Dump In-memory DB_File to disk

deibyz has asked for the wisdom of the Perl Monks concerning the following question:

Dear monks,

Assume I have a DB_File tied hash created in memory, with something in the lines of:

my $db = tie my %h, "DB_File", undef, O_RDWR|O_CREAT
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After populating it with some key/value pairs (potentially many), given some conditions I would like to create a proper db_file on disk with this data, but I would like to do it directly, without having to go through each %$h or something like that, to avoid performance penalties. I've been searching in the DB_File and dbopen documentations, but haven't found anyway to do it. Any ideas? Regards, D.

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Re: Dump In-memory DB_File to disk by BioLion (Curate) on Oct 06, 2009 at 11:33 UTC
Using ad_export from DBD::AnyData you can convert in-memory databases into a file of specified format, including DBI databases. You can also pump out a host of other formats too. This may require some re-organising of your datastructure though? Possibly a silly thought, possibly not, but i am not sure how compliant Berkley DB and DBI are... Although by the looks of it, DBD::AnyData seems to support many database formats. HTH. Just a something something...	[reply]
Re^2: Dump In-memory DB_File to disk by Anonymous Monk on Oct 06, 2009 at 11:43 UTC
That would be slower than direct approach	[reply]
Re: Dump In-memory DB_File to disk by Anonymous Monk on Oct 06, 2009 at 11:41 UTC
My suggestion is avoid in-memory database from beginning. Writing In-Memory Berkeley DB Applications	[reply]