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* Mutex via database
@ 2005-05-04 11:28 Enrico Weigelt <weigelt@metux.de>
0 siblings, 1 reply; 2+ messages in thread
From: Enrico Weigelt @ 2005-05-04 11:28 UTC (permalink / raw)
To: pgsql-sql
Hi folks,
i've a dozen of servers processing jobs from a database.
Some servers may only run exactly once, otherwise I'll get jobs
done twice.
Is there any way for implementing an kind of mutex within the
database, which is automatically released if the holding
process/connection dies ?
thx
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^ permalink raw reply [nested|flat] 2+ messages in thread
* Re: Mutex via database
@ 2005-05-04 11:38 Markus Schaber <schabi@logix-tt.com>
parent: Enrico Weigelt <weigelt@metux.de>
0 siblings, 0 replies; 2+ messages in thread
From: Markus Schaber @ 2005-05-04 11:38 UTC (permalink / raw)
To: pgsql-sql; +Cc: weigelt@metux.de
Hi, Enrico,
Enrico Weigelt wrote:
> i've a dozen of servers processing jobs from a database.
> Some servers may only run exactly once, otherwise I'll get jobs
> done twice.
>
> Is there any way for implementing an kind of mutex within the
> database, which is automatically released if the holding
> process/connection dies ?
Use the "LOCK" sql command, possibly together with transaction isolation
set to serializable.
Markus
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2005-05-04 11:28 Mutex via database Enrico Weigelt <weigelt@metux.de>
2005-05-04 11:38 ` Markus Schaber <schabi@logix-tt.com>
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