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From Andy Seaborne <>
Subject Re: Concurrent updates in TDB
Date Thu, 03 Feb 2011 21:41:40 GMT

On 03/02/11 18:26, Frank Budinsky wrote:
> Hi,
> In a previous exchange Damian told me:
>> You can't write
>> to the same TDB store from different processes.
> I'm wondering if there are any safe exceptions? For example, is it safe if
> one process always adds/removes/updates statements in named graphs, while
> the other process works exclusively in the default graph (i.e., the graphs
> being used by the two processes are completely independent)? Is this safe,
> or am I treading on thin ice by using the same TDB store for both
> processes?

No - it's not safe.

One process must control all the database files and have exclusive access.

You can use Fuseki as a database server then have several applications 
accessing and modifying the data.


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