| Author |
About UNIX and LINUX...
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| Ian Poon 2002-12-18, 1:35 am |
| Dear Experts,
What's the main difference between UNIX and LINUX?
Thanks,
Ian | |
| ccieToBe 2002-12-18, 3:56 am |
| Depending on what you define Unix as, I'd say the degree of ambiguity. What's the difference between Windows and Windows XP? | |
| Mr. Linux Guy 2002-12-18, 6:22 am |
| Same thing, for all practical purposes. UNIX now is more of a design philosophy than an operating system. To be an "official" UNIX, you need to conform your OS to the POSIX standards. Linux will probably meet this in a few years. The code bases are different. But from a practical user standpoint or even to a degree, an administrative or developer standpoint, they are largely the same. Talk about specific flavours of distros and you may make more headway than talking in generalities. UNIX consists of Solaris, SunOS, Irix, HP-UX, AIX, DG-UX, etc. Linux is Red Hat, Debian, Slackware, etc. | |
| Ian Poon 2002-12-18, 8:59 pm |
| Thanks Experts!
If building a web application which must support 500 concurrent users, the budget will be USD20,000. What will you do?
1.How many servers you plan?
2.What NOS will you use?
3.What database server will you use?
Regards,
Ian | |
| Mr. Linux Guy 2002-12-19, 7:17 am |
| quote:
Originally posted by Ian Poon
Thanks Experts!
If building a web application which must support 500 concurrent users, the budget will be USD20,000. What will you do?
1.How many servers you plan?
2.What NOS will you use?
3.What database server will you use?
Regards,
Ian
1. One should be enough, but it might be a good idea to have a backup.
2. FreeBSD
3. MySQL | |
| Ian Poon 2002-12-19, 12:25 pm |
| Is that enough to support 500 concurrent users?????? | |
| Mr. Linux Guy 2002-12-19, 12:40 pm |
| It depends on what they will be doing. Browsing or making transactions of some sort. | |
| ccieToBe 2002-12-19, 2:20 pm |
| Like Randy said one would be enough, but with that budget you could easily get two for redundancy. What type of web application are we talking about? Will these be local users, remote users, or some of both? | |
| Ian Poon 2002-12-19, 8:55 pm |
| The system should be supported the following applicatoins:
- Video
- Audio
- Interactive Games by Flash
- Online Test(500 students login at the same time)
- Download materials
- Message board
- Chatroom
- 3000 students + 1000 teachers and parents account (Total:4000 users)
Then...? Can Linux, PC and MySQL support the above requirement? Or must using Solaris, Sun Fire and Oracle? | |
| ccieToBe 2002-12-19, 9:25 pm |
| Can you be more specific on the first two items? "Video" and "Audio" are way to general for me to have any idea of what you're trying to pull off. All the other items would be easy to pull off in just about any Linux or Unix variant. | |
| Ian Poon 2002-12-19, 10:19 pm |
| Just on demand downloading and streaming.
RealPlayer or QuickTime would be better? | |
| ccieToBe 2002-12-19, 11:05 pm |
| Assuming you can get a RealPlayer or QuickTime server application, yes. I'm not sure what platforms are supported by these servers. Check freshmeat.net and each company's web site. | |
| Mr. Linux Guy 2002-12-20, 10:34 am |
| quote:
Originally posted by Ian Poon
The system should be supported the following applicatoins:
- Video
- Audio
- Interactive Games by Flash
- Online Test(500 students login at the same time)
- Download materials
- Message board
- Chatroom
- 3000 students + 1000 teachers and parents account (Total:4000 users)
Then...? Can Linux, PC and MySQL support the above requirement? Or must using Solaris, Sun Fire and Oracle?
Definitely. At the school where I work, we use one server for this, running Red Hat Linux 7.2 right now. We don't use real-time chatrooms, although it would be easily doable. Make sure you document your MySQL tables well and do your ER diagrams before making the database. It is kind of bare so documenting it after the fact is harder than you might think. As for serving audio or video, that should not be a problem. Your web server is mainly a sort of file server that just hands off the requested file. So as long as the apps that are needed to run the video or audio are installed on the client machines, then you should not have a problem. | |
| Ian Poon 2002-12-20, 1:10 pm |
| Thanks for your reply. I worry about 500 concurrent online test students more than other factors because it takes lot of server I/O operation. Are you sure a general PC can support it instead using SUN FIRE?
Access database can support 2GB of data. How many transactions can MySQL support?
Thanks!
Ian | |
| Mr. Linux Guy 2002-12-20, 1:23 pm |
| Well, we have one server that does all of this and we have about 6000 students here. They use something called Blackboard which is a course management package . . . contains links, class information, syllabi, message boards and so on. It uses MySQL. I don't know that there is a hard limit to the table size. When you ask how many transactions does it support, you mean how many transactions per second? Most web developers use MySQL because of its speed. It's the fastest database around. PostgreSQL is another open product that you may want to look into. MS Access should not be used except as a front end to a real database. |
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