Hello,
Using BerkeleyDB in Perl 5.8.8 on a FreeBSD system, I am applying its tied
hashes inside forked children of a daemon, as a means of IPC. This works
great, except that for every child, when it forks, I currently set the
environment and initialize the databases, like:
if (not eval {$env = new BerkeleyDB::Env
-Cachesize => 16777216,
-Home => '/var/db/Berkeley',
-Flags => DB_CREATE|DB_INIT_CDB|DB_INIT_MPOOL}) {
log_error ((($_ = $BerkeleyDB::Error) ? ($_) : ($!)));
} elsif (not eval {tie %whitelisted, 'BerkeleyDB::Hash',
....
Etc. I wonder, is this really necessary? For one, I'm thinking it wreaks
havoc on the Cache, as re-initializing a cache for each child seems rather
pointless under these circumstances. Could I not just tie these databases
in the parent once, and then reuse them per child? I know for MySQL
connections this certainly goes wrong.
My main point just is, that I would like the retain the use of a shared
Cache, among the forking children. If anyone knows how to do such a thing,
I'd appreciate hearing about it.
Thanks.
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