[elephant-devel] using one store with mutiple lisp instances

[Ian Eslick]

BDB does not work across multiple machines, its transaction support relies on a shared memory region to handle locking so any shared memory architecture (with multiple CPUs) works fine but separate machines and a NAS device don't work.  You'll have to use the Postgres store (5x slower, but reasonably scalable) if you want concurrent access to a single Elephant DB from multiple machines.

On May 4, 2011, at 11:37 AM, Lukas Georgieff wrote:

> Hi Leslie,
> 
>> Hi Lukas,
>> 
>>> Has someone any experience using elephant in that manner?
>> 
>> Yes -- lots in fact. But you need to ask a specific question.
> 
> well, if the points I've mentioned before are correct, I've only one
> specific question :-)
> 
> We want to share a network device that contains the Berkeley-DB files.
> This BDB shall be accessed by two or more other machines that execute a SBCL
> interpreter with our program.
> 
> I am not sure if this works similar to executing two SBCL instances on one
> machine, because I don't know if the elephant-bdb-locking works
> Across several machines!
> 
> 
> Thanks in advance,
> 
> Lukas
> 
> 
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