I have a potential customer who wants to run my app on Windows XP but
store data on a Red Hat Linux server.  I'm using local access data files
(not C/S) but set semaphore locks on the data for various purposes.
Will the semaphore locks still work on a Linux server?  Are there any
other potential problems I should be aware of?

Gordon Turner

Oops, I forgot to add the following...

We're using DBISAM 3.22 & Delphi 7.

I should also add that the app is a multi-user app.  We manage our own
record locks (updating a field in the table to lock and unlock a
record), but I'm not sure if there are any other potential problems
storing the DBISAM files on the Linux server.

Gordon Turner

Gordon Turner wrote:
> Oops, I forgot to add the following...
>
> We're using DBISAM 3.22 & Delphi 7.
>
> I should also add that the app is a multi-user app.  We manage our own
> record locks (updating a field in the table to lock and unlock a
> record), but I'm not sure if there are any other potential problems
> storing the DBISAM files on the Linux server.
>
> Gordon Turner
Gordon;
Have your client buy a copy of DBISAM for Linux, Flip to C/S and be
hassle free

Allan

Allan brocklehurst wrote:
>
> Have your client buy a copy of DBISAM for Linux, Flip to C/S and be
> hassle free

It's not that straight forward since it is a commercial product.
Converting their existing data to the latest version of DBISAM and
modifying a number of database file access functions (backup and restore
for example) to begin with.  Also, I can't assume the user is a
technical person (most of my customers are not) so having them install
and maintain the server portion of the process may require more
technical support on my part.  All this for a $100 sale.

Gordon Turner

Gordon

Since you are acessing data directly, you just need to start the daemon
Samba at Linux server and don't need a copy of DBISAM for Linux (sorry Tim).
Just configure SMB.CNF file disabling oplocks and it will work fine.

Eduardo

Eduardo,

<< Since you are acessing data directly, you just need to start the daemon
Samba at Linux server and don't need a copy of DBISAM for Linux (sorry Tim).
>>

No problem.  And Gordon - Eduardo is correct, Samba should work okay
provided that you disable the opportunistic locking in the configuration.
There have been some issues with Samba and OpLocks.  It's certainly not a
simple protocol to keep up with because MS keeps updating it between various
Windows versions.

--
Tim Young
Elevate Software
www.elevatesoft.com

Tim Young [Elevate Software] wrote:
>
> No problem.  And Gordon - Eduardo is correct, Samba should work okay
> provided that you disable the opportunistic locking in the configuration.
> There have been some issues with Samba and OpLocks.  It's certainly not a
> simple protocol to keep up with because MS keeps updating it between various
> Windows versions.

Thanks Tim and Eduardo.  I've passed this information onto my customer.
 I got exposed to Unix in a former software life, but I've never been
able to find the time (and spare hardware) to install and work with Linux.

Gordon Turner

Gordon,

Some really old hardware is sufficient (it seems) based upon
my experimentation.

The time... I can't help you with that except to suggest retirement

Jon

Gordon Turner wrote:
> Tim Young [Elevate Software] wrote:
>>
>> No problem.  And Gordon - Eduardo is correct, Samba should work
>> okay provided that you disable the opportunistic locking in the
>> configuration. There have been some issues with Samba and OpLocks.  
>> It's certainly not a simple protocol to keep up with because MS keeps
>> updating it between various Windows versions.
>
> Thanks Tim and Eduardo.  I've passed this information onto my customer.
>  I got exposed to Unix in a former software life, but I've never been
> able to find the time (and spare hardware) to install and work with Linux.
>
> Gordon Turner
>
>

Jon Lloyd Duerdoth wrote:
>
> Some really old hardware is sufficient (it seems) based upon
> my experimentation.

How old?  I looked at a Linux implementation comparison a little while
ago (ZDNet or CNet - I don't remember which) and it seemed like I needed
at least 256MB of RAM and 1 GB of disk space on a P4 400Mz+ machine.

I've got a really old P4 150Mz with 64MB of RAM (It's my Win 98 test
machine where I check how large fonts affect my software
implementation.)  If that will work, can you suggest where I would get a
copy of Linux that would work?

> The time... I can't help you with that except to suggest retirement

Gasp!  No!!!  Not the "R" word!  Wait, I'm not ready to go yet!  I've
still got more ideas for updates (he screams as he is dragged forcefully
from his keyboard).

Gordon Turner

Gordon

>I've got a really old P4 150Mz with 64MB of RAM (It's my Win 98 test
>machine where I check how large fonts affect my software
>implementation.) If that will work, can you suggest where I would get a
>copy of Linux that would work?

I got SUSE 9.3 running on a PIII - 233MHz notebook with 64Mb RAM - (its back to W98 now) but it was PAINFULLY slow.

Roy Lambert