Writing a data-base... 
Author Message
 Writing a data-base...

Quote:

> I need to write a simple database manager for a large database.  We have
> tried dBase but have decided that it (and PC's in general) are too
> unreliable, so we are now looking for a way to do this with a UNIX based
> system on one of our HP workstations.  I have writen a such a database
> system before in C, but under the VMS operating system.  VMS gives the C
> programmer access to a number of exciting functions that can handle
> indexing files, random access of files, deleting and editing records in
> the middle of files, locking individual records within files, etc...  all
> of the function that a data-base package such as dBase gives you.
> Unfortunatly, these functions were all built into VMS and are VMS
> specific.  I am wondering if there is some UNIX based package or UNIX
> library that would be helpful with some of these file manipulation tasks.


> read this newsgroup regularly and so I am likely to miss your helpful
> suggestions otherwise.

> Thanx in advance for your help...

> Andy

We are in the same boat.  I found that all of the 4GL vendors
wanted an arm and a leg for their products. Below is a summary
of "lower cost" solutions to the problem.

Public Domain/Net sources:

 - dbm (ndbm) (gdbm)  -  Unix quick file look up routines.
                         dbm, ndbm come with most Unixes.
                         gdbm is GNU dbm.  The main problem
                         with [ng]dbm is that it doesn't support
                         sequenced lookup of data, it's basically
                         a fast lookup from a key.


     ingres89.tar.Z       - University Ingres
                            take a look at embedded quel.
     postgresv2.1.tar.Z   - Postgres relational db.  Nice features
                            including a C library interface.
                            Too bad it caused my 4/280 to crash.
     bsd_database.tar.Z   - a set different access mechanisims
                            for storing data to disk. I believe
                            it has btree, avl, etc...


     server to look for source for these.

Commercial:

  - Raima offers   dbVista (Networked database), dbFile (ISAM)
    3k to 14k for source.

  - Faircom offers  CTREE, DTREE, RTREE.
    I had trouble with this package at my last job.
    2k to 6k for source

  - Informix offers C-ISAM
    Price unknown, check Unixworld for companies selling clones of
    this package.

  - Recital offers full dbase IV compatability along with a C
    library to manipulate Dbase format indexes and files.  We chose
    this because we could implement OpenLook interface tools with
    the C library, and do quick and dirty reporting with Dbase language
    and tools.
    4 to 6k for full Dbase environment plus development library.
    You have to buy runtimes for your users.

   - Cdb from Jaybe Software is an inexpensive package with a
     lot of features.  Call (602) 327-2299.  I almost got this
     one, but we weren't that strapped for cash and the reporting
     abilities (and Dbase) of Recital were very enticing.
     $695

Hope this helps a little.

--

 --------------------------------------------------------------------

| Computer Systems Manager         |                                 |
| Entropic Research Laboratory     |                                 |  
| Washington, D.C.                 |                                 |
|--------------------------------------------------------------------



Sat, 27 Nov 1993 20:05:08 GMT
 Writing a data-base...

Another netter told me I made a mistake in my previous postings
with regard to anon ftp and telnet addresses.  Boy did I
ever.


  This site has ingres, postgres and bsd_db.

Quote:

>     server to look for source for these.

 telnet to quiche.cs.mcgill.ca, login in as "archie", no password.
  This drops you into McGill's archive listing database.

  Do this command:

        prog postgres

          or
        prog ingres

          or
        prog bsd_database

 and you will get a rather large listing of anon ftp sites that have it.

 Try postgres.berkely.edu first, it has what I mentioned.

--

 --------------------------------------------------------------------

| Computer Systems Manager         |                                 |
| Entropic Research Laboratory     |                                 |  
| Washington, D.C.                 |                                 |
|--------------------------------------------------------------------



Sun, 28 Nov 1993 02:44:12 GMT
 
 [ 2 post ] 

 Relevant Pages 

1. performance of writing data writing into database tables

2. Help needed reading database on CD and writing to database on hard drive

3. Data not written to database in sequence?

4. Can we write in database file?

5. Encodeing strings/notes to write to database

6. question about writing large database

7. problem writing access database from visbasic

8. How to write a database multi-user application

9. Writing a database - dbf format - sources?

10. How to write network-database applications??

11. BLOB, FILE, Read/write to Database

12. form submit--validation--page2--server side script to write to database


 
Powered by phpBB® Forum Software