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merlyn (47)

merlyn
merlyn@stonehenge.com
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PAUSE-ID: MERLYN [cpan.org].
See my home page [stonehenge.com].

Journal of merlyn (47)

Wednesday May 19, 2004

10:29 AM

DBM::Deep rocks

[ #18831 ]

I just finished writing an article for SysAdmin about lightweight persistent data solutions, and stumbled across DBM::Deep. Today, I'm combining that with Template, as in:

use Template; use DBM::Deep; my $t = Template->new; # create engine my $db = DBM::Deep->new("foo.db"); # create storage $t->process($my_template, { db => $db });

We now have the db hash in the template which is effectively a permanent multi-level data structure. What's more, it can be safely shared between multiple processes (there are lock/unlock methods for critical regions).

This rocks. This module should be core. Down with MLDBM. Up with DBM::Deep!

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Well... (Score:1)

by zatoichi (4897)

I don't seem to be able to read it off your site. Do I have to wait for the mag?
- Re:Well... (Score:2)
  
  by merlyn (47)
  Maybe you missed this:
  [Content embargoed until 00:00:00 01-Aug-2004 per publisher's agreement.]
  It means exactly that. After that date, you'll be able to read it on my site. Before that, yes, you'll have to get the original publication somewhere. Sorry, that's the rules.
  --
  
  Randal L. Schwartz
  
  Stonehenge
  - Re:Well... (Score:1)
    
    by zatoichi (4897)
    
    That is cool. I usually get that mag anyway. :-)
Baby, where have you been all my life? (Score:2)

by samtregar (2699)

This module does look great. Fantastic docs, plenty of tests and zero interface bloat! Thanks for the pointer.
-sam
neat, but... (Score:1)

by perrin (4270)

It seems mostly pointless to me. Performance won't be able to match that of C-based dbm systems + Storable. It may be a good option for people who have a VERY narrow and VERY deep data structure they want to store, but that isn't very common. It still has the same problems with TIE that MLDBM does, i.e. second-level data updates do not trigger the TIE methods.
- Re:neat, but... (Score:1)
  
  by perrin (4270)
  
  I take back the part about second-level updates: it handles these by TIE-ing the inner data as well. I guess this means it only works for standard Perl structures though, and can't store objects.