fun working around the inherent slowness of a fileserver database running over LocalTalk :-) -- | Paul E. Jacoby, Consultant | pejacoby@mmm.com CIS:70404,2507 | | David Mitchell & Associates | | | 3M Center, Bldg 235-3F-27 |--------------------------------------| | Maplewood, MN 55144-1000 | (612) 737-3211 [w] 731-6392 [h] |
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