Problems running 1.1.99 + Clipper w/ Multiple users

Problems running 1.1.99 + Clipper w/ Multiple users

[Gustavo Sverzut Barbieri]

Hello,

I'm trying to get away from M$ from my company, but it's quite hard,
because we need to run a Clipper software with multiple users acessing
the same database file (.dbf).
   I have some problems with that:

1) After running the software and accessing DBF from MS-DOS, when
exiting (exitemu) I get:

C:\ESMERALD>exitemuERROR: lowmem_alloc failed for 10240
ERROR: Unable to allocate memory pool

   This used to work with 1.1.4. Running with Freedos works all right.

2) Trying to open the same DBF from withing 2 different dosemu I got
this error:
 .----------------------------------------------------¬
 | Error DBFNTX/1001  Open error: \ESMERALD\P0070.DBF |
 |                    (DOS Error 5)                   |
 |                                                    |
 |              Quit    Retry    Default              |
 `----------------------------------------------------'

Error DBFNTX/1001  Open error: \ESMERALD\P0070.DBF (DOS Error 5)
Called from LOCKERRHAN(0)
Called from (b)INITHANDL$(0)
Called from DBUSEAREA(0)
Called from NET_USE(63)
Called from ML213(50)
Called from E_GAB3(77)
Called from GAB3(608)


The file is local (not {smb,nfs,...} mounted) at a ReiserFS partition
(if that matters).

The right thing would be to both dosemu open the files, because Clipper
does some kind of record locking.
   How to solve this? I hope you can help me solving this... I want to
run everything on one machine, just exporting the display and avoiding
problems.


PS: lsof | grep dosemu is at http://gsbarbieri.sytes.net/dosemu.lsof

Gustavo

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Re: Problems running 1.1.99 + Clipper w/ Multiple users

[Bart Oldeman]

On Wed, 12 Nov 2003, Gustavo Sverzut Barbieri wrote:

> 1) After running the software and accessing DBF from MS-DOS, when
> exiting (exitemu) I get:
>
> C:\ESMERALD>exitemuERROR: lowmem_alloc failed for 10240
> ERROR: Unable to allocate memory pool
>
>    This used to work with 1.1.4. Running with Freedos works all right.

You need to upgrade your exitemu.com too.

> 2) Trying to open the same DBF from withing 2 different dosemu I got
> this error:

is it possible to download your software somewhere so it will be possible
to reproduce the problem? locking is a long standing problem -- it's not
possible to solve it 100% because DOS and Windows use wildly incompatible
locking schemes.

Bart

Re: Problems running 1.1.99 + Clipper w/ Multiple users

[Dukai Gábor]

Gustavo Sverzut Barbieri wrote:

>The right thing would be to both dosemu open the files, because Clipper
>does some kind of record locking.
>   How to solve this? I hope you can help me solving this... I want to
>run everything on one machine, just exporting the display and avoiding
>problems.
>
The lock whole file option should not be enabled. FreeDOS 2032a works fine.
I run 5 dosemus this way but I haven't encountered locking problems
running them local. I have only a performance issue which I think can
not be solved. 5 Clipper programs aren't quite fast on a 1,4GHz Celeron...



Dukai