Individual concurrent reads are safe. Pretty much everything is
synchronized at the top of level.
However, iterators / tuple browsers are unsafe under concurrent updates.
You would have to synchronize on the RecordManager instance to maintain a
consistent view while iterating.
alex
On Thu, Oct 22, 2009 at 5:10 AM, Chas Emerick <[email protected]> wrote:
> I've been plumbing around the list archives for a while, but they're
> something of a jumble (thanks, Sourceforge!), so I figured I'd open a
> new thread to ask:
>
> What level of read concurrency does jdbm support?
>
> What seems clear is that, to be safe, there should only be one thread
> writing to a jdbm database (although it appears that it is possible
> for multiple threads to participate in a transaction, I'm perfectly
> fine with serializing all write access). However, I came across at
> least a number of comments that lead me to believe that concurrent
> reads are unsafe as well, although they're all from pre-history (e.g.
> 2001).
>
> Thanks,
>
> - Chas
>
>
>
>
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