[AccessD] How does Access locking work

It does make sense and that is what I am talking about.

John W. Colby
www.ColbyConsulting.com

On 9/15/2011 1:51 AM, Drew Wutka wrote:
> I think I have the old Jet white paper somewhere.  But basically Jet
> would 'lock' the .ldb file where it needed to lock the .mdb.  So the
> .mdb would never be locked (allowing for multiple edits), and the lock
> on the .mdb would be actually on the .ldb file.
>
> So say the .mdb was 100 megs.  And it needed to lock the 50th megabyte,
> the .ldb file was always small (I think it was 64 bits per user, up to
> 255 users), so it would never reach the 50 meg size, but the 'lock'
> would be placed on the 'virtual' 50 meg point of the .ldb.
>
> Make sense?
>
> Drew
>
> -----Original Message-----
> From: accessd-bounces at databaseadvisors.com
> [mailto:accessd-bounces at databaseadvisors.com] On Behalf Of jwcolby
> Sent: Wednesday, September 14, 2011 9:47 PM
> To: Access Developers discussion and problem solving
> Subject: [AccessD] How does Access locking work
>
> I need to find documentation about the actual locking mechanism for
> Access.  I vaguely remember something about Jet using a file, and (IIRC)
> applying system locks to pieces out past the end of that file.  It is
> all very old memories and I am not finding anything "real" about the
> actual details.
>
> Anyone know what it was I read so long ago?
>
> --
> John W. Colby
> www.ColbyConsulting.com
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