Connection at the same time: not possible, it will corrupt the data sooner or later. There is soft lock in the family tree manager to prevent it. Theoretically it is possible by changing the gramps infrastructure, but it would be a lot of work. We focus on gramps-connect subproject to offer this.
Connection from different computers: possible but not supported. You need for safety computers with same OS and same gramps version. In the preferences, you can set the database path to a shared position.
You can use:
1/ a NFS share on linux
2/ dropbox
3/ a samba (windows) share you can mount in the normal filesystem (eg with linux mount with cifs ans for windows I suppose assigning a drive letter for the network drive would work)

Like this, multiple computers work on the same family tree.
This is not supported because people must be very aware of what they do, that is, doing wrong actions can destroy your data. Backup the database location regularly for safety!

Benny

2010/12/31 Stéphane Charette <stephanecharette@gmail.com>
Ralf,

You cannot officially run GRAMPS on multiple computers to access the same database.  However, there are some unofficial ways of doing this, with some caveats.  First, you should ensure you are running the same version of GRAMPS and the same version of BDB across all installations.  Otherwise you'll corrupt the database.  The other thing is you need to ensure the two (or more) computers aren't accessing the database at the same time.

I've never done this, so I'm not 100% certain I'm remembering things correctly, but I know it has come up on the mailing list in the past.  I strongly suggest you you ask on the gramps developer mailing list for additional details on what it takes and how to prevent known things from going wrong.

For the future, someone is also working on things like GrampsConnect which is a web-based approach to running GRAMPS.  I'm not certain what the status is, but some information is available here:  http://gramps-project.org/wiki/index.php?title=GEPS_013:_GRAMPS_Webapp  The idea here is you could have a central GRAMPS repository and then acccess it from multiple computers like you want.

Hope all this translates to German for you.  :)

Stéphane



On Wed, Dec 29, 2010 at 11:37, Ralf Lehmeier <r.lehmeier@freenet.de> wrote:
Stéphane Charette schrieb:
> My google translate says this, which I'm not certain I understand:
>
> "Is it possible to set the profile to a server and multiple
> Computers simultaneously to access it?
> It would not matter whether individually or several at once."
>
> Is the question about having a central GRAMPS database and having access
> to it from multiple computers?
>
> (Do we have FAQ entry about this, as it comes up fairly regularly?)
>
> Stéphane

Danke für den Tip, aber ich finde keine Anleitung in der FAQ.

MfG R.Lehmeier

>
>
> On Mon, Dec 27, 2010 at 15:43, Ralf Lehmeier <r.lehmeier@freenet.de
> <mailto:r.lehmeier@freenet.de>> wrote:
>
>     Hallo!
>     Ist es möglich das Profil auf einen Server zu legen und mit mehreren
>     Rechnern gleichzeitig darauf zuzugreifen?
>     Es wäre egal ob einzeln oder mehrere gleichzeitig.
>
>     MfG R.Lehmeier


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Learn how Oracle Real Application Clusters (RAC) One Node allows customers
to consolidate database storage, standardize their database environment, and,
should the need arise, upgrade to a full multi-node Oracle RAC database
without downtime or disruption
http://p.sf.net/sfu/oracle-sfdevnl
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