On Thu, 2005-09-08 at 10:36 -0500, Boysenberry Payne wrote:
> From Chapter 5 Maintaining State:
>
> It uses IPC::Shareable and requires Storable
> It ties Perl data structures (scalars and hashes, but not arrays.)
> the idiom:
> tie %H, 'IPC::Shareable', 'Test', {create => 1, mode => 0666};
> on success it will tie %H to the shared memory segment.
>
> You should be able to get the data from all of your child processes
> once it's tied.
>
> The book suggests using tied(%hash)->shlock and tied(%hash)->shunlock
> to lock the variable before updating and unlocking afterwards to prevent
> multiple processes from updating at the same time.
I don't think this is relevant for the ENV variables problem, but I
wanted to point out that IPC::Shareable is a lot slower (and more
temperamental) than some other choices like Cache::FastMmap, BerkeleyDB,
or even MySQL. I don't recommend using it at this point.
- Perrin
